Enhanced Pt dispersion and catalytic properties of NaCl-promoted Pt/MFI zeolite catalysts for propane dehydrogenation

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外文摘要：A simple and scalable method is presented for preparing propane dehydrogenation catalysts with superior catalytic properties.Pt distribution is significantly improved when the platinum precursor and a large amount of NaCl are introduced into the MFI zeolite by impregnation,and after calcining and fixing the active components in the insoluble form,the excess of inert salt is washed with water.NaCl promotes Pt dispersion,prevents sintering during calcination,and effectively suppresses zeolite acidity.Washing after the calcination of Pt-containing catalysts further increases the catalyst activity and stability due to the redispersion of water-soluble chlorinated Pt compounds.High external surface acid site concentrations,Na/Pt atomic ratios of 40-70,calcination temperatures of 400-500 ℃,washing with water,and the order of component introduction when the excess NaCl and the precursor of Pt are calcined jointly contribute to improved Pt dispersion and catalyst stability.

外文关键词：

Propane dehydrogenationZeolitePt/MFIImpregnationDispersionWashing

作者：

Andrey B.Ponomaryov、Andrei V.Smirnov、Elena V.Pisarenko

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作者单位：

A.N.Nesmeyanov Institute of Organoelement Compounds,Russian Academy of Sciences(INEOS RAS),Vavilova St 28,119991,Moscow,Russia

Department of Chemistry,Lomonosov Moscow State University,Leninskiye Gory 1,bid.3,119991,Moscow,Russia

Department of Cybernetics of Chemical Technological Processes,D,Mendeleev University of Chemical Technology of Russia,Miusskaya sq.9,125047,Moscow,Russia

出版年：

2022

DOI：

10.1016/j.micromeso.2022.112010

Microporous and mesoporous materials

EISCI

ISSN：1387-1811

年,卷(期)：2022.339

被引量8
参考文献量64