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1、天津大學(xué)博士學(xué)位論文MFI型取向分子篩膜的制備與應(yīng)用姓名：郎林申請(qǐng)學(xué)位級(jí)別：博士專(zhuān)業(yè)：工業(yè)催化指導(dǎo)教師：張寶泉20090101AbstractZeolitemembraneshaveadvantagessuchaspreciselydefinedporestructure，controllablecatalysisbasedcharacteristicsandhighstabilitywhichcouldenableapplicatio

2、nsingasorliquidseparations，catalyticmembranereactors，photoelectricmaterials，andhostforchemicalsensorsMFIzeolitecrystal(ZSM5)hasatwodimensionalsystemofintersectingchannelswithsubnanometerporesize(O55nm)Becauseofitsuniquem

3、olecularsievingeffectandselectivelycatalyticperformances，MFIzeolitemembranecanbeusedforseparationofmanyindustriallyimportantcompoundsandcatalysisofthepartialoxidationofC1toC6hydrocarbonsThus，MFIzeolitemembranesareconside

4、redasoneofthemostpotentialzeolitemembranesThankstoitsanisotropicporestructure，theorientednanometersizedporenetworkofconstituentmicrocrystalsinaMFIzeolitemembraneCansignificant—lyaffectitsmolecularsievingeffectandpermeati

5、onandcatalyticperformances，whicharecrucialforpracticalapplicationsinvariousfieldsInrecentyears，therefore，therehasbeengrowinginterestinthepreparationandapplicationsoforientedMFIzeolitemembranesThecoreofthisthesisistoprepa

6、retheorientedpuresilicaMFIandtheorientedtransitionmetalheteroatomFeMFIzeolitemembranesMuchattentionhasbeenpaidtotherelationbetweenthenanometersizedzeoliticporenetworkinaMFIzeolitemembraneanditspermeationandcatalyticperfo

7、rmancesTheeffectofthemicrostructureandchemistryoftheporoussubstratesurfaceonthegrowthofzeolitefilmwasfirstlyinvesitigatedindetail，whichconfirmedthattheorientationandmicrotructureofSi—MFIzeolitefilmson僅A1203supposedsilica

8、—zirconialayersweredominantlycontrolledbythechemicalnatureofthesubstratesurfaceTheabundanceoforganicfunctionalgroupscouldbesuccessfullyseededontothesubstratesurfacebymodification，wherethefunctionalgroupsservedasthestruct

9、uredirectingmatrixtoinducetheorientationandgrowthofthezeolitecrystalswiththeirbaxesperpendiculartothesubstratesurfaceInthepresentstudywefirstlyfabricatedaclose—packed6orientedmonolayerSiMFIfilmsuppoaedbyathinchitosanfilm

10、，andprovidedthedirectspecifichigh—resolutionTEMandhighpressDSCevidencetoillustratethetrueevolutionofzeolitefilmsduringin—situhydrothermalsynthesisThisapproachgivesUSauniqueopportunitytoexplaintheselfassemblymechanismofpu

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