The mass transport of propane, i-butane and neopentane in zeolites: A frequency response study

Gy Onyestyák, J. Valyon, L. V.C. Rees

Research output: Contribution to journalArticle

Abstract

The sorption mass transport of C3-C5 alkanes in zeolites was studied using the frequency response (FR) rate spectroscopic method. Rate spectra were recorded in the 0 to 160°C temperature and 60 to 600 kPa pressure ranges. The studied alkanes had a fixed backbone of three carbons and different kinetic diameters depending on the number of methyl groups on the central carbon atom. The studied zeolites had 12-, 10-, or 8-member ring (MR) entrances to the intracrystalline cavities. Only propane was found to pass through the 8-MR apertures of zeolite Ca,Na-A. The diffusion resistance of 10-MR channels governed the rate of i-butane and neopentane transport in zeolite H-ZSM-5. in large pore H-zeolites, having 12-MR windows, such as, faujasite, mordenite and beta, sorption was the rate-controlling slowest step of alkane mass transport for all three sorbates studied.

Original languageEnglish
Pages (from-to)1027-1034
Number of pages8
JournalStudies in Surface Science and Catalysis
Volume158 B
DOIs
Publication statusPublished - Jan 1 2005

ASJC Scopus subject areas

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

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