مدل سازي و شبيه سازي يك راكتور كاتاليستي جهت حذف مركاپتان ها از مايعات نفتي

چكيده انگليسي :

Modeling and Simulation of Catalytic Reactor to Demercaptanization of Liquid Oil Alireza Safadoost a safadoost@ce iut ac ir May 3 2011 Department of Chemical Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language FarsiSuperviser Mohammad Reza Ehsani ehsanimr@cc iut ac irAbstractOil enhanced recovery from oil reservoirs especially from heavier oil reservoirs due to the need of industrialcountries has put the refining industries in the way of development Low API oil will cause problems such asthe production of more sulfur pollutants during the refining process Compounds of environmental issueswhich also lower the burning quality of the products Legislation of strict environmental laws for reduction ofpollutant fuels dangers has made the oil companies to put the sweetening of oil products in high priority Oneof the sulfuric pollutants is the mercaptans These compounds are the most undesirable sulfur compounds inpetroleum products due to their foul odor highly corrosive nature causing undesirable oxidation andpreventing some additives activity There are various methods to remove mercaptans but the major one is thecatalytic oxidation in the presence of caustic solution and air Phthalocyanines of the metals like cobalt ironand manganese catalyze this reaction Among these metals cobalt is preferred The lack of mercaptanremoval in the usual sweetening processes has attracted so much attention in this area The catalyticoxidation of mercaptans in the presence of cobalt phthalocyanine derivatives and caustic solution is the mostimportant way for the removal of mercaptans from oil products Therefore the knowledge of the kinetics ofthe catalytic oxidation of mercaptans and inspecting the affecting parameters on the process are some of themost important parts of the mercaptan removal unit design Due to lack of information about the kinetic ofcatalytic oxidation of light mercaptans present in the light to middle distillation products some experimentswere accomplished in this project Useful experimental data were obtained by doing more than sixtyexperiments and investigating the effective parameters These data can be used for the simulation anddesigning mercaptan removal units Effective parameters such as temperature organic to aqueous phase ratio sodium hydroxide concentration and the nature of solvent and their effect on the rate of oxidation reactionwere reported as quantitative data Experiments were done in a semi batch bubble column reactor made ofglass in witch Organic and aqueous phases were designed to be batch and gas phase to be continuous Theseexperiments were done in the presence of merox catalyst as the most common catalyst So it was proved thatthe mercaptan oxidation reaction equation is first order with respect to mercaptan concentration zero orderwith respect to oxygen concentration and as order of 1 2 Modeling of the packed bed reactor of thesweetening unit was done after achieving experimental data Being able to change the effective parameters ofthe bed and feed steady state analytical solving high accuracy and simplicity are the advantages of theproposed modeling Using kinetic data and solving the model appropriate simulation was obtained Achievedresults were close to the reported results and existing unit s data Finally using programs written inMATLAB effect of the parameters such as the feed flow rate type of the existing mercaptan sodiumhydroxide concentration and unit s temperature on the sweetening process was investigated Keywords Merox kinetic study cobalt phthalocyanine demercaptanization mercaptanoxidation modeling fixed bed reactor

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مدل سازي و شبيه سازي يك راكتور كاتاليستي جهت حذف مركاپتان ها از مايعات نفتي

مراكس , مطالعه سينتيكي , كبالت فتالوسيانين , راكتورها , بستر