层柱粘土催化剂在SCR烟气脱硝中的应用.

(NONO2,NO90%),,NOx,(SCR)SCR,,SCRNOxNOx,NOx:2006-10-11:NOx:2004DFAO7700;(1982-),,,EnergyEnvironmentalProtectionVol.21,No.2Apr.,200721220074SCR,,(,250061):(NOx),,NOx,(SCR)NOx,SCRSCR,,SCR(PillaredInterlayerClays,PILC),,,:SCR;;;:X701:A:1006-8759(2007)02-0004-05SELECTIVECATALYTICREDUCTION(SCR)OFNOxOVERPILCCATALYSTXIAOKun,LUANTao,CHENGLin(CenterforSpaceThermalScienceofShandongUniversity,JinanShandong,250061)Abstract:NOxemissionfrompowerplantsisamajoratmospherepollutant.Itisharmfultohumanshealth.InChina,mostpowerstationsapplycombustionmodificationstolowertheNOxemission.Theselectivecatalyticreduction(SCR)ofNOxwhichisthemostefficienttechnologyhasntbeenwidelyusedduetoitshighcost.AsthelimitofNOxemissionfrompowerplantsgetsmoresevere,theSCRtechnologywillgetafastdevelopmentinChina.InSCRsystem,thecatalystisthemostimportantpart,whoseperformancesdecidetheefficiencyofthewholeSCRsystem.PillaredInterlayerClays(PILC)isanewcatalystwhichattractslotsofattentionintheworld.Thereisabundantbentonite,whichisthemainrawmaterialofPILC,inChina.ThestudyofPILCisofsignificancetothede2velopmentofenvironmentalprotectionindustryandnonmetalminingindustryinChina.Keywords:selectivecatalyticreduction;de-NOx;PILC;catalyst,SCRNOxSCR,,SCR(PillaredInterlayerClays,PILC),(Cross-linkingClays,CLC),,,SCR1SCR1.1SCR(SCR),,CO,NON2SCR,,SCR[1]:4NH3+4NO+O24N2+6H2O2NH3+NO+NO22N2+3H2O8NH3+6NO27N2+12H2O,NH3O2NH3NO,N2N2ONO1.2SCRSCR,SCR,,PtRhPd,2070,SCR,NH3,,[1],Pt,NOPt,Pt-OPt,,CO[2],TiO2(V2O5/TiO2)V,TiO2,SO2,WO3MoO3,,,SO2,MoO3[13],,,V2O5/TiO2,,NONH3E2ley-Rideal:NO,N2,,,,O2,,NH3,NO[14],,,,,,,,,[5]SCR,,,Y-ZSMMFI(MOR),Cu-ZSM-5,Mn,Cu,CoPdVIrFeCe,,[26],,Langmuir-Hinshel2wood:NH3,NOSCR5,NO2,,NON2H2O,,,NONO2[479]2SCR,SCR:(1),,,,[5](2)NH3,,BronstedLewis,[5]Bronsted,NH4+,Lewis,,SCR[34][78],NH3O2,,NH3[9](3)SCR,Mars-vanKrevelen,,,SCR,;,SCR,[3],,(4)SO2H2OSO2,SCR,SO2SO2SO3,SO3H2ONH3,NH4HSO4,(NH4)2SO4,,,,,[1]3(PillaredInterlayerClays,PILC),(Cross-linkingClays,CLC),,,3.1PILC,(Smectites),,Si4+,Al3+,,K+Na+Ca2+H+,PILC,PILC[5],,7Gt,60%,pH,[1011][13],,,,62121,,PILC1,,,,,3.2,,,,,,,,;,,[11],,,[11]3.3NH3,,,:(1)(),,,Lewis(2),,BronstedBronstedLewis[12]4SCR,(SCR)R.Q.Long,R.T.Yang[4][1517],SCR,CrO3-PILC,Fe2O3-PILC,TiO2-PILC,ZrO2-PILC,Al2O3-PILCSCRCrO3-PILCFe2O3-PILCTiO2-PILCZrO2-PILCAl2O3-PILC[1517],,[14],PILC,[11]FeCuCo[15]SCR,,Lang2muir-Hinshelwood[4],NONO2H2OSO2,CuTiO2-PILC(Cu-TiO2-PILC)H2OSO2,;,FeTiO2-PILC(Fe-TiO2-PILC),Fe-TiO2-PILCSO2SO3SO2,SO2,,NH3SO2,Fe-TiO2-PILC,[17],R.Q.LongR.T.Yang[16],Fe-TiO2-PILC,CeO2SCR7PrO1.83,35%SO2,,3CeNONO2,5,,,SCRSO2,,SCRNOx,SCRNOx,NOx:[1]PioForzatti,Presentstatusandperspectivesinde-NOxSCRcatal2ysis.AppliedCatalysisA:General,2001,222:221236.[2],,[J].,2005,8(2):1824.[3]GuidoBusca,LucaLietti,GianguidoRamisetal,ChemicalandmechanisticaspectsoftheselectivecatalyticreductionofNOxbyammo2niaoveroxidecatalysts:Areview.AppliedCatalysisB:Environmental,1998,18:136.[4]R.Q.Long,R.T.Yang,FTIRandKineticStudiesoftheMechanismofFe3+-ExchangedTiO2-PillaredClayCatalystforSelectiveCatalyticRe2ductionofNOwithAmmonia.JournalofCatalysis,2000,190:2231.[5],[M].:,20025.[6],,.NOx[J].,2005,24(10):10791083.[7]ScottAStevensonandJimC.Vartuli,TheSelectiveCatalyticRe2ductionofNO2byNH3overHZSM-5.JournalofCatalysis,2002,208:100105.[8]ScottAStevenson,JamesC.VartuliandCarltonF.Brooks,KineticsoftheSelectiveCatalyticReductionofNOoverHZSM-5.JournalofCatalysis,2000,190:228239.[9]R.Q.LongandR.T.Yang.SelectiveCatalyticReductionofNOwithAmmoniaoverFe3+-ExchangedMordenite(Fe$MOR):CatalyticPerformance,Characterization,andMechanisticStudy.JournalofCatalysis,2002,207:274285.[10],,.[J].,2002,21(4):247252.[11],,[M].:,19901.[12],,,[J].,2000,8(6):37.[13]V.A.Sadykovetal,Moleculardesignandcharacterizationofcat2alystsforNOxselectivereductionbyhydrocarbonsintheoxygenexcessbaseduponultramicroporouszirconiapillaredclays.TopicsinCatalysis,2005,32:12.[14]P.Canizares,J.L.Valverde,M.R.SunKouetal,SynthesisandcharacterizationofPILCswithsingleandmixedoxidepillarspreparedfromtwodifferentbetonies.Acomparativestudy.MicroporousandMesoporousMaterials,1999,29:267281.[15]R.Q.Long,R.T.Yang,SelectiveCatalyticReductionofNitrogenOxidebyAmmoniaoverFe3+-ExchangedTiO2-PillaredClayCata2lysts.JournalofCatalysis,1999,186:254268.[16]R.Q.Long,R.T.Yang,ThepromotingroleofrareearthoxidesonFe-exchangedTiO2-pillaredclayforselectivecatalyticreductionofnitricoxidebyammonia.AppliedCatalysisB:Environmental,2000,27:8795.[17]R.Q.Long,R.T.Yang,EnhancementofactivitiesbysulfationonFe-exchangedTiO2-pillaredclayforselectivecatalyticreductionofNObyammonia.AppliedCatalysisB:Environmental2001,33:97107.(2),:(),,,,,,,(3)Lagrange,:[1].[J].:,2001,46(3):254256.[2].[J].:,1999(12):8489.[3],.[J].:,2005,3(3):330333.[4].[J]..1992(1):2328.[5].[J].:(),1986(2,3):7173.[6],.[M].:,1990.(3)8212