1,2-二氯丙烷制環(huán)氧丙烷FeAl(PO-,4-)-,2-催化劑及膜催化反應(yīng)的研究.pdf_第1頁(yè)
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1、天津大學(xué)博士學(xué)位論文1,2二氯丙烷制環(huán)氧丙烷FeAl(PO)催化劑及膜催化反應(yīng)的研究姓名:顧修君申請(qǐng)學(xué)位級(jí)別:博士專業(yè):工業(yè)催化指導(dǎo)教師:鐘順和20021001ABSTRACTAseriesofphosphatecatalystsandKieselguhr—MulliteceramicsupportedSi02一Fe203membranetubeshavebeenpreparedandusedascatalystandmembraner

2、eactorforl,2dichloropropanedechloroxidationformingtopropyleneoxide,inordertoincreasetheconversionofl,2dichloropropaneandtheselectivitytopropyleneoxideThisworkmainlyfocuseson:(1)Aseriesofphosphatecatalystshavebeenprepared

3、byprecipitationmethodandsol—gelmethodrespectivelyTheeffectsofpreparingmethodmaterialsconditionsofdryingandcalcinationonthepropertiesofthecatalystshavebeeninvestigatedUnderaproperpreparingconditions,anamorphousFeAI(P04)2c

4、atalystwiththespecificareamorethan90lo/gandtheparticlesizeabout10nmwasobtained(2)H20adsorbsonphosphateMofLewisacidsitesM—ObondandoxygenofLewisbasesitesP=Obondinmolecularstateanddissociativestate,withMrepresentingFeorA1H2

5、0adsorbsonA1P04catalystinmolecularstate,butH20adsorbsonFeP04andFeAI(P04)2catalystsinmolecularstateanddissociativestate12dichloropropaneadsorbsonphosphateMofLewisacidsitesM—Obondinmolecularstate111eacidityofLewisacidsites

6、andthebasicityofLewisbasesitesinfluencetheintensitybetweenwater12dichloropropaneandcatalystThespecificareaofcatalystinfluencesthecapacityofadsorption(3)It20adsorbsonFeAI(P04)2atthesynergisticactionofLewisacidsitesandLewi

7、sbasesitesindissociativestateandformsP—OHandFe—O一then12dichloropropaneabsorbsonP—OHandformsHClandintermediateproductpropeneafteractionPropeneactswithFe—O—andformspropyleneoxideUsingamorphousFeAI(P04)2ascatalyst,1,2dichlo

8、ropropaneconventionrateandpropyleneoxideselectivityare863%and879%respectivelyunderaproperreactioncondition(4)KieselguhrMullitemembranesupports,withuniformmicrostructure,betterstrengthcharacterandpermeabilityhavebeensucce

9、ssfullypreparedbyextrusionItspore—sizeconcentratesaround201#m,stackingdensityisabout158g/cm’,theinterspaceratiosis47O%andthesidecompressivestrengthis1340MpaEffectsoforiginalparticlesizeofkieselguhrplasiticizerandextrusio

10、nmouldontheprocessinghavebeenstudiedEffectsofdryconditionsandsinteringsystemstothepropertiesofsupportshavealsobeenanalyzedBasedonthediscussion,preparationconditionsandmethodologyhavebeenproposed(5)Kieselguhr—Mullitesuppo

11、rtedSi02intermediatemembraneandSi02Fe203separationmembranehavebeenpreparedbysol—gelmethodandsol—gel—templatetechniquerespectivelyPerfectSi02membraneandSi02一Fe203membrane,withgoodmicromorphologyuniformporesizedistribution

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