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1、Mn基催化劑上VoCs催化氧化性能研究4、以O(shè)MS．2為前驅(qū)體，采用浸漬法制備了系列AI／OMS．2催化劑，并考察了其對(duì)CH2C12的催化氧化性能和熱穩(wěn)定性，活性結(jié)果表明隨著燦負(fù)載量的增加催化劑對(duì)CH2C12的氧化的活性先增加后降低。H2．TPR結(jié)果表明1．0AI／OMS．2催化劑的還原峰向低溫方向偏移，表明了該催化劑具有更好的氧化還原性能。當(dāng)Al的負(fù)載量超過(guò)1％后活’性進(jìn)一步降低，其原因還待進(jìn)一步探究。此外AI／OMS．2催化劑具有較好的反應(yīng)穩(wěn)定性。關(guān)鍵詞：錳基催化劑；二氯甲烷；催化氧化；OMS．2分子篩Ⅱdl
2、●■f一卜}j§IflI‘_l{^Jt‘；t}t-●lIlt擎i■●、，’，●STUDYOFCATAIⅣTICCOMBUSTIONOFVOCsOVERⅣ川GANESE．BASEDCATAIYSTSABSTRACTCatalyticcombustionisaneffectivetechniquefortheeliminationofvolatileorganiccompounds(VOCs)duetoitslowenergyconsumptionandhighefficiency．Also，catalyticcom
3、bustionhasbeenpaidmuchattentionforitssimpleequipmentrequirement，safeoperationandmoreimportantlywithoutassociatedpollutionsuchasnitrogenoxides(NOx)productionduringtheprocess．HiglllyactivecatalystisthekeytOcatalyticcombustion．FortheeliminationofVOCsincludingchl
4、orinatedvolatileorganiccompounds(CVOCs)，noblemetalcatalystsandCr-basedcatalystsareusuallyemployed．NoblemetalcatalystssuchasPdandAuhavebeenprovedtobeveryeffective；however,thehighcostsofthecatalystslimittheirapplications．FortheCr-bascdcatalysts，theyshouldbecare
5、fullytreatedbecauseoftheirtoxicity．butthehavepracticallimitationsforthehighprice．Somechromium-basedcatalystshavetoxicSOwehadbetternottousethemfi'eely．Someothernon-noblemetalcatalystswerealsoreported，buttheyoftenhavelowactivities．Therefore，theaimofthisthesisis
6、todevelopeconomiccatalystswithhighefficiencyThemainscontentsofthethesisareasfollows：1．AseriesofCel．xMnx02catalystswerepreparedusingasol—gelmethodandtestedforcatalyticoxidationofCH2C12．TheresultsindicatedthatthesecatalystswerehighlyactiveintheoxidationofCH2C12
7、，withacompleteoxidationtemperatureof480oC．TheXRDresultssuggestedthatsolidsolutionwasformedduetotheincorporationofMnintheCc02lattice．TheXPSresultsindicatedthattheMnspeciesinthecatalystswereinoxidationstatesof+3and+4．TheH2．TPRshowedthattheadditionofCeinthecatal
8、ystremarkablyloweredthereductiontemperatureofthelatticeoxygeninMnOx．TheintrinsicreactivitycalculatedbasedontheMncontentinthecatalystfollowedtheorderofCCO．8Mn0．202>Cco．6Mn0．402>Cco．5Mno．50
