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《ni2crxv2xo7催化劑的制備表征及其丙烷氧化脫氫性能研究》由會員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫。
1、內(nèi)蒙古師范大學(xué)碩士論文ABSTRACTThedevelopmentandapplicationofhigh—activeandhighpropyleneselectivitycatalystarevitalforoxidativedehydrogenation(ODH)ofpropanetopropylene．Ni—V-Ocatalystshavegoodcatalyticperformanceforpropaneoxidativedehydrogenationtopropyleneatlow—temperature．Inordertoobtainagoodcatalyti
2、cperformanceforpropaneoxidativedehydrogenationtopropylenebytheoptimizationofpreparationmethodandconditionsaswellasbythesubstitutionofacertainamountofchromiumforvanadium，inthisthesis，wedidthefollowingresearchwork．Atfirst，Ni2V207catalystswererespectivelypreparedbysolidgrindingmethod，solv．ent
3、evaporatingmethod，oxalateCO—precipitationandcitricacidsol—gelmethod．ThecatalystswerecharacterizedbyBETnitrogen，physisorption，X—raydiffraction，inductively·coupledplasma(ICP)atomicemissionspectroscopy,hydrogentemperature-programmedreduction(H2一TPR)，scanningelectronmicroscopy(SEM)，transmissio
4、nelectronmicroscopy(TEM)，X-rayphotoelectronspectroscopy(xPs)andTG—DTA；Theinfluencesofthepreparation‘methodsonphysicalandchemicalpropertiesofNi2V207catalystanditscatalyticbehaviorwerestudied．ThebestresultofpropaneoxidativedehydrogenationwasobtainedonNi2V207catalystpreparedwithcitricacidsol—
5、gelmethod．Inthecatalystpreparationprocess，nitrogenoxideswerenotreleased．Itisagreenenvironment—friendlypreparationmethod．Secondly,Ni2V207catalystwaspreparedbycitricacidsol—gelmethod．Theinfluenceofcalciningtemperaturesonthestructure，morphology,specificareaofNi2V207anditscatalyticperformancew
6、ereinvestigated．Besides，theeffectsofcitricaciddosageinprecursorsongelformationandcatalyticperformancewerefurtherinvestigated．TheresultsshowthattheNi2V207catalystpreparedbyneitricacid／(nNi+nv)=3andcalcinedat600。Chasagoodcatalyticperformanceforpropaneoxidativedehydrogenationtopropylene．Final
7、ly，thecatalyticperformanceofNi2V207catalystwasimprovedwithsubstitutionofchromiumforVanadium．ThebestresultofpropaneoxidativedehydrogenationtopropylenewasobtainedoverNi2Cr0．IVl．907·KEYWORDSNi2V207catalyst，Ni2CrxV2．x07，propane，oxidativedehydrogenation內(nèi)蒙古師范大學(xué)碩士學(xué)位論
