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PROCESS FOR AMMONIA PRODUCTION CHEMICAL REATION      N2 + 2H3 = 2NH3                      H= -22.0 Kcal RAW MATERIALS H2 from synthesis gas. N2 from air addition in susthesis gas process or from air liquifaction process. PROCESS DISCRIPTION Ammonia synthesis gas(3 moles pure H2 : 1 mole pure N2) is + is compressed to the operating pressure (100-1000 atms,depending on conversion required). It is through a filter to remove compression oil and additionally through a high tempreature guard convertor( converts CO and CO2 to CH4 and removes traces of H2O,H2S,P ans As). This is done by catalyst and suitable materials. The relatively cool gas is added along the outside if the converter tube walls to provide cooling so that carbon stell can be used for the thick wall pressure vessels and the internal tubes.The preheated gas flows next through the inside of tube which contains promoted porous iron catalyst at 500-550 celcius.The NH3 product ,with an 8-30% conversion depending on process

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What is ISEET ‐ Indian Science ‐ Engineering Eligibility Test? ISEET was the name given to the proposed common entrance test for admissions into central engineering institutions i.e. IITs, NITs, IIITs and IISERs. But now the name has been reset to JEE (Joint Entrance Examination). What is JEE previously ISEET JEE (Joint Entrance Examination) is the proposed Single National level entrance test to be conducted from the year 2013 for all students who seek admissions into central engineering institutions i.e. IITs, NITs, IIITs and IISERs. When will JEE be introduced? The first JEE will be held in the year 2013. It will be conducted for the admissions in academic session 2013-14. Which institutes are going to accept JEE score? • 15 Indian Institutes of Technology (IITs) and IT-BHU, Varanasi & ISMU, Dhanbad • 30 National Institutes of Technology (NITs) • 5 Indian Institutes of Information Technology (IIITs) • 6 Indian Institutes of Science Education & Research (IISERs).

METHODS OF PRODUCTION 1.Contact process 2.Chamber process Both processes are based on SO2,chamber process was devloped first(1746) but produced acid concentration less than 80%.Contact process yeilds 98% H2SO4 and higher which can be diluted,if necessary. Chamber process is virtually obsolete. CONTACT PROCESS chemical reactions S(s) + O2(g)  = SO2(g)                                      H= -70.9 Kcal SO2(g)  + 1/2 O2(g)  = SO3(g)                         H= -23.0 Kcal Raw materials SO2 is obtained from the following sources: 1.Sulphur 2.Pyrites 3.CuS,ZnS,PbS,MoS2 4.wate H2SO4 Catalyst Most widely used catalyst is vanadium pentaoxide dispersed on a porous carrier in pellet form. Platinum catalyst was previously used but suffer from easy poisioning ,fragility,rspid heat deactivation,high initial investment./ *Advantages of V2O5 catalyst -relatively immune to poisons -low initial investment and only 5% replacement per year -requires only 10 kg of catalyst mass contain