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1989•The Canadian Journal of Chemical EngineeringRequires access

Olefin conversion over zeolite H‐ZSM‐5

Graeme W. Norval, M. J. Phillips, Kuljit S. Virk, R. Simons

Open publisher page 12 citations

Abstract

Abstract The conversion of propene, 1‐butene and 2‐methylpropene over zeolite H‐ZSM‐5 has been studied in the temperature range 663–773 K. While propene and 1‐butene yield similar products, that from 2‐methylpropene contains less aromatics, but a greater fraction of xylenes. The time on stream behaviour of the aromatics from this latter olefin demonstrates that the difference in product yield and selectivity is due to pore mouth blockage resulting from the formation of iso‐butyl cations on the external zeolite surface.

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What this paper is about

Abstract The conversion of propene, 1‐butene and 2‐methylpropene over zeolite H‐ZSM‐5 has been studied in the temperature range 663–773 K. While propene and 1‐butene yield similar products, that from 2‐methylpropene contains less aromatics, but a greater fraction of xylenes. The time on stream behaviour of the aromatics from this latter olefin demonstrates that the difference in product yield and selectivity is due to pore mouth blockage resulting from the formation of iso‐butyl cations on the external zeolite surface.

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Available abstract

Abstract The conversion of propene, 1‐butene and 2‐methylpropene over zeolite H‐ZSM‐5 has been studied in the temperature range 663–773 K. While propene and 1‐butene yield similar products, that from 2‐methylpropene contains less aromatics, but a greater fraction of xylenes. The time on stream behaviour of the aromatics from this latter olefin demonstrates that the difference in product yield and selectivity is due to pore mouth blockage resulting from the formation of iso‐butyl cations on the external zeolite surface.

Key concepts: Propene, Zeolite, Olefin fiber, Yield (engineering), Selectivity, Chemistry, Butene, Catalysis

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