第23卷第2期2023年2月过程工程学报TheChineseJournalofProcessEngineeringVol.23No.2Feb.2023InvestigationonthecatalytichydrolysisactivityofCOSfromblastfurnacegasovertheγ-Al2O3-basedcatalystsPantingGAO1,2,YuranLI2*,YutingLIN2,QiangCAO1,2,LipingCHANG1*,JianchengWANG1,TingyuZHU21.StateKeyLaboratoryofCleanandEfficientCoalUtilization,TaiyuanUniversityofTechnology,Taiyuan,Shanxi030024,China2.InstituteofProcessEngineering,ChineseAcademyofSciences,InnovationAcademyforGreenManufacturing,Beijing100190,ChinaAbstract:Desulfurizationforblastfurnacegasisoneofthekeystoachieveultra-lowemissionsforthemulti-processintheironandsteelindustry.Thesulfurcomponentinblastfurnacegasismainlyorganicsulfur-carbonylsulfur(COS),whichisusuallyremovedbythecatalytichydrolysismethodwithγ-Al2O3basedcatalyst,butitshydrolysisactivityandantioxidantcapacityneedtobeimproved.Inthiswork,threekindsofcatalystswithFeorLaasanactivecomponentwerepreparedbytheimpregnationmethod.ThephysicalandchemicalpropertiesofthecatalystswerecharacterizedbyICP,XRDandTPD.Thediffusioneffectofgashourlyspacevelocity(GHSV)andparticlesizeonthecatalytichydrolysisofCOSwereinvestigatedonafixedbed-gaschromatographycombineddevice.Thestructure-activityrelationshipbetweenthephysicochemicalpropertiesofthecatalystsandthehydrolysisactivityofCOSandtheactionmechanismofO2werealsoanalyzed.TheresultsshowedthattheadditionofFeorLaasactivecomponentscanobviouslyimprovetheCOShydrolysisactivityonthecatalyst,duetothemuchmorealkalinesitesonthesurfaceoftheγ-Al2O3basedcatalystatconditionsof80℃and160000h-1.TheabundantporestructureandsuitableporesizecanalsoreducetheinternaldiffusionresistanceofCOSandH2S,enhancethemasstransferprocessofH2Sfromthecatalystsurfacetothegasphase.Fe/Al2O3catalystcancollaborativelyremoveH2Sandsimultaneouslymaintainahighhydrolyticactivity.ButthepresenceofO2enhancedtheadsorptionofH2SonthecatalystsurfaceandthesulfidationreactionbetweenH2SandmetalFe.WhileLa/Al2O3catalysthadbetteractivityandstabilityforCOShydrolysis,andtheactivecomponentLac...
