The Importance Of Heat Integration In Distillation Columns Engineering Essay

The Importance Of Heat Integration In Distillation Columns Engineering Essay The combination of high crude oil prices due to increasing energy demand and concern about pollution has led researchers to exploring the possibilities of more energy efficient and environmentally friendly process technologies. The importance of distillation as a separation technique has made making it more energy efficient a high priority. Consequently, many heat integrated design schemes have been produced through the decades that it has been investigated and many of these techniques are outlined in this report along with some current commercial schemes. However, this technology has not been fully commercialised and this is mainly due to the high initial investment costs and the complexities of the equipment design, control schemes and operation. There is also a lack of real experimental data that is needed in order to verify the many theoretical predictions that claim that large energy saving are possible. Several areas have been identified as in need of further research in the fu ture to hopefully allow this technology to become an industrial standard and not just a theory. Introduction 1.1 The Importance of Heat Integration in Distillation Columns The combined threat of increasing energy demands and costs, global warming and the increased dependence upon oil imported from politically unstable parts of the world have resulted in an interest in enhancing the thermodynamic efficiency of current industrial processes. Increasing energy efficiency in chemical processes not only provides economic benefits but also it leads to reduce the emissions resulting from the process operation. Distillation is perhaps the most important and widely used separation technique in the world today as it is used for about 95% of all fluid separation in the chemical industry. In the US, about 10% of the industrial energy consumption accounts for distillation while it accounts for an estimated 3% of the world energy consumption. More than 70% of the operation costs are caused by the energy expenses (Nakaiwa et al. 2003.) It is a fact that the energy consumption in distillation and CO2  gases produced in the atmosphere are strongly related as the highe r the energy demands are the larger the CO2  emissions to the atmosphere are. This is due to the energy being mostly generated through the combustion of fossil fuel. Despite its apparent importance the overall thermodynamic efficiency of a conventional distillation is only around 5-20% (Jana, 2009). Clearly, improving on this value is imperative and a top priority objective. In order to achieve this, the concept of heat integration was introduced almost 70  years ago (Jana, 2009.) The basic idea of heat integration is that the hot process streams are heat exchanged with cold process streams which results in a more economic use of resources. Consequently a whole range of heat integrated distillation schemes have been proposed. In a conventional distillation column (Figure  1) with a feed, a top product and a bottom product, heat is added at the bottom of the stripping section. In distillation, heat is used as the separating agent. The heat is conventionally supplied at the bottom reboiler in order to evaporate a liquid mixture but is lost when liquefying the overhead vapour at the reflux condenser. The temperature of this heat corresponds to the highest temperature point in the distillation column. The temperature of the heat rejected at the top of the rectifying section corresponds to the lowest temperature point in the distillation column. Thus, distillation involves the loss of heat from a higher temperature level to a lower temperature level in order to perform the work of separation. The efficiency of distillation is reduced if the heat rejected in the rectifying section of the distillation column is not reutilized (Smith, 2005.) This is the principle from which heat integration of distillation is m ainly based. Full-size image (28 K) Figure A schematic representation of a conventional distillation column (Kiran, 2012) 1.2 Benefits and Drawbacks of Heat Integration The possible benefits of heat integration tend to be potential energy savings due to greater efficiency and also less waste. Unfortunately due to a number of issues the technology has yet to be commercialised. Installation of any type of heat integration will entail a higher capital investment than that of any standard distillation column due to the increased complexity of the design. Also, the amount by which the efficiency is improved by is not always substantial in certain cases and therefore it must be considered whether the perceived benefits from the greater efficiency outweigh those of the added costs. The increased complexity can also increase the difficulty of designing, operating and controlling the system. There has also been a lack of experimental data for large scale examples to verify theoretical predictions. A successful heat integrated column design would show positive energy savings at reasonable economic figures that can be effectively operated and controlled. 2. Energy-efficient distillation techniques This section discusses some of the many heat integrated techniques that have so far been proposed with the purpose of improving the energy efficiency of separation processes. 2.1 Pseudo-Petlyuk column The thermally coupled distillation scheme was first patented by Brugma in 1937. The process is used for separating a ternary feed and consists of a conventional prefractionator and side stream tower. Both of these parts are equipped with a reboiler and a condenser. The unit is divided vertically by a wall through a set of trays in order to keep the feed stream and side product separated. It was Wolff and Skogestad (1995)who referred to this set up as a pseudo-petluk column. However, their research led to some concerns about serious issues during operation for high purity separations which would limit the effective use of this system in many cases (Wolff, 1995.) 2.2 The Divided-Wall Column The elimination of the prefractionator unit from the pseudo-Petlyk column leads to a configuration known as the divided-wall column (DWC) (Robin Smith et al, 1992.) It is displayed in figure 2. It is achieved by introducing a vertical partition into a distillation column to arrange a prefractionator and a main column inside a single shell. The advantage of this partitioned column is that a ternary mixture can be distilled into pure product streams with only one distillation structure, one condenser and one reboiler. Naturally the cost of the separation is reduced along with the number of equipment units which leads to a reduced initial investment cost. Subsequently, further research has been undertaken with for example Agrawal (2001) discussing for multicomponent mixture separation the various types of partitioned columns and their advantages and disadvantages. However, as a result of the lack of experience in design and control, the dividing wall columns were yet to be extensively used in industry. This is changing though and there has been a rapid growth in the number of units in use. In 2004 there were 40 units used worldwide (Adrian et al, 2004) Full-size image (11 K) Figure A schematic representation of a Petlyuk distillation column (also known as divided-wall column) (Jana, 2009). 2.3. Petlyuk column Petlyuk et al (1965) presented a detailed theoretical study on a divided-wall column called the Petlyuk column. This reduced Petlyuk structure involves low initial investment and consumes less energy which reduces the operating costs. However, upon comparison with a conventional distillation unit the Petlyuk column has many more degrees of freedom in both design and operation which can cause difficulty when designing the column and creating a control system. As displayed in figure 3, the two-column Petlyk configuration will commonly consist of a prefractionator connected to a distillation shell equipped with only one condenser and reboiler (Jana, 2009.). The thermal coupling in a Petyluk scheme has lead to large energy savings. Unfortunately, little progress has been made with regard to improving operation and control of the structure which hinders its usability. . Full-size image (20 K) Figure A schematic representation of a two-column Petlyuk structure. (Jana,2009) 2.4 Multi-Effect Column The basic idea of this method for separating multicomponent mixtures is to use the overhead vapour of the one column as the heat source in the reboiler for the next column. The columns may be heat integrated in the direction of the mass flow which is forward integration or back integration can be used with is in the opposite direction. A sample column that represents a multi-effect column with a prefractionator for a ternary mixture separation is displayed in figure 4. Full-size image (19 K) Figure A schematic representation of a multi-effect system for ternary (A-C) feed mixture (Jana, 2009) This integrated arrangement has been proved to provide considerable energy savings (Cheng et al, 1985.) However, the issue preventing commercialisation of the process is the operation difficulties owed to the nonlinear, multivariable and interactive nature of the process (Han et al, 1996.) More research must be undertaken to try and find appropriate solutions before there can be a more extensive use for this system and to make use of the energy saving potential. 2.5 Heat Pump-assisted Distillation Column The heat pump is mainly used as a way for increasing the thermal economy of a single distillation column. The heat pump-assisted distillation column or vapour recompression column (VRC) was implemented as an energy-efficient process for the chemical industries after an oil crisis in 1973 (Jana, 2009.) In the system the overhead vapour is pressurised by a compressor to the point where it can be condensed at an increased temperature which will supply the heat required in the reboiler. A schematic representation of this can be seen in figure 5. Full-size image (14 K) Figure A schematic representation of a heat pump-assisted distillation column (Jana, 2009) There are potentially large energy savings to be made, mainly for fractionating close boiling mixtures. This is due to the small temperature difference between the top and bottom of the column which will result in small compression ratios and consequently small compressor duties being required (De Rijke, 2007.) For a conventional distillation column attempting to fractionate the same close boiling mixture there will be a higher reflux ratio and thus larger reboiler duties would be required. The drawback for this technique is the high capital costs. Reducing the cost of running the heat pump-assisted distillation column would certainly increase its cost effectiveness and make it more viable as an option. 2.6 Heat integrated distillation column Using heat pump technology it is possible for separate rectifying columns and stripping columns to be heat integrated internally. This structure is a heat integrated distillation column (HIDiC.) Originally only part of the stripping and rectifying sections were integrated under the name of the SRV scheme but later column design has incorporated heat integration between the whole rectifying and stripping sections (Jana, 2009.) Figure 6 displays a typical partial energy integrated distillation scheme. Full-size image (26 K) Figure A schematic representation of a partial HIDiC scheme (Jana, 2009)) In this configuration the stripping column operates at pressure lower than the rectifying column. A compressor and throttling valve are installed in order to adjust the pressures. The pressure differential means there will be a corresponding difference in operating temperature which allows energy to be transferred between the two columns through heat exchangers. Reflux flow for the rectifying section and vapour flow for the stripping section is generated from the heat exchanged between the rectifying hot vapour and the stripping cold liquids. This allows the reboiler heat load to be substantially reduced. Less energy is consumed the more heat that is exchanged and through appropriate process design it can be possible for reflux and/or reboil free operations to be performed. It has been shown that the HIDiC, compared to the VRC, can lead to energy savings of about 50% (Sun et al, 2003.) However, the structure has a very complex design and requires large capital investment (Jana, 2009.) Meanwhile it has also been found find that there are many binary feed separations where HIDiC is actually less energy efficient than simple heat pump schemes using only one or two heat transfer locations. Furthermore, it was shown that the energy efficiency of HIDiC cannot be solely decided based on the feed composition or product purities as many calculations are based. A better performance indicator is the temperature profile along the height of the rectifying section relative to the corresponding temperature profile in the stripping section (Herron ,2011) Research is ongoing, focussing on the dynamics and the thermodynamic efficiency aspects while extensive research was undertaken by Suphanit (2011) focussing on optimal heat distribution depending on the column arrangement and number of heat exchangers. Suphanit also produced a couple of potential schemes display in figure 7. Full-size image (41 K) Figure Fig. 2. Internally heat-integrated distillation column (HIDiC) (a) and HIDiC constructed in a concentric column (b) (Suphanit, 2011) The development of HIDiC has now reached the pilot plant stage in some countries such as Japan and the Netherlands.  Despite this, further research, both in terms of design and hardware development issues, is still needed before this application can be fully established and accepted in commercial use while further detailed study on the economic evaluation of this column structure is needed in order to ensure its advantage over more conventional schemes (Suphanit, 2011.) 2.7 Heat Integrated Batch Distillation Column Batch distillation is generally known to be a less energy efficient option than its continuous counterpart. However, the batch distillation is extensively used in pharmaceutical, fine and specialty chemicals industry due to its greater flexibility where the demand and lifetime of the products can be uncertain and may vary significantly with time. Jana (2009) proposed a novel heat integrated batch distillation column (HIBDC.) The proposal was based on a binary batch distillation example that separates an equimolar ethanol/water mixture. In comparison with the conventional batch process, the HIBDC also includes a compressor. The produced vapour in this concentric reboiler is firstly compressed and is then introduced at the bottom of the rectifier. This results in a pressure difference between the rectifier and reboiler. Consequently, energy is exchanged from the rectifier to the reboiler through the internal wall and brings the downward liquid flow for the former and upward vapour flow for the latter. This reduces the reboiler and condenser heat loads. However, an additional compressor duty is involved in the thermally coupled column. Full-size image (28 K) Figure Schematic of a heat integrated batch distillation column (HIBDC) [D = distillate rate (kmol/h), L1 = flow rate of liquid leaving 1st tray (kmol/h), nt = top tray, Qc = condenser duty (kW), Qn = rate of internal heat transfer from nth tray (kW),R = ref reflux rate (kmol/h),  VB  =  vapor boil-up rate (kmol/h)] (Jana, 2009) From the investigation it was observed that the HIBDC system appears overwhelmingly superior to its conventional stand alone column providing a significant savings in energy as well as cost. The potential energy integration leads to achieving about 56.10% energy savings and 40.53% savings in total annual cost. However, a single example comparing different configurations does not indicate that the proposed method would perform equally successfully for all mixtures. Therefore it was proposed that further investigation would take place in the future to come to a full conclusion as to the future promise of this technique. Takamatsu et al. (1998) also performed a comparative study between the heat integrated batch distillation and the conventional batch distillation that proved the superiority of the heat integrated scheme over its conventional counterpart in terms of energy efficiency. However, no more development has been found with regard to energy-efficient batch distillation. 2. 8 Intensified Heat Integrated Ternary Distillation Column Kiran et al. (2012) extensively investigated a novel intensified heat integrated ternary distillation column (int-HITDiC.) Their objective was to show that the int-HITDiC was superior in terms of energy consumption and economics than its general form, namely the HITDiC and the conventional standalone column. It was also investigated that the traditional HITDiC scheme shows a reasonable energy household and better economic figures than the conventional standalone column. The int-HITDiC is a hybrid scheme which gets the advantage of both the HIDiC and VRC strategies. It was found that this kind of heat integration could help to improve the process design not only in terms of thermodynamic efficiency but also in terms of capital investment. The intensified scheme can be classified into two different structure based on the number of compressors: the single compressor int-HITDiC and the double compressor int-HITDiC. From experimentation it was found that the double compressor system provided the best performance in terms of cost and energy consumption where it produced a maximum energy saving of 59.15%. Another attraction of the proposed double compressor int-HITDiC was its least payback time of excess capital which was 3.44 years. The performance of this proposed thermal integration techniques was measured using a ternary distillation system. A more general conclusion regarding energy and economic viewpoints could be found by extending its application to other example processes and checking for a consistent performance. An issue that should be mentioned regarding intensification is that although economic benefit is usually achieved the operability of the column tends to be reduced. Also, if the HIDiC is sensitive to disturbances then potentially the economic, safety and environmental performance may be unfavourably affected (Kiran et al, 2012.) 2.9 Internally Heat-Integrated Reactive Distillation Processes Internally heat-integrated distillation and reactive distillation are two promising technologies that can potentially result in considerable economical benefits. Jiao et al. (2012) conducted a study regarding internally heat-integrated reactive distillation; a technology which combines internally heat-integrated distillation and reactive distillation and is employed in order to further enhance the advantages of both technologies. The study tested three ideal quaternary systems, that reactive distillation processes with internal heat integration have been designed to use, to find which had the best potential for decreasing the total annual cost. These systems are types IP  and IIP  with stoichiometric design and also type IR which has excess design. In the case of type IP which has the reaction zone located in the centre of the reactive distillation column (RDC,) M-HIRDC will provide the highest economical benefit for the endothermic and exothermic reactions, chemical equilibrium constants and various relative volatilities. Here the reaction rate in the reactive trays in the high pressure section increases while in the reactive trays located in the pressure section the reaction rate will decrease. It is desirable to use HIRDC. The reaction zone is located at the bottom of the RDC when using type IIP  . Here the process with M-HIRDC will have better economical design than that of a conventional reaction distillation process in the case of both exothermic and endothermic reactions. The M-HIRDCs reactive trays are mostly positioned in the low-pressure section. Due to low pressure and temperature values the reaction rate is also smaller. It can be concluded that there are only minimal benefits to using HIRDC. The final system, type IR, has its reaction zone placed at the top of the RDC. This process shows the smallest total annual cost for the endothermic and exothermic reactions. The reactive trays are situated in the HP section and due to the increased temperature and pressure values the reaction rate is also increased. Thus, HIRDC is again a desirable operation. In conclusion, when the reaction zone is situated at the top of the column the lowest total annual cost will be found for the RDC. 2.10 Externally Heat-Integrated Double Distillation Column Liu et al. (2011) investigated the potential of externally heat-integrated double distillation columns (EHIDDiC.) In terms of the separation of an ideal binary mixture of hypothetical components A and B, the synthesis and design of the EHIDDiC were studied with the assumption of a constant pressure elevation between the low-pressure (LP) to the high-pressure (HP) distillation columns that are involved. It was found employing between one and three external heat exchangers results in a reasonable design option for the EHIDDiC. When a number of external heat exchangers greater than three were employed the process configuration has to be carefully determined as the increase in number of stages externally heat-integrated may not actually be beneficial to the system performance. This is due to the strong mass and heat couple between the LP and HP distillation columns that are involved and reflects the unique feature of the EHIDDiC. To reduce capital investment, the total external heat exchange areas should be installed through as small a number of heat exchangers as possible. The extreme situation would be the employment of a single external heat exchanger which would need knowledge in arranging the total heat heat transfer areas between the HP and LP distillation columns involved. These findings are of great significance both to process synthesis and design. A novel decentralised control scheme was also proposed for use for EHIDDiC operation. (Liu et al, 2011.) Huang et al. (2011) investigated three different configurations for externally heat-integrated double distillation columns performances for separating a binary mixture of ethylene and ethane. The configurations were a symmetrical EHIDDiC (S-EHIDDiC), an asymmetrical EHIDDiC (A-EHIDDiC), and a simplified asymmetrical EHIDDiC (SA-EHIDDiC), which were compared with respect to aspects related to process design and controllability. It was found that the A-EHIDDiC and SA-EHIDDiC were both superior to the S-EHIDDiC in terms of thermodynamic efficiency as well as in terms of process dynamics and controllability. Upon comparing the A -EHIDDiC and SA-EHIDDiC, the latter showed similar behaviour with the former in terms of process design and controllability. These results demonstrated that the asymmetrical configuration should generally be favoured over the symmetrical one for the development of the EHIDDiC (Huang et al, 2011.) 2.11 The structured heat integrated distillation column Krikken et als (2012) recent investigation into a structured heat integrated distillation column showed that a plate-packing configuration using structured packing gave a superior performance in comparison with the HIDIC based on the plate-fin heat exchanger. Further experimentation showed that the mass transfer and heat transfer efficiency increased significantly with increasing throughput. However, this was accompanied by an increasing pressure drop per stage. By simulating an industrial scale plate-packing unit it was found that an even better performance is possible through increasing the volumetric thermal load by further optimisation of the internals. The principle of a S-HIDiC is shown in figure 9. Here the rectifier and the stripper are alternatively stacked in a sandwich of layers which creates a high surface area for the heat and mass transfer while maintaining a high voidage. Full-size image (36 K) Figure Flow scheme of an S-HIDiC.(Krikken et al, 2012) Internals are used inside the layers to optimize the HIDIC performance. In the plate-packing HIDiC, which was developed and tested in this study, both heat and mass transfer are in balance at an acceptable pressure drop. This result of this is a column design providing substantial cost and energy savings. It could be possible to optimise the column configuration even further by decreasing the number of heat integrated stages and by increasing the volumetric thermal load but research is ongoing with regard to this. It is also important to note that the results obtained were purely based on one experience with conventional packed columns so further optimisation of the performance through adjustment of the internals is required. It was also noted that in order to achieve this development of design models would be useful (Krikken et al, 2012.) 2.12 Other Noteworthy Techniques Other techniques worth mentioning but are not explored in detail here are the inter-coupled column, concentric HIDiC, the fractionating heat-exchanger (all outlined by Jana, 2009,) control systems for heat integrated distillation systems with a multicomponent stream (Amidpour et al. 2012) and membrane distillation system using heat exchanger networks (Lu et al. 2012.) 3 Industrial Applications 3.1 Using i-HIDiC to Separate a Close-boiling Mixture It has already been proven that HIDiC can be superior in terms of energy savings when compared to other thermally coupled and conventional distillation columns. In an attempt to broaden the application of the ideal integration concept the economical and operational feasibility of the i-HIDiC scheme has been explored for the use in separating components of a close-boiling multicomponent mixture. It was found to be possible to employ two ideal HIDiCs to separate a hypothetical close boiling ternary mixture and two options of a direct and indirect sequence have been considered just as with its conventional equivalent. It has been previously found that it possible to achieve 30% to 50% energy savings for the separation of two close-boiling mixtures using a HIDiC (Iwakabe et al, 2006.) However it was then found that the ideal HIDiC system is even more thermodynamically efficient than a conventional distillation system (Huang et al, 2007.) Huang et al. (2007) found a process that was conducted with minimization of the total annual cost in mind. They analysed the closed-loop controllability for the ternary mixture separation using the i-HIDiC and the intensified i-HIDiC. Upon comparison it was shown that the intensified i-HIDiC showed worse closed loop control performance with large overshoots and a longer settling out time due to the positive feedback mechanism that is involved within the intensified structure. 3.2 Heat-integrated Extractive Distillation It is not possible to separate a binary mixture which has a very low value of relative volatility as the two components will evaporate at almost the same temperature and at a similar rate. For such cases extractive distillation can be utilised where a third components called solvent (which is a high boiling and relatively non-volatile component) is added in order to alter the relative volatility of the original feed components. It has previously been investigated as to the effectiveness and operation feasibility of several energy-integrated extractive distillation technologies including the divided-wall column, Petlyuk column and heat-integrated extractive distillation scheme (Abushwireb et al, 2007.) The work included a comparison between energy-integrated extractive distillation columns and conventional extractive distillation technique based on the recovery of aromatics from pyrolysis gasoline using a solvent called  N-methylpyrolidone. The optimum design was found through using a minimal total annual cost as the objective function. The conclusion of the study was that the designed extractive distillation schemes should meet all expectations in terms of energy consumption and purity of cuts. It was shown that the heat-integrated extractive distillation configuration is the preferred option ahead of the Petlyuk column, divided-wall column and conventional column. 3.3 Separating Close-boiling Mixtures using Heat Integrated Pressure-swing Distillation Three commonly used techniques for fractionating a binary close-boiling mixture are azeotropic distillation, extractive distillation and pressure swing distillation (PSD.) The first two techniques require a third component called a solvent that enhances the relative volatility of the components that are to be separated. This can lead to certain drawbacks such as the solvent never being completely removed thus adding impurity to the products, the cost of solvent recovery, the loss of solvent and potential environmental concerns (Treybal, 1980.) These potential issues with using a solvent have allowed the PSD approach to emerge as an attractive alternative option. An important prerequisite for the use of a PSD column is that the azeotrope separate has to be pressure sensitive. Here you have a low pressure (LP) distillation column and high pressure (HP) distillation column that are combined to avoid the azeotropic point. The inclusion of the HP and LP columns in the PSD configuration allows for the possibility of heat integration to be explored. Two appropriate types of energy integration for PSD processes were shown by K. Huang et al. (2008.) The first is the condenser/reboiler type heat integration where the condenser of the HP distillation column is integrated with the reboiler of the LP distillation process. The other option is the stripping/rectifying section type heat integration where the stripping section of the LP distillation unit is coupled with the HP distillation units rectifying section. It was found that for se parating close-boiling mixtures the best option is the latter while for other types of mixtures the reverse is actually true. However it was clear that both types of heat integrated PSD column have potential for large energy savings when separating close-boiling mixtures. Yu et al. (2012) also developed a new method for separating methyal/methanol using PSD. There it was found that the fully heat-integrated pressure swing distillation process had lower costs due its energy saving capabilities. 3.4 Heat integrated Cryogenic Distillation Cryogenic distillation columns will generally operate at extremely low temperatures. An example of this the process of separating air into its basic components where the process will run at about 100K (Mandler, JA.et al. 1989.) This temperature is low enough that oxygen and nitrogen will be in their liquid state and can consequently be separated in the column. The cryogenic separation unit has a highly costly installation arranged with the condenser if the overhead vapour is meant to covert to liquid phase as the overhead vapour is enriched with more volatile component which has a very low boiling point. The heat integration principle can be used by coupling the reboiler and condenser in the cryogenic distillation unit in order to reduce this high energy cost. The energy that is expelled in the condenser can then be utilised in the reboiler. A heat integrated cryogenic distillation column (HICDiC) that is constructed with two smaller c

As Long as Grass Grows or Water Runs Questions

Zinn Chapter 7: As Long as Grass Grows or Water Runs Questions 1. Chapter 7 deals immensely with the Native Americans and their survival based upon the government taking their lands. 2. Zinn showed the impact of the Indian removal by talking about the book Fathers and Children, which shows statistics of the matter. 3. When Thomas Jefferson was Secretary of State, he believed that the Indians should just be left alone. Once he became president, he wanted to remove the Indians. I believe he did this because he wanted to gain popularity.4. Andrew Jackson’s early political/military career foreshadowed his Indian policies as President because he was always was a tough and violent guy and hated the Indians since day one. Now, as president, he fully was pro-Indian removal and supported the bill to remove Indians.5. Zinn, unlike traditional histories, believes that it was no just a war against Great Britain for survival, but essentially a war for land to expand the country.6. Zinn’s view of Arthur Schlesinger’s The Age of Jackson and Marvin Meyers’ The Jackson Persuasion is that the books concentrate more on his political and economic accounts, not on his years battling the Indians. Both books make Jackson look like the good man; they don’t mention anything about him owning slaves and other heinous truths about him.7. Cherokees desired to fit into society. They began owning slaves an adopted Christianity as their religion.8. The purpose of Zinn stating that Jackson was declaring states’ rights for Georgia on the Cherokee question but attacking South Carolinas right to to nullify a federal tariff to show that Jackson wanted to stay popular9. The Trail of Tears was the removal of the Cherokee Indians by the government, from Georgia to Oklahoma.10. The significance of the phrase â€Å"As long as grass grows or water runs† means basically that it’ll never happen. Jackson had used this phrase on the Indians. He said that the Indians could have their land and that no settlers would steal it from them, but Jackson had lied to the Indians because there land was still taken.

Pride And Prejudice By Jane Austen - 981 Words

â€Å"Pride and Prejudice† by Jane Austen is a satire novel from 1813. The story is about a couple named the Bennets who try to get their five daughters to marry kind and rich gentlemen. The main characters however are the Bennets’ second and headstrong daughter Elizabeth and Fitzwilliam Darcy, her aristocratic suitor. Throughout the entire novel, the two lovers must overcome pride and prejudice before â€Å"love can bring the novel to its magnificent conclusion†. During the novel, there are two marriage proposals between Darcy and Collins, Mr. Bennets’ cousin, which are both for Elizabeth. Both proposals have similarities but also have many differences. Mr. Collins and Darcy’s proposals are similar in three ways: They both are ill-timed; they are both ridiculous, and Elizabeth rejects both of them. The first reason Mr. Collins and Darcy’s proposals are similar is that they both are ill-timed. When Collins proposes to Elizabeth, it is right after she finishes breakfast with her sisters and before she can do anything else to make herself more presentable. (Austen, Jane. Pride and Prejudice. 3rd ed .Vol. 1.Ch.19 New York: Norton, 2001. Print.) When Darcy proposes to Elizabeth, she is suffering a headache after she finds out that he was the one who separated her sister Jane and her husband Bingley and blurts out the proposal without any sympathy for her health. (Austen, Jane. Pride and Prejudice. 3rd ed. Vol. 2. Ch. 11 New York: Norton, 2001. Print.) The second reason Mr. Collins andShow MoreRelatedPride And Prejudice By Jane Austen Essay1724 Words   |  7 PagesThe 18th century novel, Pride and Prejudice, by Jane Austen, is a fascinating book about a young woman’s struggle with family and love. Pride and Prejudice was originally published in 1813, but, the most common version of the story, and the one used for this research, is from the version published in 1892, still by only Jane Austen, though many other authors have contributed to this book over time. Austen often references the class system at the time, often noting one of the multiple heroine’s struggleRead MorePride And Prejudice By Jane Austen1467 Words   |  6 Pages Pride and Prejudice by Jane Austen is a classic novel that has remained relevant even years after its release. Its themes and symbols are understandable to even the most modern of reader. One of the many themes is sisterhood, something that is focused on constantly throughout the novel. El izabeth Bennet, the protagonist of the novel, finds many of her decisions to be based upon the actions of her sisters. Making sisterhood a main driving force. Whether they are confiding in each other for marriageRead MorePride And Prejudice By Jane Austen872 Words   |  4 PagesIn my personal cherished novel, Pride and Prejudice by Jane Austen, the worlds of two immensely divergent people display the marxist idea of the importance of social status and its affect on the people. The two main characters seem to be on opposite ends of the earth in terms of an affluent Mr. Darcy being so privileged while on the contrary, Miss Elizabeth Bennet is of a lower class. Throughout the novel, there is a fine distinction between their clashing opinions and actions that are highly influencedRead MorePride And Prejudice By Jane Austen Essay1711 Words   |  7 Pageshe 18th century novel, Pride and Prejudice, by Jane Austen, is a fascinating book about a young woman’s struggle with family and love. Pride and Prejudice was originally published in 1813, but, the most common version of the story, and the one used for this research, is from the version published in 1892, still by only Jane Austen, though many other authors have contributed to this book over time. Austen often references the class system at the time, often noting one of the multiple heroine’s struggleRead MorePride And Prejudice By Jane Austen1285 Words   |  6 PagesPride and Prejudice Analysis I.Introduction Jane Austen wrote her novels during the time period known as the Regency. The Enlightenment and the Age of Reason, a time where ideas like democracy, secularism, and the rise of developing sciences were making their way across Europe had come to an end.It was replaced with the wave of horror that was the French Revolution, a once minor revolt that escalated into a violent war, concluding with the rise of Napoleon, which whom England fought against the majorityRead MorePride And Prejudice By Jane Austen1384 Words   |  6 PagesNicole Voyatzis Professor W. Acres HISTORY 1401E May 26, 2015 Discussion Paper - Pride and Prejudice Pride and Prejudice written in 1813 by Jane Austen tells the story of The Bennet’s and their five unmarried daughters. The family live as part of the lower gentry in early 19th century England. With that being said, Mrs. Bennet’s primary focus in life is to ensure that all her daughters are married, preferably to wealthy men. The book begins with Mrs. Bennet seeing an opportunity for her daughtersRead MorePride And Prejudice By Jane Austen1570 Words   |  7 PagesThe comical novel Pride and Prejudice by Jane Austen depicts the love life of women in the early 1800’s. Austen shows the hardships young women in that time period had to go threw to find their place in this world. Women were thought of as objects to the men, they were supposed to be stay at home mothers, or simple just a accessory to their partner. Women were the subordinates in life, as they still are today. Austen tells the story of how Mrs. Bennet (a mother of 5) works tirelessly to get her daughte rsRead MoreJane Austen: Pride and Prejudice 1086 Words   |  5 PagesJane Austen, born December 16, 1775, was an English novelist whose works of romantic fiction earned her a place as one of the most widely read authors in English literature. Austen’s novels critique the life of the second half of the eighteenth century and are part of the transition to nineteenth-century realism. Though her novels were by no means autobiographical, her fictional characters do shed light on the facts of her life and but more importantly, they offered aspiring writers a model of howRead MorePride And Prejudice By Jane Austen914 Words   |  4 Pages Bell 1 Natalie Bell Pedersen English 4 honors 29 February 2016 Pride and Prejudice Essay Jane Austen s novel, Pride and Prejudice, focuses on the social conflicts of England during the 1800s. Elizabeth Bennet and Mr. Darcy fall in love, and face social criticism. Mr. Darcy struggles with the ideology of societal expectations while falling in love with Elizabeth Bennet. After persistent self-reflection, Mr. Darcy overcomes the stereotype of whom he should marry, and marries ElizabethRead More Pride and Prejudice by Jane Austen 1104 Words   |  5 Pagesrate of over 50% from 1970-2010. However, during the eighteenth and nineteenth centuries, marriage was often one of the few choices for a woman’s occupation. Reading Pride and Prejudice by Jane Austen from the twenty-first century perspective might make some matters that are stressed in the book seem dated or trivial. As Pride and Prejudice was set sometime during the Napoleonic Wars, it is only fitting that finding a proper marriage is on the minds of many of the women in the book. Marriage and marrying

Bill Gates The Computer Industry - 1351 Words

Bill Gates is worth about 79.2 Billion US dollars, at his peak 101 Billion US dollars. Bill Gates is a computer programmer, entrepreneur who took the computer industry by storm. He formed the company Microsoft and made it a leading computer corporation within ten years of opening for business. Bill Gates later stopped working full time at Microsoft and focused on his Foundation called Bill and Melinda Gates Foundation. Bill Gates is an amazing and interesting person to know about. Bill Gates was born to a lawyer and a teacher. He was born on October 28, 1955. He grew up in an upper-middle class family and had one older sister and one younger sister. He excelled in games such as Monopoly and Risk. Around the age 13, Bill Gates grew fond of computers and what they can do. This happened due to a Seattle computer company giving computer time to his school. Later on, he met Paul Allen where they became the bests of friends. Though they were both quite remarkably different, such as Paul be ing shy and reserved while Bill was fierce and combative at times, they both shared the same interests in computers. Around age 15, the two of them started using the computer glitches in the computers to their advantage. They later were caught and were banned from the computer labs for a while. After the ban they offered to debug the program in return for computer time. Later, Paul and Bill created a program that monitored traffic patterns in Seattle which netted about 20,000 dollars. BillShow MoreRelatedBill Gates : The World s Prime Software Business1606 Words   |  7 Pages William Henry Gates; who is well known as Bill Gates was born on 28th of Oct, 1955, in Washington. In age of 13 Gates started showing curiosity in computer programming when he was at Lakeside school and pursued his passion through college. Striking out on his own with his friend and business partner Paul Allen, Gates found himself at the right place at the right time. Through technological modernization, strong business strategy and aggressive business tactics, he built the world s prime softwareRead More Bill Gates Essay1359 Words   |  6 PagesBill Gates William Henry Gates, III was born October 28, 1955 in Seattle, Washington. He was the middle child of three born to William and Mary Gates. ATrey,@ as he was called because of the III, was sent to a private school by his father, a lawyer, and mother, a former teacher now on several prestigous boards (Moritz, 238). At age 13, Bill had completely taught himself programming after taking a computer studies class. After scoring a perfect 800 on the mathematics half of the SAT, he graduatedRead MoreBill Gates Essay1325 Words   |  6 PagesBill Gates We read books for a number of reasons but usually because we want to or we have to. When you pick up a book it falls into one of three types, dependent on whether it is a want to or a have to type of book. First theres the kind of book you pick up and like the look of but then the first chapter is so bad that you have to put it down because you are either too confused by the plot or you discover it has been written in some obscure untranslatable language. The second type is whereRead MoreBill Gates and How the World Was Effected by His Accomplishments1203 Words   |  5 PagesBill Gates How he effected the world with his accomplishments William Bill Gates III was born on October 28, 1955. He accomplished many unbelievable things, and highly influenced the people around him in many ways. In University, Bill Gates was known to be the smart computer nerd, who totally amazed all of his friends with his knowledge. One of the people that he had influenced the most was Steve Ballmer, current Microsoft s Chief Executive Officer, whose room was down the hall from BillRead MoreBill Gates and Tim Berners-Lee: Their Contributions to Information Technology and the IT Industry1671 Words   |  7 PagesBill Gates and Tim Berners-Lee: Their Contributions to Information Technology and the IT Industry Nowadays, information technology is playing a significant role in human’s life. Actually, it has only been developing for several decades. In fact, there are two key men who contribute greatly for this process. They are Bill Gates and Tim Berners-Lee. This essay will explain their contribution to IT and its industry and discuss it in several aspects. There remain several differences betweenRead MoreBill Gates and Microsoft1662 Words   |  7 PagesBill Gates and Microsoft â€Å"Microsoft was founded based on my vision of a personal computer on every desk and in every home, all running Microsoft software,† Bill Gates once remarked (Stevenson). Everyone has their own dream but this was Bill Gates dream when he first co-founded Microsoft. This dream came to haunt him 12 years later when he was caught. Microsoft was charged with using its power to eliminate its competitor in the Web-browser market in the mid-90s (Stevenson). Bill Gates’ dreamsRead MoreEssay about Bill Gates869 Words   |  4 PagesBill Gates William Henry Gates, also known as â€Å"Bill†, has established himself as the richest man in the world. He is the youngest self made billionaire, and perhaps the best businessman in the world. As you read along, you will learn what Bill Gates’ accomplishments were, what his beliefs were, and why this topic is so important. Bill Gates is important because not only did he change the computer technology in America, he also became the biggest, strongest, richest and the most powerful companyRead More Bill Gates and how the world was effected by his accomplishments1166 Words   |  5 Pages Bill Gates How he effected the world with his accomplishments nbsp;nbsp;nbsp;nbsp;nbsp;William Bill Gates III was born on October 28, 1955. He accomplished many unbelievable things, and highly influenced the people around him in many ways. nbsp;nbsp;nbsp;nbsp;nbsp;In University, Bill Gates was known to be the â€Å"smart computer nerd,† who totally amazed all of his friends with his knowledge. One of the people that he had influenced the most was Steve Ballmer, current Microsoft’s Chief ExecutiveRead MoreEssay about Steve Jobs of Apple and Bill Gates of Microsoft554 Words   |  3 Pagesbest know as the co-founder CEO of Apple Computer and somewhat less so for his leadership of Pixar which is a computer animation studio. On the other hand, Bill Gates (born in Seattle, Washington on the 28th of October 1955) is married to Melinda French Gates and has three children. Bill Gates is the co-founder and current Chairman and Chief Software Architect of Microsoft. Both started their careers almost at the same time and within the same industry. They are without a doubt two of the most successfulRead MoreHow Bill Gates Siezed his Dreams1399 Words   |  6 Pages The founder of Microsoft, the world’s large st personal-computer software company, found interest in computers and the way they worked at a very young age. As a high school student, he was able to accomplish many feats on some rudimentary machines that pale in comparison to what he would come to develop. The friends he possessed throughout his learning stage have stayed with him to create an empire in the computer software industry. This man excelled at school, but seized his dream of starting his

Breast Cancer The Second Most Common Cancer - 1403 Words

In the United States, breast cancer is the second most common cancer in women. Although it can occur in both men and women, it is very rare in men. An individual’s breast has many components. It contains glands, ducts and breast tissue that contains fat, connective tissue, lymph nodes and blood vessels. The most common type of breast cancer in the U.S. is ducts carcinoma. This type of cancer begins within the cells of the ducts, but it can also begin in the cells of the lobules and other tissues of the breast. There are five stages of breast cancer. The stages are dependent on the tumor size, lymph node status and metastases. The progression of the cancer tends to be consistent and predictable. When cancer is left untreated, it will†¦show more content†¦Typically, individuals at this stage are about 52 years old. Stage two breast cancer has many subcategories. The tumor is typical 2 cm in diameter or less, but the cancer cells have already metaswized to the lymph nod es. A breast tumor that is larger than 5 cm, and had not spread to the lymph nodes is also considered stage 2 breast cancer. Stage three breast cancer is often referred to as a â€Å"locally advanced† breast cancer. At this stage, the primary tumor is greater than 5 cm in diameter, and has no apparent metastasis, or the tumor is is between 2-5 cm, with evidence of rather significant metastasis. Another way that stage three breast cancer can be looked at is that an individual with either have a large but operable breast cancer, or a medium sized tumor that is difficult to treat with surgery alone. Many times, the cancer will invade a muscles, or attach to major arteries, nerve trunks or veins in an individual’s body, which therefore makes them impossible to surgically remove completely from the body. Stage four or â€Å"advanced stage† breast cancers â€Å"indicate the presence of distant metastasis to other parts of the body, such as the liver or bones† ( Halls 2015). The prognosis for stage four breast cancers is very low, often being 16-20%. These breast cancers may be recurrences following an individual’s initial treatment. Bone scans, chest Xrays, CAT scans, MRIs, and blood tests may be used to check for metastasis† (Halls 2015). Often times

Good Country People Free Essays

In the short story â€Å"Good Country People,† Flannery O’Connor utilizes the characters Joy Hopewell and Manley Pointer to expose how believing in nothing makes a person isolated and spiritually empty. Joy Hopewell is a well-educated, thirty-two year old atheist with an artificial leg. Joy’s lack of belief causes her to lose all the human civility and decency she has. We will write a custom essay sample on Good Country People or any similar topic only for you Order Now She even changes her name to Hulga. Flannery O’Connor’s use of the mythological Trickster persona to seek, attract, and repulse the protagonist Joy-Hulga leads to her spiritual enlightenment. Manley Pointer through the Trickster persona seeks out the Hopewells, specifically Hulga. From the beginning the Bible salesman uses the svelte and persuasive words used by the Trickster. Pointer maneuvers himself inside when he tells Mrs. Hopewell, â€Å"Lady, I’ve come to speak of serious things. † He continues, using her own thoughts and feelings to manipulate her, telling her, â€Å"I know you believe in Chrustian service† and â€Å"People like you don’t like to fool with country people like me. † The Trickster knows that Mrs. Hopewell is just being polite, but he persists, taking advantage of her desire to avoid all conflict and her love of â€Å"good country people. † Manley craftily gets himself invited to dinner out of sympathy. Knowing that Joy-Hulga has a heart condition, the Trickster deceives Mrs. Hopewell by telling her, â€Å"I got this heart condition. I may not live long. When you know it’s something wrong with you and you may not live long, well then, lady†¦Ã¢â‚¬  Through deceit and smooth talking, Pointer guarantees he’ll spend the evening at the Hopewell’s home. The Trickster has found his way inside and can now focus on his target Hulga. The Trickster has found his target and continues to use his mythological persona to attract Joy/Hulga. Pointer uses his silver tongue to convince disagreeable Hulga to accompany him on a picnic the next day. The con-artist tells Hulga, â€Å"I think you’re brave. I think you’re real sweet† and then later asks her, â€Å"Don’t you think some people was meant to meet on account of what all they got in common and all? Like they both think serious thoughts and all? † Manley is establishing a connection between Hulga and himself to make himself seem more attractive. Manley Pointer further personifies the mythological Trickster persona when he shows up the next day for their picnic in a broad-rimmed hat, and he’s also described as very tall, â€Å"Then suddenly he stood up, very tall, from behind a bush on the opposite embankment. Smiling, he lifted his hat which was new and wide-brimmed. † These are two physical traits of the mythological Trickster persona. As they reach the barn, Pointer tricks Hulga and baits her into climbing up to the second floor where the climax of the story occurs. The Trickster fools Hulga by acting innocently as he â€Å"pointed up the ladder that led into the loft and said, ‘It’s too bad we can’t go up there,’† implying that she can’t do it because of her handicap, so she quickly proves him wrong. Hulga’s pride and feeling of superior intellect blind her from seeing that she’s being duped by the Trickster. Flannery O’Connor uses the Trickster persona to repulse the protagonist bringing her to spiritual enlightenment. After Manley Pointer lures Hulga up into the loft of the barn, he becomes more demanding, using Hulga’s feelings for him to manipulate her into giving him what he wants, he says, â€Å"’I known it,’ he muttered, sitting up. ‘You’re just playing me for a sucker. † The Trickster starts to show his true character more and more now that he has Hulga where he wants her. Manley manipulates Hulga into giving him her fake leg which symbolizes Hulga/Joy’s soul. As the Trickster takes Hulga’s leg, he starts to bring her back into the light and give her a new start. You see it happening when Hulga says, â€Å"When after a minute, she said in a hoarse high voice, ‘All right,’ it was like surrendering to him completely. It was like losing her own life and finding it again , miraculously, in his. † Pointer takes Hulga’s leg and leaves her there stranded in the loft to ponder her new spiritual enlightenment. Flannery O’Connor uses the Trickster persona to seek, attract, and repulse the protagonist, thus bringing her new enlightenment on her life. Hulga/Joy had lost all human civility and decency in her life using her intellect as an excuse. As Hulga sits in the loft, she is finally forced to realize the error in her ways. How to cite Good Country People, Papers

Jurisdictional Error in the Malhi vs. Minister

Question: Discuss about the Jurisdictional Error in the Malhi vs. Minister for Education Anor. Answer: The applicant in this case was Mr. Amanpreet Singh Malhi who sought a review of the decision that was made by the Migration Review Tribunal. The tribunal had earlier affirmed the decision by the delegate of the minister to deny the applicant a class BS visa under section 65 of the Migration Act 1958. The applicant was required to satisfy cl801.221 of sch.2 of the Migration regulations at the time of the visa application[1]. These regulations required the applicant of the visa to be a spouse of the sponsor whereby the sponsor must be an Australian citizen and must satisfy section 5F of the Act. Section 5F of the Act, states that a person is someones spouse if he/she is in a married relationship. Such persons must have a mutual commitment to a shared life as wife and husband to the exclusion of other persons and the relationship between them should be genuine and continuing[2]. Amanpreet Singh was a male Indian citizen who applied for a partner visa in October 2011 based on his marriage to Ms Teresa Bartlett. He was 26 years old while his sponsor was 52 years of age. Having been denied the visa by the delegate of the minister, she proceeded to the tribunal to review an earlier decision made against him. The tribunal requested that the applicant submit number of documents such as the identity certificates and police clearance certificates. In addition, he was supposed to submit utility invoices, bank statements, travel documents, receipts, a letter from Australian Electoral commission, photographs, greeting cards, and personal statement for the applicant and that of the sponsor. The tribunal made a decision on the matter after considering the applicants relationship with the sponsor based on the following g subheadings. The first consideration was the financial aspects of the relationship between the applicant and the sponsor. Similarly, they considered the nature of the household by checking the financial contributions of the applicant in the household. They were convinced that the applicant had contributed immensely in the payment of utility bills but dismally in the purchase of furniture. There was an indication that all the furniture were purchased by the sponsor. The tribunal also considered the social aspects of the relationship and found out that both the applicant and sponsors parents did not attend the wedding. In that regard, the tribunal formed a view that the two rushed to do a marriage which was to a greater extent not recognized by their respective families. In arriving to their decision, the tribunal delved into the nature of the commitment by the parties. The tribunal explored the aspect of commitment disavowing the age difference between the two as a factor that would deny them a genuine and a continuing spousal relationship[3]. It was persuaded that the couple had a meaningful discussion regarding how they may not have biological children and take credible steps into having one though medical attention or adoption. However, the tribunal was concerned with the applicants decision to enter into a marriage so hastily without having his applicants status being resolved[4]. Similarly, it was concerned about the sponsors decision to enter into a marriage with all the complexities of being in a troubled relationship previously. Considering these concerns, the tribunal did not see it a genuine and a continuing spousal relationship hence they confirmed the earlier decision by the delegate of the minister to deny the applicant the visa. After all the submissions had been done by both the applicant, the delegate of the minister and the tribunal before the Federal Circuit Court, a judicial review was done and the Court was satisfied that the tribunal had engaged in a deliberate and systematic jurisdictional error by failing to undertake their statutory task of satisfying itself whether the relationship between the parties was genuine and continuing as a mandatory condition in line with subsection 5F(2) of the Act[5]. The court asserted that the disavowal of the couples lack of children does not mean that their relationship was not genuine and continuing was a clear indication that the parties had a meaningful discussion that their relationship and discussion of the parties at the commencement of their relationship. For instance, the tribunal argued that if the parties had a genuine and a mutual goal of having a family in future, they would have sought medical advice about the prospects of having children[6]. This clea rly shows that the tribunal was hell-bent on relying on the circumstances surrounding the inception of the relationship including incapacity to bear children as the reason to doubt the genuineness of the couples relationship. Bibliography Malhi v Minister for Immigration Anor. FCCA 119 ( Federal Circuit Court of Australia, February 2, 2017). Neilson, Mary, and Matthew Collins. Going to Live in Australia: Your Practical Guide to Beginning A New Life Down Under. Kidlington, UK: How To Books Ltd, 2004. Commonwealth consolidated regulations. MIGRATION ACT 1958 . Law, Melbourne: Commonwealth, 1958. Spirov, Andrea. Moving to Australia: A Guide for Expats, Lovers and the Otherwise Curious. Brisbane: CreateSpace Independent Publishing Platform, 2013. Veltman, Laura. Living Working in Australia: Everything You Need to Know for Building a New Life. Kidlington, UK: How To Books Ltd, 2000. Vrachnas, John, Mirko Bagaric, Penny Dimopoulos, and Athula Pathinayake. Migration and Refugee Law: Principles and Practice in Australia. Cambridge: Cambridge University Press, 2011. Malhi v Minister for Immigration Anor. FCCA 119 ( Federal Circuit Court of Australia, February 2, 2017). Commonwealth consolidated regulations. MIGRATION ACT 1958 . Law, Melbourne: Commonwealth, 1958. Neilson, Mary, and Matthew Collins. Going to Live in Australia: Your Practical Guide to Beginning A New Life Down Under. Kidlington, UK: How To Books Ltd, 2004. Vrachnas, John, Mirko Bagaric, Penny Dimopoulos, and Athula Pathinayake. Migration and Refugee Law: Principles and Practice in Australia. Cambridge: Cambridge University Press, 2011. Veltman, Laura. Living Working in Australia: Everything You Need to Know for Building a New Life. Kidlington, UK: How To Books Ltd, 2000. Spirov, Andrea. Moving to Australia: A Guide for Expats, Lovers and the Otherwise Curious. Brisbane: CreateSpace Independent Publishing Platform, 2013.