Hydrogen diffusivity enhancement in alumina pellets due to impregnated palladium

Dogan M. , Dogu G.

CHEMICAL ENGINEERING COMMUNICATIONS, cilt.190, ss.662-676, 2003 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 190
  • Basım Tarihi: 2003
  • Doi Numarası: 10.1080/00986440302122
  • Sayfa Sayıları: ss.662-676


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.