Break-in and deactivation of ZSM-5 during ethylation of toluene

J. Engelhardt, M. Szabó, D. Kalló

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Catalysts with 0, 4, 8, and 12% MgO content were prepared by impregnation of NH4ZSM-5 with Mg (NO3)2 + MG (CH3CO2)2 followed by heating at 973 K. Alkylation of toluene with ethylene in nitrogen or hydrogen carrier gas was carried out on these catalysts at 673 K in a laboratory-scale fixed-bed downflow reactor made of quartz. The amount of coke deposited as well as the acidity and pore volume of the coke-containing catalyst were determined. In the early stage of the reaction, defined as the break-in period, the yield of ethyltoluenes increased and the yield of side products decreased with time on stream. Phenomena in the break-in period were explained by partial deactivation due to coke deposition.

Original languageEnglish
Pages (from-to)916-924
Number of pages9
JournalZeolites
Volume12
Issue number8
DOIs
Publication statusPublished - Jan 1 1992

Keywords

  • Alkylation
  • ZSM-5
  • break-in
  • coke formation
  • deactivition
  • para-selectivity
  • tolune

ASJC Scopus subject areas

  • Environmental Science(all)

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