History and overview: Catalytic converter

History and overview: Catalytic converter A catalytic converter (colloquially, cat or catcon) is a device used to decrease the toxicity of emissions from an internal combustion engine. A catalytic converter works by using a catalyst to stimulate a chemical reaction in which toxic by-products of combustion are converted to less-toxic substances.First widely introduced on series-production automobiles in the U.S. market for the 1975 model year to comply with tightening EPA regulations on auto exhaust, catalytic converters are still most commonly used in motor vehicle exhaust systems. Catalytic converters are also used on generator sets, forklifts, mining equipment, trucks, buses, trains, airplanes and other engine-equipped machines. History The catalytic converter was invented by Eugene Houdry, a French mechanical engineer and expert in catalytic oil refining[1] who lived in the United States. Around 1950, when the results of early studies of smog in Los Angeles were published, Houdry became concerned about the role of automobile exhaust in air pollution and founded a special company, Oxy-Catalyst, to develop catalytic converters for gasoline engines an idea ahead of its time for which he was awarded a patent (US2742437). Widespread adoption had to wait until the extremely effective anti-knock agent tetraHYPERLINK http://en.wikipedia.org/wiki/Tetra-ethyl_lead-HYPERLINK http://en.wikipedia.org/wiki/Tetra-ethyl_leadethylHYPERLINK http://en.wikipedia.org/wiki/Tetra-ethyl_lead HYPERLINK http://en.wikipedia.org/wiki/Tetra-ethyl_leadlead was eliminated from most gasoline over environmental concerns, as the agent would foul the converter by forming a coating on the catalysts surface, effectively disabling it.[2] The catalytic converter was further developed by JohnHYPERLINK http://en.wikipedia.org/wiki/John_J._Mooney J. HYPERLINK http://en.wikipedia.org/wiki/John_J._MooneyMooney and CarlHYPERLINK http://en.wikipedia.org/wiki/Carl_D._Keith D. HYPERLINK http://en.wikipedia.org/wiki/Carl_D._KeithKeith at the EngelhardHYPERLINK http://en.wikipedia.org/wiki/Engelhard_Corporation HYPERLINK http://en.wikipedia.org/wiki/Engelhard_CorporationCorporation,[3] creating the first production catalytic converter . Metal-core converter Ceramic-core converter The catalytic converter consists of several components: The core, or substrate. The core is often a ceramic honeycomb in modern catalytic converters, but stainlessHYPERLINK http://en.wikipedia.org/wiki/Stainless_steel HYPERLINK http://en.wikipedia.org/wiki/Stainless_steelsteel foil honeycombs are also used. The honey-comb surface increases the amount of surface area available to support the catalyst, and therefore is often called a catalystHYPERLINK http://en.wikipedia.org/wiki/Catalyst_support HYPERLINK http://en.wikipedia.org/wiki/Catalyst_supportsupport. The ceramic substrate was invented by RodneyHYPERLINK http://en.wikipedia.org/wiki/Rodney_Bagley HYPERLINK http://en.wikipedia.org/wiki/Rodney_BagleyBagley, IrwinHYPERLINK http://en.wikipedia.org/wiki/Irwin_Lachman HYPERLINK http://en.wikipedia.org/wiki/Irwin_LachmanLachman and RonaldHYPERLINK http://en.wikipedia.org/w/index.php?title=Ronald_Lewis_(scientist)action=editredlink=1 HYPERLINK http://en.wikipedia.org/w/index.php?title=Ronald_Lewis_(scientist)action=editredlink=1Lewis at Cor ningHYPERLINK http://en.wikipedia.org/wiki/Corning_Glass HYPERLINK http://en.wikipedia.org/wiki/Corning_GlassGlass, for which they were inducted into the NationalHYPERLINK http://en.wikipedia.org/wiki/National_Inventors_Hall_of_Fame HYPERLINK http://en.wikipedia.org/wiki/National_Inventors_Hall_of_FameInventorsHYPERLINK http://en.wikipedia.org/wiki/National_Inventors_Hall_of_Fame HYPERLINK http://en.wikipedia.org/wiki/National_Inventors_Hall_of_FameHallHYPERLINK http://en.wikipedia.org/wiki/National_Inventors_Hall_of_Fame of HYPERLINK http://en.wikipedia.org/wiki/National_Inventors_Hall_of_FameFame in 2002. The washcoat. A washcoat is used to make converters more efficient, often as a mixture of silica and alumina. The washcoat, when added to the core, forms a rough, irregular surface, which has a far greater surface area than the flat core surfaces do, which then gives the converter core a larger surface area, and therefore more places for active precious metal sites. The catalyst is added to the washcoat (in suspension) before being applied to the core. The catalyst itself is most often a precious metal. Platinum is the most active catalyst and is widely used. It is not suitable for all applications, however, because of unwanted additional reactions and/or cost. Palladium and rhodium are two other precious metals used. Platinum and rhodium are used as a reduction catalyst, while platinum and palladium are used as an oxidization catalyst. Cerium, iron, manganese and nickel are also used, although each has its own limitations. Nickel is not legal for use in the European Union (due to reaction with carbon monoxide). Copper can be used everywhere except North America, where its use is illegal due to the formation of dioxin. How Catalytic Converters Work James L. Amos/National Geographic/Getty Images A large pile of platinum lined catalytic converters. See more green living pictures. There are millions of cars on the road in the United States, and each one is a source of air pollution. Especially in large cities, the amount of pollution that all the cars produce together can create big problems. To solve those problems, cities, states and the federal government create clean-air laws that restrict the amount of pollution that cars can produce. Over the years, automakers have made many refinements to car engines and fuel systems to keep up with these laws. One of these changes came about in 1975 with an interesting device called a catalytic converter. The job of the catalytic converter is to convert harmful pollutants into less harmful emissions before they ever leave the cars ­ exhaust system. Catalytic converters are amazingly simple devices, so it is incredible to see how big an impact they have. In this article, you will learn which pollutants are produced by an engine and how a catalytic converter deals with each of these pollutants to help reduce [edit] Types [edit] Two-way A two-way catalytic converter has two simultaneous tasks: Oxidation of carbon monoxide to carbon dioxide: 2CO + O2 à ¢Ã¢â‚¬  Ã¢â‚¬â„¢ 2CO2 Oxidation of unburnt hydrocarbons (unburnt and partially-burnt fuel) to carbon dioxide and water: CxH2x+2 + [(3x+1)/2] O2 à ¢Ã¢â‚¬  Ã¢â‚¬â„¢ xCO2 + (x+1) H2O (a combustion reaction) This type of catalytic converter is widely used on diesel engines to reduce hydrocarbon and carbon monoxide emissions. They were also used on gasoline engines in USA market automobiles until 1981. Due to their inability to control nitrous oxide NOHYPERLINK http://en.wikipedia.org/wiki/NOxx, they were superseded by three-way converters. [edit] Three-way Since 1981, three-way catalytic converters have been used in vehicle emission control systems in North America and many other countries on roadgoing vehicles. A three-way catalytic converter has three simultaneous tasks: Reduction of nitrogen oxides to nitrogen and oxygen: 2NOx à ¢Ã¢â‚¬  Ã¢â‚¬â„¢ xO2 + N2 Oxidation of carbon monoxide to carbon dioxide: 2CO + O2 à ¢Ã¢â‚¬  Ã¢â‚¬â„¢ 2CO2 Oxidation of unburnt hydrocarbons (HC) to carbon dioxide and water: CxH2x+2 + [(3x+1)/2]O2 à ¢Ã¢â‚¬  Ã¢â‚¬â„¢ xCO2 + (x+1)H2O These three reactions occur most efficiently when the catalytic converter receives exhaust from an engine running slightly above the stoichiometric point. This point is between 14.6 and 14.8 parts air to 1 part fuel, by weight, for gasoline. The ratio for LPG, natural gas and ethanol fuels is slightly different, requiring modified fuel system settings when using those fuels. Generally, engines fitted with 3-way catalytic converters are equipped with a computerized closed-loop feedback fuel injection system using one or more oxygen sensors, though early in the deployment of 3-way converters, carburetors equipped for feedback mixture control were used. While a 3-way catalyst can be used in an open-loop system, NOx reduction efficiency is low. Within a narrow fuel/air ratio band surrounding stoichiometry, conversion of all three pollutants is nearly complete. However, outside that band, conversion efficiency falls very rapidly. When there is more oxygen than required, the system is said to be running lean, and the system is in oxidizing condition. In that case, the converters two oxidizing reactions (oxidation of CO and hydrocarbons) are favoured, at the expense of the reduction of NOx. When there is excessive fuel, the engine is running rich; the reduction of NOx is favoured, at the expense of CO and HC oxidation. [edit] Oxygen storage Three-way catalytic converters can store oxygen from the exhaust gas stream, usually when the air fuel ratio goes lean.[5] When insufficient oxygen is available from the exhaust stream, the stored oxygen is released and consumed (see cerium(IV) oxide). This lean-ness occurs either when oxygen derived from NOx reduction is unavailable or certain maneuvers such as hard acceleration enrich the mixture beyond the ability of the converter to supply oxygen. [edit] Unwanted reactions Unwanted reactions can occur in the three-way catalyst, such as the formation of odiferous hydrogen sulfide and ammonia. Formation of each can be limited by modifications to the washcoat and precious metals used. It is difficult to eliminate these byproducts entirely. Sulfur-free or low-sulfur fuels eliminate or reduce hydrogen sulfide. For example, when control of hydrogen sulfide emissions is desired, nickel or manganese is added to the washcoat. Both substances act to block the adsorption of sulfur by the washcoat. Hydrogen sulfide is formed when the washcoat has adsorbed sulfur during a low temperature part of the operating cycle, which is then released during the high temperature part of the cycle and the sulfur combines with HC. [edit] For diesel engines For compression-ignition (i.e., diesel) engines, the most commonly used catalytic converter is the diesel oxidation catalyst. This catalyst uses O2 (oxygen) in the exhaust gas stream to convert CO (carbon monoxide) to CO2 (carbon dioxide) and HC (hydrocarbons) to H2O (water) and CO2. These converters often operate at 90% efficiency, virtually eliminating diesel odor and helping to reduce visible particulates (soot). But they cannot reduce NOx because chemical reactions always occur in the simplest possible way, and the existing O2 in the exhaust gas stream would react first. To reduce NOx on a compression ignition engine, the chemical composition of the exhaust must first be changed. Two main techniques are used: exhaust gas recirculation (EGR) and selective catalytic reduction (SCR). NOx trapping (with NOx absorbers) is a third method, but as of yet (2010), is not widely used. Diesel engine exhaust contains relatively high levels of particulate matter (soot), consisting in large part of elemental carbon. Catalytic converters cannot clean up elemental carbon, though they do remove up to 90% of the soluble organic fraction[citation needed], so particulates are cleaned up by a soot trap or diesel particulate filter (DPF). In the United States, all on-road heavy-duty vehicles powered by diesel and built after 1 January 2007 must be equipped with a catalytic converter and a diesel particulate filter.[6] Instead of catalysis, a reagent such as ammonia pyrolyzed in situ from urea, is sometimes used to reduce the NOx into nitrogen. One trademark product to do this is AdBlue. [edit] For lean-burn engines For lean burn spark ignition engines, an oxidation catalyst is used in the same manner as in a diesel engine. [edit] Installation Many vehicles have a pre-catalyst located close to the engines exhaust manifold. This unit heats up quickly due to its proximity to the engine, and reduces cold-engine emissions by burning off hydrocarbons from the extra-rich mixture used in a cold engine. Many three-way catalytic converters utilize an air injection tube between the first (NOx reduction) and second (HC and CO oxidation) stages of the converter. This tube is fed by a secondary air injection system. The injected air provides oxygen for the catalysts oxidizing reaction. These systems also sometimes include an upstream air injector to admit oxygen to the exhaust system before it reaches the catalytic converter. This precleans the extra-rich exhaust from a cold engine, and helps bring the catalytic converter quickly up to operating temperature. Some newer systems do not employ air injection. Instead, they provide a constantly varying mixture that quickly and continually cycles between lean and rich to keep the first catalyst (NOx reduction) from becoming oxygen loaded, and to keep the second catalyst (CO oxidization) sufficiently oxygen-saturated. They also utilize several oxygen sensors to monitor the exhaust, at least one before the catalytic converter for each bank of cylinders, and one after the converter. Some systems contain the reduction and oxidation functions separately rather than in a common housing. [edit] Damage [edit] Poisoning Catalyst poisoning occurs when the catalytic converter is exposed to exhaust containing substances that coat the working surfaces, encapsulating the catalyst so that it cannot contact and treat the exhaust. The most notable contaminant is lead, so vehicles equipped with catalytic converters can only be run on unleaded gasoline. Other common catalyst poisons include manganese primarily from the gasoline additive MMT, and silicone which can enter the exhaust stream if the engine has a leak allowing coolant into the combustion chamber. Phosphorus is another catalyst contaminant. Although phosphorus is no longer used in gasoline, it (and zinc, another low-level catalyst contaminant) was until recently widely used in engine oil antiwear additives such as ZDDP. Beginning in 2006, a rapid phaseout of ZDDP in engine oils began.[citation needed] Depending on the contaminant, catalyst poisoning can sometimes be reversed by running the engine under a very heavy load for an extended period of time. The increased exhaust temperature can sometimes liquefy or sublimate the contaminant, removing it from the catalytic surface. However, removal of lead deposits in this manner is usually not possible due to leads high boiling point. [edit] Meltdown Any condition that causes abnormally high levels of unburned hydrocarbons raw or partially-burnt fuel to reach the converter will tend to significantly elevate its temperature, bringing the risk of a meltdown of the substrate and resultant catalytic deactivation and severe exhaust restriction. Vehicles equipped with OBD-II diagnostic systems are designed to alert the driver of a misfire condition, along with other malfunctions, by means of the Check Engine light on the dashboard. [edit] Regulations This section does not citeany references or sources. Please help improve this articleby adding citations to reliable sources. Unsourced material may be challengedand removed. (March 2009) Emissions regulations vary considerably from jurisdiction to jurisdiction. In North America, most spark ignition engines of over 25 brake horsepower (19 kW) output built after January 1, 2004 are equipped with three-way catalytic converters. In Japan, a similar set of regulations came into effect January 1, 2007, while the European Union has not yet enacted analogous regulations. Most automobile spark ignition engines in North America have been fitted with catalytic converters since the mid-1970s, and the technology used in non-automotive applications is generally based on automotive technology. Regulations for diesel engines are similarly varied, with some jurisdictions focusing on NOx (nitric oxide and nitrogen dioxide) emissions and others focusing on particulate (soot) emissions. The regulatory diversity is challenging for manufacturers of the engine as it may not be economical to design an engine to meet two sets of regulations. Regulations of fuel quality vary across jurisdictions. In North America, Europe, Japan, and Hong Kong, gasoline and diesel fuel are highly regulated, and CNG and LPG are being reviewed for regulation. In most of Asia and Africa, the regulations are often lax in some places sulfur content of the fuel can reach 20,000 parts per million (2%). Any sulfur in the fuel can be oxidized to SO2 (sulfur dioxide) or even SO3 (sulfur trioxide) in the combustion chamber. If sulfur passes over a catalyst, it may be further oxidized in the catalyst, i.e. (SO2 may be further oxidized to SO3). Sulfur oxides are precursors to sulfuric acid, a major component of acid rain. While it is possible to add substances like vanadium to the catalyst wash coat to combat sulfur oxide formation, such addition will reduce the effectiveness of the catalyst. The most effective solution is to further refine fuel at the refinery to produce ultra-low sulfur diesel. Regulations in Japan, Europe, and North America tightly restrict the amount of sulfur permitted in motor fuels. However, the expense of producing such clean fuel make it impractical for use in many developing countries. As a result, cities in these countries with high levels of vehicular traffic suffer from acid rain, which damages stone and woodwork of buildings and damages local ecosystems. [edit] Negative aspects Some early converter designs greatly restricted the flow of exhaust, which negatively affected vehicle performance, driveability, and fuel economy.[7] Because they were used with carburetors incapable of precise fuel/air mixture control, they could overheat and set fire to flammable materials under the car.[8] Removing a modern catalytic converter in new condition will only slightly increase vehicle performance without retuning,[9] but their removal or gutting continues.[7]HYPERLINK http://en.wikipedia.org/wiki/Catalytic_converter#cite_note-9[10] The exhaust section where the converter was may be replaced with a welded-in section of straight pipe, or a flanged section of test pipe legal for off-road use that can then be replaced with a similarly fitted converter-choked section for legal on-road use, or emissions testing.[9] In the US and many other jurisdictions, it is illegal to remove or disable a catalytic converter for any reason other than its immediate replacement[citation need ed]; vehicles without functioning catalytic converters generally fail emission inspections. The aftermarket supplies high-flow converters for vehicles with upgraded engines, or whose owners prefer an exhaust system with larger-than-stock capacity.[11] [edit] Warm-up period Most of the pollution put out by a car occurs during the first five minutes before the catalytic converter has warmed up sufficiently.[12] [edit] Environmental impact Catalytic converters have proven to be reliable and effective in reducing noxious tailpipe emissions. However, they may have some adverse environmental impacts in use: The requirement for a rich burn engine to run at the stoichiometric point means it uses more fuel than a lean burn engine running at a mixture of 20:1 or less. This increases the amount of fossil fuel consumed and the carbon dioxide emissions of the vehicle. However, NOx control on lean burn engines is problematic. Although catalytic converters are effective at removing hydrocarbons and other harmful emissions, they do not solve the fundamental problem created by burning a fossil fuel. In addition to water, the main combustion product in exhaust gas leaving the engine through a catalytic converter or not is carbon dioxide (CO2).[13] Carbon dioxide produced from fossil fuels is one of the greenhouse gases indicated by the Intergovernmental Panel on Climate Change (IPCC) to be a most likely cause of global warming.[14] Additionally, the U.S. Environmental Protection Agency (EPA) has stated catalytic converters are a significant and growing cause of global warming, due to their release of nitrous oxide (N2O), a greenhouse gas over 300 times more potent than carbon dioxide.[15] Catalytic converter production requires palladium or platinum; part of the world supply of these precious metals is produced near the Russian city of Norilsk, where the industry (among others) has caused Norilsk to be added to Time Magazines list of most polluted places.[16] [edit] Theft Due to the external location and the use of valuable precious metals including platinum, palladium, and rhodium, converters are a target for thieves. The problem is especially common among late-model Toyota trucks and SUVs, due to their high ground clearance and easily-removed bolt-on catalytic converters. Welded-in converters are also at risk of theft from SUVs and trucks, as they can be easily removed.[17]HYPERLINK http://en.wikipedia.org/wiki/Catalytic_converter#cite_note-17[18] Theft removal of the converter can often inadvertently damage the cars wiring or fuel line resulting in dangerous consequences. Rises in metal costs in the United States during recent years have led to a large increase in theft incidents of the converter,[19] which can then cost as much as $1000 to replace.[20] [edit] Diagnostics Various jurisdictions now legislate on-board diagnostics to monitor the function and condition of the emissions control system, including the catalytic converter. On-board diagnostic systems take several forms. [edit] Temperature sensors Temperature sensors are used for two purposes. The first is as a warning system, typically on 2-Way catalytic converters such as are still sometimes used on LPG forklifts. The function of the sensor is to warn of catalytic converter temperature above the safe limit of 750  °C (1,380  °F). More recent catalytic converter designs are not as susceptible to temperature damage and can withstand sustained temperatures of 900  °C (1,650  °F).[citation needed] Temperature sensors are also used to monitor catalyst functioning usually two sensors will be fitted, with one before the catalyst and one after to monitor the temperature rise over the catalytic converter core. For every 1% of CO in the exhaust gas stream the exhaust gas temperature will rise by 100 °C.[citation needed] [edit] Oxygen sensors The Oxygen sensor is the basis of the closed loop control system on a spark ignited rich burn engine, however it is also used for diagnostics. In vehicles with OBD II, a second oxygen sensor is fitted after the catalytic converter to monitor the O2 levels. The on-board computer makes comparisons between the readings of the two sensors. If both sensors give the same output, the computer recognizes the catalytic converter is not functioning or removed, and will operate a check engine light and retard engine performance. Simple oxygen sensor simulators have been developed to circumvent this problem by simulating the change across the catalytic converter with plans and pre-assembled devices available on the internet, though these are not legal for on-road use.[21] Similar devices apply an offset to the sensor signals, allowing the engine to run a more fuel economical lean burn that may however damage the engine or the catalytic converter.[22] [edit] NOx sensors NOx sensors are extremely expensive and are generally only used when a compression ignition engine is fitted with a selective catalytic reduction (SCR) converter, or a NOx absorber catalyst in a feedback system. When fitted to an SCR system, there may be one or two sensors. When one sensor is fitted it will be pre-catalyst, when two are fitted the second one will be post catalyst. They are utilized for the same reasons and in the same manner as an oxygen sensor the only difference is the substance being monitored.

Deficiencies In Development Of Cocaine Children :: essays research papers

It has been estimated by the National Institute on Drug Abuse that every year 40,000 babies are born to mothers who have used cocaine during their pregnancy. Unfortunately, the outcome is unfair for these children, because the mothers do not take into consideration that they are responsible for another person’s life. These children have various levels of deficiencies in the learning process and in the way that they behave. The levels of deficiencies in children vary in accordance with the mother’s consumption of cocaine. Thereby not only are there defects at birth, but also later on in the developmental years. Women who use cocaine while pregnant cause a great damage to their children during the developmental years; especially in the aspects of cognitive motor and social/ behavioral deficiencies. Cognitive deficiencies are those that deal with an individual’s thinking and reasoning process. These abilities are seen in the beginning school years, not at birth, but are the subtle characteristics that only through the school environment can be recognized. In a class environment, the deficiencies of a cocaine child are often confused with those of a disruptive child. The underlying truth is: teachers are not able to cope with them on an individual basis and give them more attention. An initial sign that some children demonstrate is a lack of concentration on virtually every task. Excessive disorganization beyond that of regular children along with being more than just the class nuisance can be characteristics of cocaine-exposed children. While most children are able to stay on task, these children will be easily deterred if given the opportunity. These children tend to exhibit a lack of exploration of the environment which results in less pretend play (Cates, 68). In a study done by Mayes, â€Å"when given a box of toys, for example they [spend] less time exploring the new toys than [do] the control children† (Vogel, 39). Another pending issue is that cocaine-exposed children do as well as regular children in settings with no distractions, such as a one-on-one quiet room session. The truth is that in real life there are a plethora of distractions. A study conducted at Wayne State University, in Detroit found â€Å"that teachers rated 27 cocaine-exposed 6 -year-olds as having significantly more trouble paying attention than 75 non-exposed children (the teachers did not know who was who) (Begley, 1997, 63). Imitative play is a way of learning for toddlers, which drug-exposed children are less likely to demonstrate.

Gilgamesh and Antigone

I examined the role of Gods in two texts- Gilgamish and Antigone and I felt that each text defines the role of Gods in its own unique way. For Antigone, the role of Gods is indirect; this is shown in Antigone’s actions and beliefs as her character is obviously clear minded and always aware not only that honoring the divine was the right stand to take in any situation, but also how exactly to pay respect to them: â€Å"I know I’m pleasing those I should please most† (line 88).After realizing the fact that the body of her brother (Polyneices) would not be given last rites, she went to her sister asking her for help in honoring the divine. When her sister declined her desire and warned her of the risks of such actions, Antigone was steady in her decision believing that disrespecting the Gods was the real risk, saying : â€Å"The time in which I must please those that are dead/ is much longer than I must please those of this world† (76-7). he Chorus speech aft er Creon has more or less determined the fate of antigone: With wisdom had someone declared a word of distinction: that evil seems good to one whose mind the god leads to ruin, and but for the briefest moment of time is his life outside of calamity. (619-24) Those hints by the chorus throughout the play lead us to another approach to understanding the role of gods in the it; the Gods were in control of everything, resulting the events to unfold, and maybe to teach a moral lesson to the city and even to the audience as well.Events that support this interpretation include the arrival of Antigone at the place of her brother after the guards removed the dust on her brother’s body, for example in these lines: Suddenly a squall lifted out of the earth a storm of dust, a trouble in the sky. (417-9) We closed our eyes, enduring this plague sent by the gods. When at long last we were quit of it, why, then we saw the girl. (422-4) The Epic of Gligmesh, however, introduces numerous Gods . The role of Gods in Gilgamish is more complicated and has its direct and indirect actions throughout the story.The indirect role of Gods in my opinion is shown when they instead of disciplining Gilgamesh for his unfair treatment of the young men and women of Uruk, they created a counterpart to distract him from his bold and unbearable behavior. The direct role of Gods in Gilgamesh is revealed during the debate about putting Enkidu into death and Enlil, the highest God, ends the talk that one of the two (Enkidu and Gilgamesh) must die for slaughtering Humbaba and the Bull of Heaven. That was a direct role for Gods in the epic of Gilgamesh I believe.Enlil has the power over the entire cosmos and the affairs of man. He is sometimes friendly towards mankind, but can also be cruel and send punishments to people. He was angry and humans had reasons to fear objecting him; he had in the past tries to destroy the human race. Another God introduced is Ishtar; she was all at once the goddess of love, war and fertility. Her role was direct as she wanted to use the bull of heaven and wanted it to loose so she can watch him stab Gilgamesh to death because he rejected her . The Goddess Ishar saw him and fell in love with the beauty of Gilgamesh†¦ â€Å"Be my lover, be my husband†, she spoke and said, †¦ â€Å"plant your seed in the body of Ishtar†Ã¢â‚¬ ¦ Gilgamesh answered ad said†¦ â€Å"I have nothing to give to her who lacks nothing at all. You are the door through which the cold gets in†¦ You are the house that falls down†¦ the ill-made wall that buckles when time has gone by. † (p. 29-30). The epic of Gilgamesh certainly has various roles of Gods in it, and their impact was more direct than Antigone.

Biography Of John Calvin s Life - 1591 Words

Calvinism John Calvin was born in Noyon, France on July 10, 1509. (John Calvin, 2015) According to my readings, Calvin was found to be incredibly intelligent when he was a very young boy. In fact he entered college in Paris, when he was only fourteen! (John Calvin, 2015) I am now 31 and just graduating with my two year degree LOL, I cannot imagine starting at fourteen, but if I could have gotten my Master’s Degree by 18, it may have been worth it! Upon receiving his Masters of Arts Degree, his Father talked him into getting into studying law. (John Calvin, 2015) Well Calvin turned 21, and started studying God’s word. At this point, he really wasn’t interested in pursuing a career in law anymore, although he did receive his Doctorate degree. (John Calvin, 2015) I am guessing he just did it to please his Father, obviously money was not an issue in his life, because a career in the area of law is much more prosperous than a career in religion LOL! Calvin decided his true desire in life was to study and understand the scriptures of the good book. (John Calvin, 2015) He started studying the words in the Bible, and a lightbulb clicked on, â€Å"Hey something is not adding up here, what I am reading here in this book, is not what the Catholic Church is preaching.† He hopped on the bandwagon others that were pushing for the church to â€Å"reform and renew†. (John Calvin, 2015) This was apparently not the best of ideas, and eventually he was persecuted, and he was forced to run away fromShow MoreRelatedThe Renaissance : The Age Of Rebirth1426 Words   |  6 PagesThe Renaissance was from the 1300’s to the 1500’s. It started towards the end of the middle ages and the dark ages. It began after the Crusades when the Crusaders came back. The Renaissance was the age of rebirth. The age that consisted of many wonderful things including trade, art, science, architecture, religion, learning, and inventions. 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They both proclaimedRead MoreEdgar Allen Poe: Birth and Military865 Words   |  4 PagesThe story of the 19th century Romantic era poet Edgar Allen Poe is an interesting one indeed. Throughout his life he played the role of a writer of short stories, an editor and critic of all works, and poet of emotion; revolutionizing each role through his extremely pragmatic style. As a writer, Poe wrote everything from love stories to comedies to horror stories, even inventing the detective mystery genre, and as a poet, he set out to use poetry to transmit and arouse the reader’s sense of beau tyRead MoreThe Protestant Reformation And The Reformation871 Words   |  4 PagesChurch had been teaching. Some famous reformers are John Calvin and Martin Luther. However, Martin Luther-- to some--- is named the most successful and influential reformer of the 16th century. Martin Luther was tremendously effective and influential due to how resourceful he was, and his teachings spread across Europe swiftly. Martin Luther was born in Eisleben, Saxony which is located in Germany on November 10, 1483 (â€Å"Martin Luther- Biography†). Luther was born into humble living, with his parentsRead MoreHarriet Beecher Stowe : An Abolitionist1645 Words   |  7 Pageswas born in Litchfield, Connecticut, on June 14, 1811. He was the seventh of 13 children. Stowe was born religious leader Lyman Beecher and his wife Roxana, an extremely religious woman who died when Harriet was just five years old. Brothers Harriet s include a sister, Catharine Beecher, was an educator and author, as well as brothers who became ministers whose names are Charles Beecher, Edward Beecher, and Henry Ward Beecher, an abolitionist famous. Harriet enrolled in the seminary which was directedRead MorePros And Cons Of The 1920s Essay886 Words   |  4 PagesThe 1920s remodeled the country into the one we all know today. People s values, political views, mindset, and lifestyle evolved with this new era. For instance, women roles went from aspiring housekeepers to a new generation known as flappers. Flappers were free and adventurous women who wore loose clothing They enjoyed drinking, smoking, dancing and proudly disrespecting authority. Technology soon advanced as well. Inventions such as radios were developed. The mass production of fords automobilesRead MoreGeorge Whitfield s Life And Accomplishments1196 Words   |  5 Pagesinformation gleaned from an article in Conservapedia on Whitfield’s personal history and significant milestones in his life, George Whitfield was born in Gloucester, England; the youngest of seven children, the son of a saloon operator; who died when George was two. Also noteworthy, Whitfield married Elizabeth James in Wales on November 14, 1741, and on October 4, 1743, one son was born, named John, who died at age four months, the following February. Equally important, after converting to Christianity inRead MoreMary Shelley1066 Words   |  5 PagesMary in the late years of her life (Holmes). Many years later, Mary would get married to Percy Shelley although he had been previously engaged (â€Å"Shelley† Exploring). Although Mary’s mother never lived long enough for her to see her parents together, they were profound philosophers in many jargons of ideology (Miller 11). Mary and her husband Percy became important writers of second Romanticism inception. Many famous poets of the Romanticism era died in the early 1820 s, but Mary lived long into the