ni2crxv2xo7催化剂的制备表征及其丙烷氧化脱氢性能研究

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1、内蒙古师范大学硕士论文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内蒙古师范大学硕士学位论