堇青石蜂窝陶瓷载体涂层的制备研究

264200812()J.ofXuzhouNormalUniv.(NaturalScienceEdition)Vol.26,No.4Dec.,2008:2008-05-12:(07KJB150112);(07XLA06):(1973-),,,,,.田久英,卢菊生,吴宏(,221116):,HNO3,AlOOH,.HNO3;(BET);.,5%~8%,n(H+)/n(AlOOH)=0106~0110,,HNO3,,,.:;;:O643:A:1007-6573(2008)04-0068-04(2MgO#2Al2O3#5SiO2),(TWC,Three-wayCatalyst),(1m2#g-1),.C-Al2O3[1-2],C-Al2O3[3-4],,,CeO2-ZrO2-M2O3[5-6].C-Al2O3,,[7-8].,.,,,,,.,,.1溶胶的制备,,,,3mol#L-1,,.涂层的制备(62/cm2,:10mm@25mm),30min,,,,120e12h,500e5h.测试方法SYP1003-6,,.PHS-3CpH.(BET)MicromeriticsASAP2010.KUDOS-SK250H,250W,53kHz,,20min,,,:$W=W1-W2W1@100%,W1(g);W2(g).2211n(H+)/n(AlOOH)=0.10,,1.,5%~8%,,;8%,.,,,,.,,-,;,,,.212,.,H+,,,,,,.,8%,,2.,n(H+)/n(AlOOH)0104~0110,,,.n(H+)/n(AlOOH)0110,.,.,,,,.1Fig.1Effectofpseudo-boehmitecontentonviscosityofcolloid2n(H+)/n(AlOOH)Fig.2Effectofn(H+)/n(AlOOH)onviscosityofcolloid213HNO3,H+,NO-3,.,,,.HNO3,,,.HNO3,,NO-3,,,.,.8%,96h,,3.,n(H+)/n(AlOOH)0106~0110,,pH,.n(H+)/n(AlOOH)0104,pH,,,694,:12h,.,,,,,.,,,.214,,3,4.,,;,,.,,,.,,,.,8%,,,,,,,.,3,5%~8%,,.3pHFig.3EffectofrestingtimeonpHvalueofcolloid4Fig.4Effectofpseudo-boehmitecontentontheloadingpercentageandreproducibilityofwashcoat2151Tab.1AdhesionofcoatingofdifferentAlOOHcontenttestedwithultrasonicvibration%w(AlOOH)$W55125218911260158651682182111601567612321921130015986178218611220152,,,.,3,1.,,,,,.,,,,.216(1m2#g-1),,,.,..,,1122m2#g-1,70()2626151m2#g-1,.,,,62.219nm,,,,4.568nm,,,,.3,HNO3,HNO3,,;8%,n(H+)/n(AlOOH)0110,,.,,,,7%~8%,n(H+)/n(AlOOH)0108~0110.:[1]RothD,GelinP,TenaE,etal.CombustionofmethaneatlowtemperatureoverPdandPtcatalystssupportedonAl2O3,SnO2andAl2O3-graftedSnO2[J].TopicsinCatalysis,2001,16/17(1-4):77.[2]ZotinFMZ,GomesOFM,OliveiraCH,etal.Automotivecatalystdeactivation:Casestudies[J].CatalysisTo-day,2005,107-108:157.[3]KucharczykB,TylusW,KepinskiL.Pd-basedmonolithiccatalystsonmetalsupportsforcatalyticcombustionofmethane[J].ApplCatalysisB:Environ,2004,49(1):27.[4]ShinjohH,TanabeT,SobukawaH,etal.EffectofBaadditiononcatalyticactivityofPtandRhcatalystsloadedonC-Al2O3[J].TopicsinCatalysis,2001,16/17(1-4):95.[5],,.CeO2-ZrO2[J].:,2006,24(1):72.[6],,.Ce016Zr0135RE0105O2(RE=Y,La,Nd,Pr)[J].:,2007,25(3):58.[7]LuoMengfei,HeMai,XieYunlong,etal.TolueneoxidationonPdcatalystssupportedbyCeO2-Y2O3washcoatedcordieritehoneycomb[J].ApplCatalysisB:Environ,2006,69(3-4):213.[8]JiangPingping,LuGuanzhong,GuoYanglong,etal.PreparationpropertiesofaC-Al2O3washcoatdepositedonace-ramichoneycomb[J].Surface&CoatingsTechnology,2005,190(2-3):314.PreparationofWashcoatDepositedonCordieriteHoneycombSubstrateTIANJiu-ying,LUJu-sheng,WUHong(SchoolofChemistry&ChemicalEngineering,XuzhouNormalUniversity,Xuzhou,Jiangsu,221116,China)Abstract:AlOOHcolloidwaspreparedwithpseudo-boehmiteasrawmaterialandHNO3asdis-pergator.Thepreparedcolloidwasbeusedaswashcoatmodifierforcordieritehoneycombsubstrate.Theinfluencesofthepseudo-boehmitecontentandacidityofAlOOHcolloidontheviscosityandsta-bilityofcolloid,theloadingpercentageofwashcoatwereinvestigated.ThespecificsurfaceareaofwashcoatwasmeasuredbyBETmethod.Theadhesionofaluminawashcoatwasdeterminedbyultra-sonicvibration.Theresultsshowthat,whenthepseudo-boehmitecontentis5%~8%andn(H+)/n(AlOOH)is0106~0110,astablecolloidwasobtained,theviscosityofAlOOHcolloidin-creaseswithpseudo-boehmitecontentoracidityofcolloid,leadingtoincreasetheloadingpercentageofwashcoatdepositedoncordieritehoneycombsubstrate.Thepseudo-boehmitecontenthasnoimpor-tanteffectonthereproducibilityandadhesionoftheloadingwashcoat.Keywords:preparation;honeycombceramicsubstrate;washcoat714,: