负载型Pt、Cu催化剂上异辛烷中有机硫化物的空气氧氧化脱除的分析

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1、ItwasfoundthatreactiontemperatureWascrucialtoe2&吼ⅡethemaintainanceofcatalystreactivityfortheAODSprocess．Atreactiontemperaturebelow300oC，thecatalystreactivitydegradedquickly,sinceS02productofAODSwollldchemisorbedonthecatalystsurfacetoformsulfateorsulfi

2、tetherebyleadingtocatalystpoisoning．Atreactiontemperatureof300oC，however,S02productcouldescapeeasilyfromthecatalystsurface谢也theresultthatthecatalystreacti哪remainedalongwiththereactiontime．ItisalsofoundthatS02istheuniquesulfur-containingproductionineit

3、herliquidphaseeffluentorinthegasphaseeffluent，ascertainedbyGC—PFPDandGC·MSmmlyses．EffectsofCeandCucontentsandthecalcinationtemperatureontheAODSperformanceofCu／Ce／Si02catalystshavebeenstudied．ItwasfoundthattheoptimalCuandCecontentsare5wt％andlOwt％，respe

4、ctively．Theoptimalcalcinationtemperaturesareall450oCinthestepofloadingCeonSi02andinthesubsequentfstepofloadingCuontheas—madeCe／Si02．BycorrelatingthereactionresultswiththecatalystinformationprovidedbyN2-BET，XRDandHE—TPRmeasurements，itissuggestedthatgoo

5、dcrystallizationofCe02，hi曲copperdispersionandstronginteractionbetweenCuandCe02attheirinterfacearefavourableforAODSperformanceoftheCu／Ce／Si02catalysts．Inaddition,Pt／Ce02，CuO／Ce02and5％Cu／10％Ce／Si02catalystsallprovidegoodreactivityforAODSofvariousorgano-

6、sulfurcompoundsblendediniso‘octaneat300oC．Atequivalentorgano-sulfurconversionof95％at300。C，overPt／Ce02catalystthereactivityofvariousorgano—sulfurcompoundsdecreaseintheorderof1-pentanthoil>dibutylsulfide>benzothiophene>thiophene>dibenzothiophene．InsituD

7、RIFTSspectraforadsorptionoforganosulfurcompoundsorthesurfaceofPt／Ce02catalystrevealthattheorganosulfurcompoundsCanbedeeplyoxidizedbythesurfacelatticeoxygenofthePt／Ce02catalystinto502，C02andtraceCO．Moreover,thepresenceof02moleculorsfacilitatestheoxidat

8、ionoforgano·sulfurcompounds．Keywords：catalysis；oxidativedesulfurization；oxygen；catalyst；copper；platinum；切．situDRIFTS．Ⅵ学位论文独创性声明本人所呈交的学位论文是我在导师的指导下进行的研究工作及取得的研究成果。据我所知，除文中已经注明引用的内容外，本论文不包含其他个人已经发表或撰写过的研究成果。对本文的研究做出重要贡献的个人和集体，均已在文中作了明确说明并表示谢意。-，