Surface passivation and shape selectivity in xylene isomerization over ZSM-48

The shape selectivity of ZSM-48 in xylene isomerization is enhanced by silylating the active sites on the external surface of the zeolite crystals. On silylated Pt-ZSM-48, and Ni-ZSM-48, the para-to- ortho-xylene ratio and the 1,2,4- to 1,3,5-trimethylbenzene ratio are increased. More important, the...

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Bibliographic Details
Published in:Applied catalysis 1989, Vol.55 (1), p.265-269
Main Authors: Ratnasamy, P., Pokhriyal, S.K.
Format: Article
Language:English
Subjects:
Chemistry
Exact sciences and technology
General and physical chemistry
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
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Summary:The shape selectivity of ZSM-48 in xylene isomerization is enhanced by silylating the active sites on the external surface of the zeolite crystals. On silylated Pt-ZSM-48, and Ni-ZSM-48, the para-to- ortho-xylene ratio and the 1,2,4- to 1,3,5-trimethylbenzene ratio are increased. More important, the loss of xylenes by transalkylation reactions is suppressed.
ISSN:0166-9834
DOI:10.1016/S0166-9834(00)82333-7