%0 Journal Article
%T KineticStudyofCo-b-ZeoliteforSelectiveCatalyticReduction
%A 毛树红
%A 王润平
%A 池永庆
%A 王艳
%A 张清华
%A 丛燕青
%J 过程工程学报
%D 2011
%X Theeffectsofgrainsize,spacevelocity,temperatureandreactantconcentrationonthekineticsofNOxreductionwithpropaneoverCo-b-zeolitecatalystwereinvestigated.Theexternalmasstransferphenomenonwasexaminedbyvaryingthespacevelocity.Theresultsshowthatthetransfercanbenegligiblewhenthespacevelocityisgreaterthan60000h-1inlowtemperaturerange.However,thetransferexistsathightemperaturesevenwhenthespacevelocityreachesahighlevel.Variationofthecatalystgrainsizefrom0.05to0.125mmdoesnotchangetheconversionrateofNOx.Theconcentrationsofcomponents,NOx,C3H8andO2,werealsoinvestigatedtohaveabetterunderstandingofmechanism.Basedontheexperimentaldata,theselectivityformulawasproposed.Theresultsshowsthatlowertemperatureishelpfultogethigherselectivityastheactivationenergyofhydrocarbonoxidation,Ea,2,isgreaterthanthatofNOxreduction,Ea,1,(Ea,2>Ea,1).HighNOxconcentrationandlowC3H8concentrationarebeneficialtohighselectivity.Howeverinordertomaintainhighactivitysimultaneously,thetemperatureandC3H8concentrationshouldbehighenoughtopromoteNOxreduction.10%(j)H2Oand75′10-6(j)SO2wereintroducedintothereactionsystem,andCo-b-zeoliteshowsstrongresistancetowaterandSO2.
%K selectivecatalyticreduction
%K NOx
%K cobalt
%K b-zeolite
%K propane
%K hydrocarbon
%U http://www.jproeng.com/qikan/Cpaper/zhaiyao.asp?bsid=16186