催化燃燒中Zr-Mn和La-Zr-Mn體系催化性能與結構關系的研究.pdf

1、廈門大學碩士學位論文催化燃燒中ZrMn和LaZrMn體系催化性能與結構關系的研究姓名：毛通雙申請學位級別：碩士專業(yè)：物理化學指導教師：蔡俊修19980801AbstactCatalyticcombustiontechniqueisoutstandinginprotectionofenvironmentandusageofenergiesForthisreason，Preparationandresearchofcatalystsarem

2、oreandmoreimportantThispaperpreparedZrMnsolidsolutioncatalystswithvariouspreparationmethods，especiallywithcoprecipitationmethod，inwhichthesettingwaseliminatedofwaterbyazeotropicdistillationwithn—butylalcoh01Thestructureo

3、fZrMnisCaF2typeAtthesametime，LaZrMnsolidsolutionsofstructurewerealsoprepareusingLatostabilizetheZrMncatalystsThecatalyticnaturesofabovecatalystswerestudiedincompletelyoxidizingofmethaneThespecificsurface，bulkcompositions

4、andstructures，defectfomarionconditionsandredoxabilitiesofthecatalystswerealsocharacterizedbyBET，TEM，XRD，andTPD—TPRtechniquesXRDandTPDTPRanalyticalskillsweredevelopedTheresultsofallabovestudiesshowedthecorrelationofreacti

5、vitiesandstructuresofthecatalysts1ZrMnmixedoxidecatalystTheZrMncatalystserieswerepreparedbypropionicacid，citricacidandcoprecipitafionmethods，inwhichcoprecipitationmethodswasmoresuitableCatalystoffinepropertieswasachieved

6、afterthecoprecipitatingmixturetreatbyazeotropicdistillationwith月一butylalcoh01ExperimentalresultsSuggest。cubicZr02introducedwithMnhashigherreactivitythenZr02sampleswithothercrystalphasesThecubicphaseofZr02canbestableatroo

7、mtemperaturebecauseofMnatomsintothecrystallatticeOxygenvacanciesandoxidizingreducingrecyelesareformedfortheentryofMnatomsZrMncatalystmodifiedbyMnishighlyefficienttocatalyticcombustionofmethaneThenumberofdefectswillincrea

8、sewiththeincreaseofamountsofMnintothecrystalinarangeoflimitationTheZrMncatalystswith20％(molarratio)MnishighlyeffectivebecausealargeamoantofdefectscallforminthecrystallatticenosingleMnphaseyieldsArangeofcalcinationtempera

9、tureisnecessaryfortheformationofZrMncatalystwithcubicCarlstructure，F(xiàn)orthesamplepreparedbycoprecipitionmethods，PartofCZrO，takesshapewhilethecalcinationtemperaturehigherthan550℃Until750℃，C—ZrO，transformstomZr02SoZrMncataly