Gas diffusion in Bi-disperse porous catalyst pellets

Xiufeng Liu, Baoquan Zhang, Jerry Lin

Research output: Contribution to journalArticle

4 Scopus citations

Abstract

A flux equation of diffusion for bi-disperse porous catalyst pellets was proposed by modifying the previously developed model equation over fractal trajectories. The proposed fractal model equation considered the same tortuous degree for both micro-and macro-pores. The experimental data of diffusion over a bi-disperse Ni/gamma-alumina pellet were obtained with a standard Wicke-Kallenbach diffusion cell for both carbon monoxide-ethylene and carbon dioxide-ethylene binary mixtures. The fitting between experimental results and the fractal model equation leads to a fractal dimension of 1.11. The prediction of diffusion flux over the bi-disperse Ni/gamma-alumina pellet by the proposed fractal model equation is much better than the traditional tortuosity-based model equation by comparison with the measured flux through the pellet.

Original languageEnglish (US)
Pages (from-to)471-476
Number of pages6
JournalChinese Journal of Chemical Engineering
Volume13
Issue number4
StatePublished - Aug 1 2005

Keywords

  • Catalyst
  • Diffusion
  • Fractal
  • Porous media

ASJC Scopus subject areas

  • Environmental Engineering
  • Biochemistry
  • Chemistry(all)
  • Chemical Engineering(all)

Fingerprint Dive into the research topics of 'Gas diffusion in Bi-disperse porous catalyst pellets'. Together they form a unique fingerprint.

  • Cite this