Xylene isomerization on H-mordenites and H-clinoptilolites

É Miklósy, J. Papp, D. Kalló

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10 Citations (Scopus)


The title reaction has been studied on H-forms of natural mordenite and clinoptilolite, prepared by one of the following procedures: (i) acid treatment, (ii) NH4+ exchange followed by deammoniation and (iii) Ag+ exchange followed by reduction with hydrogen. The active sites are acidic OH groups. The method of preparation affects the character of Brönsted sites and, consequently, the catalytic properties. On H(Ag)-mordenite isomerization proceeds selectively without deactivation. Consecutive monomolecular transformation of o-⇌m-⇌p-xylene occurs with rate determining surface reactions. Rate constants and adsorption equilibrium constants have been determined from kinetic data.

Original languageEnglish
Pages (from-to)139-148
Number of pages10
Issue number2
Publication statusPublished - Apr 1983



  • H-zeolites
  • Xylene isomerization
  • clinoptilolite
  • mordenite

ASJC Scopus subject areas

  • Environmental Science(all)

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