Hydrogen diffusivity enhancement in alumina pellets due to impregnated palladium
CHEMICAL ENGINEERING COMMUNICATIONS, cilt.190, ss.662-676, 2003 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 190
- Basım Tarihi: 2003
- Doi Numarası: 10.1080/00986440302122
- Dergi Adı: CHEMICAL ENGINEERING COMMUNICATIONS
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.662-676
- Gazi Üniversitesi Adresli: Evet
Özet
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.