一氧化碳催化偶聯(lián)合成草酸二乙酯催化劑研究

1、天津大學碩士學位論文一氧化碳催化偶聯(lián)合成草酸二乙酯催化劑研究姓名：田克勝申請學位級別：碩士專業(yè)：化學工藝指導教師：王保偉20070101ABSTRACTSynthesisofdiethyloxalate(DEO)viacatalyticcouplingreactionofCOandethylnitrite(EN)isanenvironmentbenignandatomiceconomicprocessTheeffectingfactor

2、sofcatalyticactivities，suchasPdloadingamount，promotersandtheplasmatreatmentonthecatalysts，wereinvestigatedinthispaperbasedOllformerachievementsonthissubjectnecatalystswereevaluatedinthefixedbedreactorwith5mLcatalystTheex

3、perimentswerecarriedoutoncatalystinthesamereactionconditionofCO25％，ethylnitrite15％，nitrogen60％，theresidencetime18sandtemperatureof373K一393KAseriescatalystwaspreparedbyimpregnationmethodwithPdloadingsintherangeO420wt％Ther

4、esultsindicatedthatthecatalyticactivityofO8％Pd／A1203wasthehi曲estamongallthecatalystsTheinfluenceofpromoterWasalsostudiedLa，Ce，Ti，CuFe，CoandLipromoterswereaddedinthenewcatalysts，respectivelyThecatalystswerepreparedbytheim

5、pregnationmethodTheresultsshowedthatthecatalystsdopedLaorCecanobviouslyimprovecatalyticperformanceThemolarratioofLa／PdandCe／PdwerefurtherinvestigatedinthelaterexperimentsTheresultsindicatedthatthecatalystsreachedthebestc

6、atalyticcapabilitywhenLa／Pd(molratio)is05andCe／Pd(molratio)is10Meanwhile，thecatalystswerecharacterizedbyBETTEM，XPSandICBrespectivelywhichcanprovidetheusefulinformationofthecatalystsThecatalystsincludingLa，Ce，Ti，andFeprom

7、oterswereinvestigatedattertheyweretreatedwithplasmamethodunderthenitrogenorhydrogenenvironmentTheperformanceofcatalyststreatedunderthehydrogenenvironmentisbetterthanthatundernitrogenenvironmentComparingtheplasmatreatedca

8、talystwithuntreated，theSTYofDEOandtheconversionofCOonLaPd／ot—A1203catalystincreased78％and83％；andtheSTYofDEOandtheconversionofC0onCePd／aA1203(2040mesh)catalystincreased238％and251％Combiningwiththecatalystscharacterizationr