Hydrogen diffusivity enhancement in alumina pellets due to impregnated palladium

Dogan M., Dogu G.

CHEMICAL ENGINEERING COMMUNICATIONS, vol.190, pp.662-676, 2003 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 190
  • Publication Date: 2003
  • Doi Number: 10.1080/00986440302122
  • Journal Name: CHEMICAL ENGINEERING COMMUNICATIONS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.662-676
  • Gazi University Affiliated: Yes

Abstract

Single-pellet moment technique was used for the evaluation of effective diffusivities and adsorption equilibrium constants of hydrogen, carbon dioxide, and helium in pure alumina and palladium-impregnated alumina pellets. It was found that hydrogen was strongly adsorbed on palladium of Pd-alumina pellets, and significant enhancement of hydrogen diffusivity was observed due to impregnated palladium at 40degreesC. On the other hand, for carbon dioxide and helium, effective diffusivities obtained in Pd-alumina pellets were smaller than the corresponding values in pure alumina due to higher tortuosity factor values of Pd-alumina pellets.