A frequency-response study of diffusion and adsorption of C1-C5 alkanes and acetylene in zeolites

Gy Onyestyák, J. Valyon, L. V.C. Rees

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3 Citations (Scopus)


The dynamics of methane, propane, isobutane, neopentane and acetylene transport was studied in zeolites H-ZSM-5 and Na-X by the batch frequency response (FR) method. In the applied temperature range of 273-473 K no catalytic conversion of the hydrocarbons occurred. Texturally homogeneous zeolite samples of close to uniform particle shape and size were used. The rate of diffusion in the zeolitic micropores determined the transport rate of alkanes. In contrast, acetylene is a suitable sorptive for probing the acid sites. The diffusion coefficients and the activation energy of isobutane diffusion in H-ZSM-5 were determined.

Original languageEnglish
Pages (from-to)587-592
Number of pages6
JournalStudies in Surface Science and Catalysis
Publication statusPublished - Jan 1 2000


ASJC Scopus subject areas

  • Catalysis
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

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