meso-MO、CrO-,x--meso-MO和CrO-,x--VO-,x--meso-MO(M=Ca，Mg)的制備及異丁烷氧化脫氫催化性能研究.pdf

1、北京工業(yè)大學碩士學位論文mesoMO、CrOmesoMO和CrOVOmesoMO（M=Ca，Mg）的制備及異丁烷氧化脫氫催化性能研究姓名：劉彩欣申請學位級別：碩士專業(yè)：應用化學指導教師：戴洪興20090525Abstract攔鼉曼曼曼!曼曼曼篡燃燃鼉曼曼!皇!!!皇黑燃躺曼曼鼉曼曼曼!I曼嬲燃贈曼!曼!!!曼量曼燃燃鬯曼曼皇曼曼曼曼曼甍燃攔鼉曼曼曼曼曼曼曼曼燃燃鼉AbstractIsobuteneisakindofimportantch

2、emicalrawmaterialsandintermediatesinchemicalindustryAlthoughtheoxidativedehydrogenation(ODH)ofisobutanetoisobutenepossessesmanyadvantagesoverthehightemperaturepyrolysisprocess，thedesiredproduct(isobutene)yieldobtainedvia

3、thecatalyticpathwayisfarawayfrom也eindustrialproductionItiSshownthatthesupportedtrans撼onmetaloxide(egCrO=，V0算，MoO=，andetc)catalystsperformwellintheselectiveoxidationoflightalkanesMesoporousmaterialsareoffullporousstructur

4、esandhigh‘surfaceareas，whicharefavorableforthedispersionofactivecomponents，thusgeneratinghighlyeffectivecatalyatsforcertainreactionsIIltmSthesis，mesoporousalkalineearthmetaloxides(meso一肋r0∽=CaandMg))werefabricatedbyusing

5、surfactantassistedhydrothermalstrategyandYCrOJmeso潲andyCrOfllOVO=／meso一潲◇denotestheweightpercentageofCr203andy=l～l2訊％；10VOflmesoMOmeans10wt％V205／meso—MO)catalystswerepreparedbyadoptingtheincipientwetnessimpregnationmetho

6、dnlephysicochemicalpropertiesoftheseporousmaterialswerecharacterizedbymeansofthetechniquessuchasX—raydit蠹action，scanningelectronmicroscopytransmissionelectronmicroscopyselected—areaelectrondiffraction，temperature—program

7、medreduction，temperatureprogrammeddesorption，andN2adsorptiondesorptionmeasurementsThecatalyticactivitiesofYCrOx／meso—MOandYCrOftlOVOflmeso涮0fortheOD囂ofisobutaneweredetermined。Itisshownthat謝thnonporousCaOparticlesasthesta

8、rtingmaterialviatheP123一，Cn鏹一orPEGassistedhydrothermaldissolutionrecrystallizationpathwaywormhole—likemesoporousnano—andmicrosizedsingle—crystallinemesoCaOdisplayingtri一，tetra，andhexagonalmorphologiescouldbefabricated簌愨e

9、rcalcinationofthemixtureobtainedhydrothermally強emesoCaOsamplesynthesizedhydrothermallywithPEGat240oCfor72handaftercalcinationat600oCfor3hpossessedthehighestsurfaceareaof257mog，姒mthecorrespondingaverageporesizeandporevolu

10、mebeing33nrnand0。25cm3／g，respectively強eaS—fabricatedmeso—CaOmaterialsexhibitedallunusuallylargecapacityforC02adsorptionThemesoCaOsinglecrystalliteswithsuperbasicityandwormhole—likemesoporousarchitecturesaresuitableforthe

11、useasacidicadsorbent，catalyst，andsupport?；resultsofactivityevaluationrevealthattheyCrOJmeso掰0and夕CrOJlOVOflmesoMOcatalystswi也goodmesoporousstructuresexhibitedexcellentcatalyticperformanceforthe0DHofisobutaneUnderthecond