Gas permeation and diffusion in small and intermediate pore zeolite membranes

Jerry Lin, M. Kanezashi

Research output: Chapter in Book/Report/Conference proceedingChapter

8 Scopus citations


Success in synthesis of defect free small or intermediate pore zeolite membranes allows study of permeation and diffusion of small gases such as hydrogen in these zeolites at high temperatures. This paper reports experimental data of permeation for small gases including hydrogen, helium, carbon dioxide and carbon monoxide through the small pore DDR zeolite membrane and the intermediate pore MFI type silicalite membrane in 25-500°C. Due to small ratio of molecule size to silicalite pore diameter, permeation and diffusion of the small gas molecules in silicalite membrane exhibit characteristics of Knudsen diffusion. The permeance decreases with increasing temperature and is determined by the molecular weight, not the kinetic diameter of the molecules. Gas permeance through the small pore DDR membrane shows activated diffusion characteristics, with permeance increases with temperature and decreases with increasing molecule size of the permeating gases. These permeance and diffusion data can be explained by the gas translation diffusion model.

Original languageEnglish (US)
Title of host publicationFrom Zeolites to Porous MOF Materials - The 40th Anniversary of International Zeolite Conference
PublisherElsevier Inc.
Number of pages8
ISBN (Print)0444530681, 9780444530684
StatePublished - 2007

Publication series

NameStudies in Surface Science and Catalysis
ISSN (Print)0167-2991

ASJC Scopus subject areas

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


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