Karla Homolka English Research Paper Example | Topics and Well Written Essays - 1500 words

Karla Homolka English - Research Paper Example With both of them participating in the murders, the role of Karla Homolka in the crimes was figured out vaguely, as there were differences of opinion regarding her contribution to those murders. This paper will chronicle her life starting from her early years, her marriage to Paul Benardo, rape and murder of the girls, finishing with the investigation, conviction and her eventual release. Early life Karla Homolka was born to Dorothy and Karel Homolka in 1970 as the eldest of three daughters in the Canadian town of Port Credit, Ontario. She went to Sir Winston Churchill Secondary School and even while going to the school, Karla worked as a part-time employee at a local pet shop. She graduated in the year 1988, and got employment as a veterinary assistant in Thorold Veterinary Clinic in Ontario. She did a similar job at the Mardinale Animal Clinic as well. â€Å"Karla developed a passion for animals and after high school she went to work at a veterinary clinic† (Montaldo). Thus, when one focuses on Karla’s early life, it appears that she lived a normal life, without exhibiting any negative or even psychotic tendencies. However, it all started to change when he married Paul Bernado. Marriage to Paul Bernado Karla as part of her job attended a pet convention in Toronto in the spring of 1987. During that visit, Karla, just 17 at that time, met 23-year-old Paul Bernardo in a â€Å"suburban hotel restaurant outside of Toronto and she fell for Paul, immediately.† (biography.com). They had sex on their first meeting and as their relationship started to develop, they â€Å"discovered that they shared the same sado-masochistic desires,† (Montaldo). Because of this ‘extremity’ in their relationship, Paul assumed the role of a ‘master’, with Karla willingly assuming the role of a ‘slave’, who has no problems in fulfilling her husband’s extreme fantasies. One of these extreme ‘fantasies’ o nly leads to their first murder - the murder of Karla’s own younger sister, Tammy Homolka. Rape and the murders Three years into their relationship, Paul starts to become obsessed with Tammy and to abuse her, he gets Karla’s help. One of Paul's constant complaints with Karla was that she was not a ‘virgin’ when they met and so she becomes ‘devoted’ to pleasing Paul in every way possible. (Montaldo). Using this weakness of Karla, Paul openly expressed his feelings for Tammy, and also convinces Karla to aid him in raping her. â€Å"It was, therefore, from his point of view, her responsibility to make it possible for Paul to take the virginity of†¦Tammy without her knowledge or consent.† (Bardsley). Karla wrongly accepts this flawed logic, and decides to make or force Tammy into being a sort of ‘surrogate virgin’ for her. In their first attempt in July 1990, Karla serves Tammy, a spaghetti dinner mixed with heavy doses of Valium, which was stolen from her workplace. â€Å"Bernardo rapes Tammy for about a minute before she starts to wake up† and so they temporarily abandon their plan then, waiting for another opportunity. ("Key events in the Bernardo/Homolka case"). Then, six months before their marriage, at a Christmas party at Karla parent’s house, Karla first mixes sedative Halcyon in the alcoholic drinks of Tammy. After the party was over and family members retired, the husband and wife duo took Tammy to the basement, with Karla holding a cloth soaked with Halothane over Tammy's mouth. (Becker, 2005). There, Paul with Karla

Nonprofit Reflection Questions 2,3+4 Coursework

Nonprofit Reflection Questions 2,3+4 - Coursework Example e even though succession planning isn’t highlighted as something extremely important, but it does impact an organization a great deal since it affects financial returns. And stakeholders need an assurance that wherever they invest, they will be secure, not only in the short run but also in the long run. For example, Apple with the demise of Steve Jobs has no successor, and therefore its stocks have come down to 5% simply because of the fact that Steve Jobs was great when he was here, however investors feel insecure about the company due to the fact that there is not successor to Steve Jobs. Apple could have saved itself the trouble of plummeting stocks if it had invested in succession planning. And this succession planning could similarly be for any other employee and not just a leader. For succession planning, an organization should realize that it is something that requires devotion and commitment from all levels in the organization, regardless of the hierarchy or flatness of its structure. It is also essential to be abreast with the talent in one’s organization and keep a record so that they can be honed into whenever the need may be. At the same time, it isn’t an activity that is just performed outright; all the potential employees as well as the shareholders need to be kept informed about the plan so that they can aspire to be in particular post. And it isn’t a once in a year activity that the organization performs but rather an ongoing activity that must be done and polished and repeated so that the perfect person can fill in the perfect shoes. A great deal of anxiety and stress can be avoided before-hand if this process is conducted before the need falls. This is because leaders can retire or expire unexpectedly, and the market is full of fluctuations and any change can occur without anticipation and the company can be left in dismay. This is where succession planning helps the organization. And it is the duty of the board to act for the company

Why study Chemical and Biological Engineering Essay Example for Free

Why study Chemical and Biological Engineering Essay Engineering combines quantitative analysis and synthesis to elucidate system design principles. Through the genomics revolution engineers can now begin to tackle biological problems using the same measure, model, and manipulate approach they have applied to physics and chemistry. Indeed, applying this system approach is widely recognised as essential not only for the development of innovative biotechnologies but also to yield fundamental scientific understanding of biological systems. As our ability to modify and control biological systems increases, biological processes will replace chemical and mechanical processes due to their inherent advantages of renewable resources, mild operation conditions and minimal waste problems. Early signs of the change are seen not only in the high-value pharmaceutical industry, but also in the production of bulk chemicals like lysine by fermentation and in bioleaching of copper and gold from mineral ore. Advances in our understanding of and ability to mimic biological systems are also inspiring completely new approaches such as nanotechnology and tissue engineering, which will form the foundation of new industries of the 21st century. Chemical biology is a scientific discipline spanning the fields of chemistry and biology. It involves the application of chemical techniques and tools, often compounds produced through synthetic chemistry, to the study and manipulation of biological systems. Chemical biologists attempt to use chemical principles to modulate systems to either investigate the underlying biology or create new function. Research done by chemical biologists is often closer related to that of cell biology than biochemistry. Biochemists study of the chemistry of biomolecules and regulation of biochemical pathways within cells and tissues, e. g. cAMP or cGMP, while chemical biologists deal with novel chemical compounds applied to biology. Pharmacology researches the effect of highly selective chemical compounds on cells, tissues, organs and organisms. Toxicology researches the adverse effect of highly selective chemical compounds on cells, tissues, organs and organisms. In the field of drug discovery, hit identification is the screening of chemical libraries of small molecules in biological systems such ascell lines or whole animals to identify compounds that cause a desirable change in phenotype. [1] This strategy which employsphenotypic screening to identify starting points for drug discovery is also known as classical pharmacology,[2] forward pharmacology,[3]or phenotypic drug discovery (PDD). [4] In ecology, you study the relationships among organisms. You look at past, present, and future environments. You examine factors such as population size, pollutants, rainfall, temperature, and altitude. You study various environments oceans, deserts, forests, and grasslands and the dynamics of each habitat. You learn about plants, animals, birds, fish, and humans. You also learn about natural predators and how species compete for food, water, and shelter. This program requires a broad background in the life and natural sciences. The study of ecology enables you to contribute to our understanding and preservation of the natural world. Some community colleges offer a two-year program in this field. With this preparation, you can work as a field crewmember, technical assistant, or lab technician. Pharmacology is the branch of medicine andbiology concerned with the study of drug action,[1] where a drug can be broadly defined as any man-made, natural, or endogenous (within the body) molecule which exerts a biochemical and/or physiological effect on the cell, tissue, organ, or organism. More specifically, it is the study of the interactions that occur between a living organism and chemi cals that affect normal or abnormal biochemical function. If substances have medicinalproperties, they are considered pharmaceuticals. Astronomy The natural world beyond the earth Astrophysics All physics required to understand astronomical phenomena (includes elements of nearly all fields of physics) Cosmology The universe: its origin, structure, and evolution on the largest possible scale Cosmogony The origin of the universe (and sometimes the solar system), is a subfield of cosmology Astrochemistry All chemistry required to understand astronomical phenomena (primarily the chemistry of the interstellar medium and protostellar accretion disks) Space Science The physics of the interplanetary medium Planetary Science The physics of planets, their formation, structure and evolution Astrology The purported relationships between the planetary positions at the time of a persons birth, that persons personality, and events in that persons life. A pseudoscience, has no scientific basis.

How to write a Definition Essay Essay Example for Free

How to write a Definition Essay Essay A definition essay is an essay concentrated on the explanation of the meaning of a definite term. The term may be analyzed from the position of one and only meaning and also from the position of subjectivity of the person defining the term. This classification divides the words into two groups: †¢material terms – a table, a door, a printer. †¢spiritual terms – friendship, love, honor, pride. How to write a definition essay? Read more:  How to write an outline for a cause and effect essay A good definition essay is required to have a strong thesis statement in which the point of view of the author on a certain term is revealed. Ordinarily, the term is given the general basic definition implying that the dictionary definitions must be only a start for the author’s unique definition of the term. In order to make a definition essay professionally it is necessary to find a definition of the term that corresponds to the opinion of the author. The definition is always given in own words and specifies what meaning of the term is to be analyzed. Definition essay Outline Three Tips for an effective definition essay †¢The readers should be told the defined term. †¢The presented information should be basic and clear. †¢It is necessary to use a wide range of examples to make sure the reader understand the point of view of the author. Three gold rules for writing a good definition essay †¢Ã¢â‚¬Å"When† and â€Å"where should not be used in a good definition. A noun is defined through a noun, a verb through a verb, ect. †¢The definition should never copy the dictionary definition but is supposed to be unique reflection of the author’s opinion. †¢The best way to explain the definition is to use simple language. DEFINITION ESSAY CONTINUED †¦ Structure: definition essay format The basic structure of a definitions essay consists of the thesis statement, examples to reveal the term from the necessary side and the author’s final restatement. †¢Definition is presented †¢It is analyzed by: function structure analysis †¢The meanings which are not considered by the author are specified. †¢The definition is supported with various examples. †¢The structure of the essay language must be appealing to the reader. CAUSE AND EFFECT ESSAY How to write a Cause and Effect Essay: format, structure, outline, examples, topics This type of essay is concentrated on the ability of the writer to connect the reasons the things happen and the consequences they might have. In other words it is the connection between the causes of events and the effects this cause have on any analyzed aspect. A cause and effect essay is designed to organize the discussion of the ideas of a certain topic (its causes and results). Writing a cause and effect essay In order to write a professional cause and effect essay it is necessary to understand the term casual chain or domino effect. A cause chain or a domino effect –is a chain formed of a cause producing a situation and this situation producing another situation and so on. Each situation may have various causes and effects. Nevertheless, it is suggested for students to analyze no more than three causes or effects of any situation devoting a separate paragraph for each point. Cause and effect essay structure As the situation analyzed in the cause and effect essay may have different background there are three structures that may be applied. Each situation requires only on of the three structure variants. 1 variant Multiple causes  ® one effect †¢Thesis statement (mentions the general effect of the situation mentioning three causes that lead to such an effect) Ex. Child violence is caused by lack of parental attention, parental abuse and parental immaturity. †¢First cause (a more detailed look on lack of parental attention with two minor supports) †¢Second cause (a more detailed look on parental abuse using two minor supports) †¢Third cause (a more detailed look on parental immaturity with the help of two minor supports) 2 variant One cause ® multiple effects CAUSE AND EFFECT ESSAY CONTINUED †¦ †¢Thesis statement (mentions that one factor leads to a variety of consequences). Ex. Watching violent films has a great impact on the child’s psychological and physiological condition. †¢First group of effects (psychological effects) †¢Second group of effects (physiological effects) 3 variant Causal chain (Domino effect) †¢Thesis statement (mentions the first and the last parts of the chain) Ex. Thinking about art leads to poor results in foreign language class. †¢First domino (thinking about art  ®forgot to take the medicine) †¢Second domino (without the medicine could not get enough sleep) †¢Thirst domino (being tired could not learn the home work for the foreign language class) †¢Last domino (being not ready for class gained a poor mark). COMPARE AND CONTRAST: Compare and Contrast Essay How to write a Compare and Contrast Essay: format, structure, outline, examples, topics Writing a compare and contrast essay This type of essay is basically a composition, which is concentrated on two points. The compare and contrast essay reveals the differences and the similarities of these two points, things, situations, etc. The main task of any writer is to find as many similarities and a difference, as it is possible. How to write a compare and contrast essay? In order to write a professional compare and contrast essay it is necessary to remember that it is vital to identify the points of comparison. This is a major requirement because without this proper identification the essay will not have a correct logical form. To make a detailed compare and contrast essay the first step is to point out the key aspects and do a research on the topic including articles and books. Compare and contrast essay structure The compare and contrast essay has a rather simple structure but nevertheless it is important to specify its contents: Introduction (Introduction is used to choose what will be compared and contrasted and to identify the major lines of comparison. The introduction must be very bright as it is supposed to catch the attention of the reader and make the rest of the essay appealing to the reader. One of the main secrets of any successful compare and contrast essay introduction is adding a surprising fact or an anecdote on the topic of discussion). Body a.Each of the compared points has to be presented in a separate paragraph or if it is necessary in two paragraphs. b. When all the compared points are revealed to the reader the writer is suggested to put analyze them one more time together in order to put in one solid comprehension of the essay. The paragraphs must be connected with each other with very strong topic sentences. The reader is not supposed to face any difficulties understanding the reason the material is organized the way it is. In other words the reader is expected to understand the reason the writer is analyzing these given aspects. COMPARE AND CONTRAST CONTINUED †¦ c.The body should be critically read, as each topic sentence has to clearly summarize the main point of the paragraph. d.For better result the body should be analyzed from the perspective of an independent analytic, so it should be read a day after it was written or by another trusted person for review. Conclusion (Conclusion is used to summarize the key similarities and differences of the two analyzed things. Word for word restatements should be avoided. The reader is not supposed to feel any doubt in the compare and contrast essay perspective on the topic). ARGUMENTATIVE ESSAY: How to write an Argumentative Essay: Outline, Structure, Format, Examples, Topics How to write an argumentative essay? The leading tone in an argumentative essay is the position of proving that the presented point of view is the correct one and possesses more truthful arguments than any other opinions. The author through proper reasoning, inducting and making conclusions, must prove the assertions or the theories of the argumentative essay. If the author fails to apply the reasons and conclusions to the topic of the essay such essay is considered to be an unsubstantiated opinion. Argument essay writing requires the ability of the author to show that he makes conclusions according to definite facts and not on his personal assumptions only. The idea that a theory created on a base of some sort of argument answers the question â€Å"how to write an argumentative essay†. So in reality it is the best argument essay. Argumentative essay Format Any argumentative essay needs to be written according to the following form: 1.It must begin with a clear statement and reveal the significance of the presented opinion in terms of the analyzed phenomenon. 2.In order to make the argumentative essay professional a wide range of information concerning the phenomenon should be reviewed. 3.As the reader is to â€Å"agree† with the data listed in the essay must be as reliable as possible. Structure of the argumentative essay A good argumentative essay has several paragraphs that should be concentrated on different aspects of the essay 1.Introduction (The reader is introduced to the analyzed phenomenon and the opinion is revealed through a strong thesis statement). 2.Previous attempts to solve the argument ( Are provided from literature). 3.The consequences of the problem (its negative or positive impact). 4.Repercussion of the argument in case it is not finally solved(supported with sources). 5.Connecting the argument with the provided facts. ARGUMENTATIVE ESSAY CONTINUED †¦ 6.Summary (a conclusion including main ideas and the thesis restatement). Argumentative essay outline structure A good argumentative essay has several paragraphs that should be concentrated on different aspects of the essay 1.Introduction (The reader is introduced to the analyzed phenomenon and the opinion is revealed through a strong thesis statement). 2.Previous attempts to solve the argument ( Are provided from literature). 3.The consequences of the problem (its negative or positive impact). 4.Repercussion of the argument in case it is not finally solved(supported with sources). 5.Connecting the argument with the provided facts. 6.Summary (a conclusion including main ideas and the thesis restatement). DIVIDE AND CLASSIFY ESSAY: Classification Essay How to write a Classification Essay: format, structure, outline, examples, topics Writing a classification essay This type of essay is a very specific one as it deals with the Classification of organizing the logical connections in it. The author of a classification essay is supposed to organize or sort the arguments of the essay in categories. An important thing to mention is that the categories are to fully resemble the essence of the essay’s topic. How to write a Classification essay In order to write a professional classification essay three advices should be kept in mind. First of all the organized categories are expected to fully reveal the theme of the essay and therefore must be very useful in terms of the classification Classification. In spite of the amount of the separated categories each of them must follow one logical principle. And also each of the presented categories is to provide examples. Classification essay Outline This rubric is a condensed treatment of the Classification essay writing, this Outline is just a description of the main facts and rules about how to write this type of essay. One should practice as much as possible to become good in writing a Classification essay. Classification essay structure The structure of a classification essay is built around the construction of the categories. 1.Introduction (The basic part pf the introduction is the thesis statement. The strength of the thesis statement depends on how well it reveals the topic and its classification. It is to justify the specific categories chosen for this classification). The thesis statement has a very determined logical structure: theme ® its classification ® chosen categories (the number of categories is suggested to be limited to three in order not to blur the classification). For instance: Exchange students can face three benefits: education, experience and cultural exchange. DIVISION – CLASSIFICATION ESSAY CONTINUED †¦ 1.Body †¢First category (The less important category). †¢Second category †¢Third category (The most important one and requires brighter examples). In a good classification essay each category must follow one organizing principle. The categories can be organized on the basis of forming different groups of arguments) . 1.Conclusion The conclusion is the summary of the analyzed categories and the restatement of the thesis statement. Classification essay format This type of essay like all others could be formated in MLA, Chicago/Turabian, APA, AMA. That depends on your essay topic, subject area and the assignment requeirements. Please be consistent following the one style of format of all the essay elements: Title, headings, paragraphs Text pages, Fonts, Indents, Justifications, Spacing, Page numbers, Emphasis, Footnotes, reference list etc.

Small Scale GTL (STG Plus) Plant

Small Scale GTL (STG Plus) Plant Course: Natural Gas Processing Technology (ENCH 609, Winter 2017) PROJECT TITLE GTL: Syngas to Gasoline (STG Plus) Professor: Dr. Nashaat Nassar List of figures and tables: Fig 1. Schematic sketch of the STG+ system (from Primus Green Energy TM) .. (6) Fig 2. Sensitivity Analysis for case 62.5 MMSCFD (14) Table 1. Economic Indicators for project evaluation (Detail calculation in Appendix).. (15) Appendix: Fig 1. Operating GTL plants on the world map [The Oil Gas Year, 2015] . (21) Fig 2. Simulation flow chart developed for the project (from Aspen plus V 7.2 Microsoft Visio 2010) (22) Table 1: Used compounds and Values of yields for reactor 4 in the model . (19-20) Table 2: Economic Evaluation for case 1: 10 MMSCFD ..(23) Table 3: Economic Evaluation for Case 2: 62.45 MMSCFD (24) Table 4: Mass balance of streams 1-22 for Case 1: 10 MMSCFD .(25-26) Table 5: Mass balance of streams 1-22 for Case 2: 62.45 MMSCFD .. (27-28) Abstract: The worlds energy demand is growing exponentially and to meet this demand, bringing new supply sources to the market is extremely critical. Natural gas resources are plentiful, geographically diverse and currently also the cleanest burning fossil fuel. Gas to Liquids (GTL) is a chemical process that transforms natural gas or other gaseous hydrocarbons into high quality liquid products that would otherwise be produced from crude oil [Shell Global]. GTL creates an additional opportunity to monetize a countrys resource of natural gas by turning them into high quality liquid fuels. GTL products are colorless and odorless hydrocarbons with very low level of impurities. The purpose of this project is to simulate a small scale GTL (STG Plus) plant that converts 10 MMSCFD of rich-methane natural gas into 672 BBL/day of gasoline. The first step of the STG Plus process is called steam reforming and it consists of the reaction between the methane in the natural gas with abundant water. The second step of the process is the reaction between the hydrogen, and the carbon monoxide producing methanol. The methanol thus formed will be converted to dimethyl ether (DME) and finally, the DME will be dehydrated, producing gasoline. The project will also highlight the difference between two major GTL technologies: Fischer Tropsch and STG Plus. An economic evaluation was conducted to check the viability of this process and at 10 MMSCFD conversion of methane; the project proves to be economically profitable, with an NPV value of $14.66M at 10% discount rate. It was also determined that if the production of gasoline increases to over 4,100BBL/day, the profitability of this project will increase significantly. 1.0. Introduction 1.1. GTL Technology and the World Gasoline to Liquid (GTL) is a technology that converts natural gas or other gaseous hydrocarbons into high quality liquid products like gasoline or diesel fuel, otherwise produced from crude oil []. GTL products are colorless and odorless hydrocarbons with very low level of impurities. Refineries can also use GTL to convert some of their gaseous hydrocarbon waste products into valuable fuel oil which can be used to generate income. The worlds first commercial GTL plant was opened by Shell in Bintulu, Malaysia in 1993. In 2011, the largest GTL plant, Pearl GTL was opened in Qatar [Shell Global]. Figure 1 in the Appendix shows all operating GTL plants and their corresponding locations on the world map. 1.2. GTL Origin In 1920s, when Germany found itself short of petroleum but with ample reserves of coal, GTL and Coal-to-Liquids (CTL) technologies were pioneered using a process known as Fischer-Tropsch (F-T) synthesis (Heng et al. 2004). Methanol-to-gasoline (MTG), Mobils synthetic gasoline process, based on the transformation of methanol to hydrocarbons using zeolite catalysts, was the first major synfuel process development in half a century since the development of the Fischer-Tropsch process (Frerich J. Keil, 1998). 1.3. Gas-to-Liquid (GTL) technology Gas to Liquids (GTL) is a refinery process that converts gas or other gaseous hydrocarbons into products with longer carbon chains. Gasoline and diesel fuel are classic examples. Gases with a high concentration of methane are transformed into liquid synthetic fuels following two methods: direct transformation using processes without the presence of catalysts that convert methane to methanol or by using syngas as a midway product, such as in the Fischer Tropsch, Syngas to Gasoline Plus and Mobil processes. This project will focus on designing a small scale Syngas to Gasoline (STG) plus plant that uses methane rich natural gas as feed and converts it to high quality gasoline and other products. 2.0. Syngas-to-Gasoline plus (STG+) process STG+ process was derived from the MTG (Methanol-to-Gasoline) process, which was developed by Mobil in the 1970s. This technology directly converts natural gas-derived syngas into drop-in gasoline and jet fuel through a catalytic thermo-chemical single-loop process that minimizes complexity, improves product quality and yield. The plus in STG+ stands for the alternate end products yielded by the process. The STG+ technology is currently operating by Primus Green Energy company in Hillsborough, New Jersey at pre-commercial scale with a production of 100,000 gallons (approximately) of distinct quality gasoline per year from natural gas with surpassed performance of the STG+ system and catalyst and 720 hours of continuous operation. The STG+ process consists of the following operating steps in one continuous process loop. It comprises of Syngas generation by steam reforming method, four fixed bed reactors in series and a two phase separator. Figure 1: Schematic sketch of the STG+ system (from Primus Green Energy TM) 2.1. Syngas Generation by Steam reforming method The first step in the STG+ process is to convert the natural gas feed into syngas or synthesis gas which is an intermediate gas feed for many different petrochemical processes. This processing basically removes contaminants, such as mercaptans, sulfides, mercury and any others that can compromise the various catalysts performance that are used in the STG+ reactors before it is fed to the syngas generation unit. Either partial oxidation or steam reforming processes are used for syngas production. Steam reforming process is widely used to generate syngas for feedstock in different petrochemical processes. A mixture of hydrogen, carbon monoxide, carbon dioxide, and unconverted methane and steam are formed when methane reacts with steam in the presence of a catalyst such as Nickel or Rhodium at high temperature (800-1000 C), high pressure (20-40 bars) and steam-to-carbon ratio varying between 1.8 and 4 in the steam reforming process which is highly endothermic in nature (Mbodji et al., 2012). The possible reactions are: The steam methane reforming reaction (SMR) CH4 + H2O à ¢Ã¢â‚¬ ¡Ã¢â‚¬Å¾ CO + 3H2 [ΆH = +206 kJ mol-1] (strongly endothermic).. (1) The water-gas shift (WGS) CO + H2O à ¢Ã¢â‚¬ ¡Ã¢â‚¬Å¾ CO2 + H2 [ΆH = -41 kJ mol-1] (moderately exothermic) . (2) The product from the reformer depends on the operating pressure temperature, composition of the feed gas, and the proportion of steam fed to the reactor. The thermodynamics and kinetics of the reaction within the reformer decides the amount of carbon monoxide in the final product from the steam reformer (Larminie Dicks, 2000). 2.2. Reactor 1 (Methanol Synthesis) Centrifugal compressors are used to compress the syngas from reforming unit which enters the reactor 1 containing copper zinc as catalyst and the following reaction occurs. 2H2 + CO à ¢Ã¢â‚¬ ¡Ã¢â‚¬Å¾ CH3OH [ΆH = -92 kJ mol-1] .. (3) Due to the exothermic nature of the reactions, low temperatures favor conversion to methanol and pre-heating of the reactant gas and heating of the boiler feed water are done by this excess heat. The position of the equilibrium depends on the pressure and temperature. The methanol formation is favored by increase in pressure. 2.3. Reactor 2 (Dimethyl Ether (DME) Synthesis) After the crude methanol from reactor 1 is preheated, vaporized and then superheated between 300-320oC in a series of heat exchangers, it is then sent to the dimethyl ether (DME) reactor containing a dehydration catalyst (alumina) where methanol is partially dehydrated to an equilibrium mixture of DME, water and methanol which is a reversible and exothermic reaction. 2CH3OH à ¢Ã¢â‚¬ ¡Ã¢â‚¬Å¾ CH3OCH3 + H2O . (4) 2.4. Reactor 3 (Gasoline Synthesis) In reactor 3, in presence of catalyst the product gas from reactor 2 converts to hydrocarbons including paraffins (alkanes), aromatics, naphthene (cycloalkanes) and olefins (alkenes), mostly from C6 to C10. 2.5. Reactor 4 (Gasoline Treatment)    To have high octane number for synthetic gasoline and desirable volumetric properties, the product from reactor 3 is treated in reactor 4 to reduce the durene (tetra methylbenzene), Iso durene and tri methylbenzene components which have high freezing points. 2.6. Separator Finally, in the reactor 4 two or three phase separation is done to obtain synthetic gasoline comprised of paraffins, aromatics and naphthene, non-condensed gas and water. The non-condensed gas is recycled back to the feed stream for reactor 1 and water is recycled back to the Steam Reformer (Syngas Generation Unit). 3.0. Why STG+? The previous group responsible for GTL used the conventional GTL technology called Fisher Tropsh (FT) in their simulation process. Fischer-Tropsch (FT), which is a technology developed in early 1920s, converts gas into liquid hydrocarbons mainly diesel through a very complex process. While there have been significant improvements on the efficiency and technology of the Fisher-Tropsch process, the industry is in an urgent need of new technologies capable of converting as much gas as possible into liquid fuels in a cheaper and more efficiently manner. As consequence, we decided to apply for our project the novel process called STG+ developed by Primus Energy. The main product of STG+ is gasoline as opposed to diesel. Since the most demanded liquid fuel in Canada, especially in Alberta, is gas, we decided not use FT or any new technology producing diesel. STG+ has numerous advantages over the conventional GTL techniques such as: lower operating and capital costs, higher production, bett er product quality and faster delivery times. The rival technology of STG+ is ExxonMobils MTG process. However, ExxonMobils MTG process has a greater environmental impact and it is not very cost-effective. STG+ process was designed to correct some inefficiencies in the ExxonMobil process . The main correction is the integration of the reactors in a single-loop that increases the production and yields a higher quality of the gasoline with a less environmental impact A key example is integration of the reactors in the STG+ process. 4.0. Project Design/Simulation 4.1. Flowchart Description The lists of components that are considered in the simulation for the STG+ process and the yields in mass base for the fourth reactor (Keil, 2012) are shown in the Appendix (Table 1). The flowchart developed for the STG+ process is shown in the fig. 2 of Appendix. A brief explanation of the flowchart will be done now. First, our feedstock is basically the natural gas. For simplification purposes, our feed of natural gas is basically methane. Another feedstock that this process will have is fresh water. The water will be heated in a heat exchanger (HE-01) and will be mixed with the methane to enter the first reactor (R-01). In this reactor, carbon monoxide, carbon dioxide and hydrogen will be produced, as explained above. The fractional conversion in the first reaction is 83.4% of the methane, the limiting reactant. The conversion in the second reaction is 6% of the carbon monoxide (Choudhary et al, 1992). The exit stream of the reactor R-01 is cooled in a heat exchanger (HE-02), enters a compressor (CP-01) to increase the pressure for the second reaction process and, finally, enters another heat exchanger (HE-03) to adjust the temperature for the ideal temperature in reactor R-02. The operating conditions of this reactor are 69 bar and 380ƚ °C (Wood et al, 2012). In it, basically, the syngas will be consumed to form methanol. The fractional conversion of this reaction is 63.7% of carbon monoxide (Lebarbier et al, 2012). The exit stream of reactor R-02 will pass through a heat exchanger (HE-04) to adjust the temperature of the mixture to enter reactor R-03. The methanol will form dimethyl ether (DME) and water. The operating conditions of this reactor are 12 bar and 325 °C (Wood et al, 2012). The fractional conversion of the methanol for this process is 76% (Kasaie et al, 2010). The stream that comes out of reactor R-03 passes through a heat exchanger (HE-05) to reduce its temperature and then enters a liquid-vapor flash vessel (FV-01). The dimethyl ether along with the non-polar components will come out in the gas stream, while the water will come out in the bottom or liquid stream, which can be sent to the effluent treatment plant. The gas stream will pass through a compressor (CP-02) and then through a heat exchanger (HE-06) to adjust the temperature and pressure for the fourth reaction process in reactor R-04. Basically, in this reactor, the dimethyl ether will be dehydrated in order to break down its molecule into -C2H4- radicals, which will be combined to form bigger molecules, as explained above. Since the reaction process is complex and the number of reactions is big, the stoichiometry of the process will be very complicated. Therefore, this paper only shows the yield in mass basis of each component formed in reactor R-04 (yield per unit mass of tota l feed of components that are not listed as inerts) (Aspentech Support Technology, 2001). Since only the dimethyl ether (DME) is a reactant in reactor R-04, all of the other compounds that enter reactor R-04 are considered inerts. The exit stream of reactor R-04 will pass through a compressor (CP-03) and through a heat exchanger (HE-07) to adjust the pressure and temperature for the last flash vessel (FV-02). This flash vessel is a liquid-liquid-vapor separator that will separate on the top the gas and lightest products. The middle liquid stream will be the gasoline formed (main stream) and the bottom liquid stream will be the water that was formed in the reactor R-04 and must be removed. The gas stream can be sold to an industry that processes gas phase hydrocarbons, while the water removed can be sent to the effluent treatment plant. 4.2. Thermodynamic Model and Simulation Considerations The simulation of the STG+ process was developed in the software Aspen Plus ® version 7.2. In our simulation, we chose the GRAYSON model, because it was developed for systems consisting of hydrocarbons, such as carbon dioxide and hydrogen sulfide. This method should return good results for temperatures in the range of 60 °F to 800 °F and pressures up to 3000 psia (Aspentech Support Technology, 2001). Since our process contains hydrogen and all the temperatures of the streams are within this temperature range, we can use the GRAYSON model (Aspentech Support Technology, 2001). The first three reactors (R-01, R-02 and R-03) were modeled in Aspen Plus as RSTOIC reactors since only fractional conversions and stoichiometry were considered for them. The last reactor (R-04) was modeled as an RYIELD reactor. In this model, the input data that is required consists of the outlet temperature and pressure of the reactor, as well as the yield values for the components that are products of the reaction process. 4.3. Assumptions adopted in the simulation Natural gas feed consists only of methane; We used only flash drums to perform the separation of the components after the reactions. The gasoline yields only consist of paraffins, olefins, aromatics and cyclic hydrocarbons from C2 to C11. Fractional conversions and stoichiometry are only considered for the first three reactors and no kinetic parameters for the reaction processes and catalyst deactivation are considered due to lack of data. Even though the STG+ process is well known for the loop which defines the efficiency of the process, due to lack of data on fractional conversions for C2-C11 compounds, we restricted our simulation till gasoline production and planned to sell our product (Gasoline and Natural Gas) to the other parties who are in charge of any post treatment required. Since we are not including the durene/Isodurene in our output, the Gasoline treatment reactor is not considered. 5.0. Economic Evaluation In order to evaluate the economics of the project, a cash flow analysis is made based on the following considerations: Our business model consider buying treated natural gas to be used as both feedstock and fuel gas (we dont pay royalties because we are not producing it), paying for electricity consumption; and revenues come from gasoline and natural gas sales. Two years for construction and 20 years of operations. 340 days of production per year. Analysis in constant American dollars of January 2017, exchange rate of 1.30 CAD to USD. Annual non-fuel operating and maintenance cost equal to 3.6% (Haro P. et al ,2013) of total capital expenditures. Corporate income tax rate equal to 28%. Electricity consumption, fuel gas required, flow rates (feed and products) from the simulation model. Current prices for gasoline, natural gas and electricity in Alberta, taken from Alberta Energy websites. Capital Cost Allowance (CCA) with a half year rule is considered for tax calculation purpose according to Alberta legislation. Discount rate 10%. Capital expenditure (CAPEX) for syngas generation is estimated using figures for a known plant (Yang Ogden, 2005) and the following equation to take into account the different capacities. . (5) Where, Cx = capital cost for a plant of size x (Sx), Cb = capital cost of the known plant of size b (Sb). CAPEX related to the STG+ process itself is estimated based on the ratio given by Primus Green Energy (company proprietary of the STG+ technology) that syngas generation typically represents 60% of total capital cost for commercial-scale plant and the STG+ process itself represents the other 40%. Two scales are considered: 10 MMSCFD of natural gas in the feed for comparison purpose with the previous years group and 62.5 MMSCFD of natural gas in the feed to evaluate the influence of the scale on the economic indicators. The economic indicators of the project are summarized in the following table: Feed Gas Flow rates (MMSCFD) 10 62.5 Net Present Value NPV @10% (million $) 14.66 371.86 Internal Rate of Return IRR 12.12% 22.87% Profit to Investment Ratio PIR 0.14 0.97 Breakeven price for Gasoline (CAD/L) 0.91 0.62 Table 1: Economic Indicators for project evaluation (Detail calculation in Appendix) Finally, a sensitivity analysis is made to see the influence of different variables: natural gas price, electricity price, gasoline price and capital cost on the NPV of the project. For these, all variables are changed +10% and -10% and the NPV are calculated. Results shown in the fig. 2 correspond to the case with 62.5 MMSCFD in the feed. However, it is the same trend in both cases: Figure 2: Sensitivity Analysis for case 62.5 MMSCFD It can be concluded that the project is economically feasible and the variable that impact the most the economics of the project is the gasoline price. 6.0. Recommendations We recommend considering the fractional conversions for C2-C11 compounds in reactor 1 to have a better picture of STG+ with its close loop process. A thorough composition analysis for gasoline in the fourth reactor gives more realistic results. There is much scope to extend our work by adding gasoline treatment and distillation column (instead of flash drum for more efficient separation) with proper chemical reactions and stoichiometric fractional conversions and kinetics to improve the market value of our product. There is possibility for considering more components in the feed gas till C5-C6. In our model, due to lack of data, we focused on chemical reactions and stoichiometric fractional conversions. There is scope for more efficient designing by working on catalyst cycle life. 7.0. Conclusion The 21st century is witnessing the establishment of a new global business based on natural gas processing. As a consequence, the gas-to-liquids (GTL) industry is becoming increasingly important as it is getting more difficult to find and extract new oil reserves as well as the presence of more environmental restraints. This is why we decided to apply the new STG+ process technology in our project to demonstrate its efficiency in the conversion of methane to gasoline. As previously stated, we decided to differ from the previous group process, mainly because its technology is old and their product is diesel as opposed to STG+ process which is a novel technology and its product being gasoline, which is more demanded in Canada. We chose to do the simulation of a small scale GTL plant that processes 10 MMSCFD of methane, producing 672 bbld, which resulted in an economically viable process. The economic indicators showed that, by increasing the production of gasoline, the profit would incr ease significantly (proven with the case 0f 62.5 MMSCFD). In conclusion, STG+ might be indeed successful and profitable in Alberta if there is a reliable source of natural gas and good market conditions. 8.0. References Alberta energy website.http://www.energy.alberta.ca/NaturalGas/1316.asp. Accessed on March 16th, 2017. Alberta energy website.http://www.energy.alberta.ca/Electricity/679.asp. Accessed on March 16th, 2017. Aspentech Support Technology, Inc.; Aspen Physical Property System 11.1; Cambridge, MA, September 2001. Choudhary V. R., Rajput A. M., Prabhakar B; Low temperature oxidative conversion of methane to syngas over NiO-CaO catalyst; Chemical Engineering Division; National Chemical Laboratory, India, May 1992. Haro P, Trippe F, Stahl R, Henrich E. Bio-syngas to gasoline and olefins via DME: A comprehensive Techno-economic assessment; Apple Energy; 2013; volume 108; page no.: 54-65. Heng H.C., Idrus. S; The future of gas to liquids as a gas monetization option; Journal of Natural Gas Chemistry 13, 2004; pages 63-70. http://www.albertagasprices.com/index.aspx?fuel=C . Accessed on March 16th, 2017. Kasaie M., Sohrabi M.; Kinetic Study on Methanol Dehydration to Dimethyl Ether Applying Clinoptilolite Zeolite as the Reaction Catalyst; Chemical Engineering Department, Amirkabir University of Technology, Tehran, Iran, January 2010. Keil, Frerich J.; Methanol-to-hydrocarbons: process technology; Department of Chemical Engineering, Technical University of Hamburg-Harburg, Hamburg, Germany, July 1998; page 49. Larminie, James, Dicks, Andrew; Fuel Cell Systems Explained; West Sussex, U.K.: John Wiley Sons; 2000. Lebarbier V. M., Dagle R. A., Kovarik L., Adarme J. A. L., King D. L., Palo D. R.; Synthesis of methanol and dimethyl ether from syngas over Pd/ZnO/Al2O3 catalysts; Richland, USA, June 2012. Mbodji M., Commenge J.M., Falk L., Di Marco, Rossignol F., Prost L., Valentin S., Joly R., Del-Gallo P. Steam methane reforming reaction process intensification by using a milli structured reactor: Experimental setup and model validation for global kinetic reaction rate estimation, Chemical Engineering Journal, vol. 207-208, pages 871-884. Primus Green Energy website (http://primusge.wpengine.com/press-room/white-papers/), Accessed in March 2017. Shell Global Website (http://www.shell.com/energy-and-innovation/natural-gas/gas-to-liquids.htm), Accessed March 05, 2017. Wood, David A., Nwaoha C., Towler, Brian F; Gas-to-liquids (GTL): A review of an industry offering several routes for monetizing natural gas; Journal of Natural Gas Science and Engineering, Volume 9, November 2012. Yang, Christopher; Ogden, Joan M. (2005).Analyzing Natural Gas Based Hydrogen Infrastructure Optimizing Transitions from Distributed to Centralized H2 Production; Institute of Transportation Studies; UC Davis. 9.0. Appendix Component in Aspen Plus ® Component name Formula Mass yield METHANE Methane CH4 - METHANOL Methanol CH4O - CO Carbon monoxide CO - CO2 Carbon dioxide CO2 - H2O Water H2O - ETHER Dimethyl ether C2H6O - H2 Hydrogen H2 - OCTANE n-Octane C8H18 3.582 HEXANE n-Hexane C6H14 2.702 HEPTANE n-Heptane C7H16 3.142 NONANE n-Nonane C9H20 4.022 DECANE n-Decane C10H22 4.462 N-C11 n-Undecane C11H24 24.602 N-C5 n-Pentane C5H12 36.078 OXYGEN Oxygen O2 47.549 ETHANE Ethane C2H6 4.901 PROPANE Propane C3H8 45.691 N-BUTANE n-Butane C4H10 69.321 ISOC4 Isobutane C4H10 101.615 ISOC5 2-Methyl-butane C5H12 75.269 ISOC6 2-Methyl-pentane C6H14 34.921 ISOC7 2,2-Dimethylpentane C7H16 3.137 ISOC8 2,2-Dimethylhexane C8H18 1.690 ISOC9 2-Methyloctane C9H20 0.491 ISOC10 2-Methylnonane C10H22 37.092 AROMC6 Benzene C6H6 4.024 AROMC7 o-Xylene C8H1

Use of Sex in Advertising Essay -- essays research papers

The use of sex in advertising may create unrealistic ideals for men regarding women, however, it is a powerful tool for selling products. Through the years advertisers have shown through their advertisements that sex does sell products. Especially when selling to the male viewers. Sex is the second strongest of the psychological appeals, right behind self-preservation, and its strength is biological and instinctive, the genetic imperative of reproduction (Taflinger). Sexual desire is an instinctive reaction in animals, and a person?s perception of a suitable mate is the basis (Taflinger). That perception is usually a set of criteria that the opposite sex must meet, and those that meet and exceed those criteria will provide the chance for the highest quality offspring with the best chance of survival (Taflinger). In time and energy, the male expends virtually nothing in sexual contact compared to the female, biologically, the best strategy for a man is to be promiscuous because the more women with whom he mates, the greater number of children containing his genes are possible (Taflinger). Thus, a man's biological criteria can be simple: ?she must be healthy, she must be young, she must be receptive, and she must be impregnable? (Taflinger). However, women have a greater physical, physiological and temporal stake in producing children, which means she is more interested in the quality of genes he brings and the help she will have while carrying, bearing and rearing the children (Taflinger). The purpose of advertising is to convince people that products are of use to them in one way or another, and advertisers must do it very quickly, because they do not have the time or the space to go into detail or explanations. The sex... ...ructed as objects to be viewed, either by men in the photograph or by the reader. Women?s bodies are used in ads as little more than props for selling products, such as the common photographs of a half-naked woman posing to sell jeans, cars, alcohol, and a myriad of other products (Jensen). The few available studies suggest that the media does have an impact because of the fact that the media has kept sexual behavior on public and personal agendas, media portrayals reinforce a relatively consistent set of sexual and relationship norms, and the media rarely depict sexually responsible models (Brown). Overall, sex influenced advertisements affect both genders. This being said it also affects one gender more than the other. Knowing that this is a factor, will there ever be a breaking point to show that these sex driven advertisers and advertisements have gone too far?

The Numbing of the American Mind: Culture as Anesthetic Essay -- Thoma

ENLIGHTENED SURRENDER How many essays have been written about American culture? How many books dedicated to the intense scrutiny of every aspect of our modern society? Countless thoughts, countless theories—many of them lost in the very chaos that the authors spent 300 pages explaining. There are always solutions, which their creators seem entirely convinced will solve this mess, but the truth is that these ideas are often impractical and unrealistic. But no one writes an entire book complaining without offering us something at the conclusion. Sociologists parade around with their own superfluous speculations, conflicting and contradictory, but this must be better than unresolved pessimism, right? Thomas de Zengotita doesn’t seem to think so. In his essay, â€Å"The Numbing of the American Mind: Culture as Anesthetic,† he discusses the perceptual overload of Americans and the differing and indistinguishable levels of reality in which we exist. He claims that most people don’t know and can’t recognize what is real what is not. There are so many different kinds of reality—he lists sixteen out of many—and they have all become so intertwined into our lives that they bleed together. As a result of these discrepancies, we can no longer appreciate the differences between what is important and what isn’t. Using modern examples like the events of September 11th and the media’s response to them, de Zengotita explains how we’ve become numb to things â€Å"so enormous, so horrific, so stark, that [we believe] the great blob of virtuality that is our public culture would be unable to absorb it† (342). It is a typical review of American society— pessimistic and daunting—though his sarcastic humor and nonchalant attitude are... ...ous diagnosis of a serious condition. Would we rather not know about it because it happens to be incurable? This goes much deeper than subject matter, or political bias, the usual folder. It determines the way we frame everything . . . the attitude we bring to living in this world of surfaces. (de Zengotita 350) No amount of truth can ever bring about change on the grand scale, but the way you chose to function within it will define the difference between prisoner and progressive. In expressing a helplessness to do nothing, de Zengotita has accomplished more than all the theories in the world. â€Å"It was to have been the end of irony, remember?† (de Zengotita 340) Works Cited Zengotita, Thomas de. â€Å"The Numbing of American Minds: Culture as Anesthetic.† 2002. The Text Wrestling Book. Eds. Donna LeCourt, et al. Dubuque, Iowa: Kendall Hunt, 2005. 340-351.