Titre du document / Document title

Hydrogen production by steam reforming of methanol

Auteur(s) / Author(s)

IWASA Nobuhiro ⁽¹⁾ ; NOMURA Wataru ⁽¹⁾ ; MAYANAGI Tomoyuki ⁽¹⁾ ; FUJITA Shin-Ichiro ⁽¹⁾ ; ARAI Masahiko ⁽¹⁾ ; TAKEZAWA Nobutsune ⁽¹⁾ ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

⁽¹⁾ Division of Materials Science and Engineering, Graduate School of Engineering, Hokkaido University, Kira-ku N1W8, Sapporo-shi, Hokkaido 060-8628, JAPON

Résumé / Abstract

Steam reforming of methanol, CH₃OH + H₂O → 3H₂ + CO₂, was carried out over Cu/ZnO and various supported group 8-10 metal catalysts. Over Cu/ZnO catalysts prepared by a coprecipitation method, the steam reforming of methanol occurs with high selectivity regardless of composition of the catalyst and structure of the precursor (aurichalcite, malachite, hydrozincite or their mixture). The Cu/ZnO catalysts prepared from the aurichalcite precursor are more active than those prepared from other precursors. By contrast, over supported group 8-10 metal catalysts, such as supported Pd, Pt, Co, Ni, Rh, Ir and Ru catalysts, hydrogen and carbon monoxide are predominantly produced by decomposition of methanol, CH₃OH → 2H₂ + CO. The selectivity for the steam reforming is lower than those over Cu/ZnO catalysts. However, the selectivity for the steam reforming is markedly improved upon the previous reduction of Pd/ZnO, Pd/Ga₂O₃, and Pd/In₂O₃ at higher temperatures. Upon addition of Zn to the supported Pd catalysts, the selectivity for the steam reforming and the rate of hydrogen formation are markedly increased. Over Zn modified Pd/CeO₂ catalyst, the selectivity attains to 99.0%, being comparable to Cu/ZnO catalysts. Combined results with temperature programmed reduction, XRD, XPS and AES measurements revealed that PdZn alloy was formed by the previous reduction of Pd/ZnO or Zn modified pd/CeO₂ catalyst. Catalytic functions of Pd are greatly modified upon the formation of PdZn alloys.

Revue / Journal Title

Journal of chemical engineering of Japan   ISSN 0021-9592   CODEN JCEJAQ 

Source / Source

Congrès
Congress of Asian Pacific Confederation of Chemical Engineering N^o9, Christchurch , NOUVELLE-ZELANDE (29/09/2002)
2004, vol. 37, n^o 2 (260 p.)  [Document : 8 p.] (19 ref.), [Notes: Selected papers], pp. 286-293 [8 page(s) (article)]

Langue / Language

Anglais

Revue : Multilingue ; Anglais

Editeur / Publisher

Society of Chemical Engineers, Tokyo, JAPON  (1968) (Revue)

Mots-clés anglais / English Keywords

Catalytic reaction ; Programmed temperature ; Precursor ; Coprecipitation ; Catalyst ; Carbon dioxide ; Steam reforming ; Hydrogen production ;

Mots-clés français / French Keywords

Réaction catalytique ; Température programmée ; Précurseur ; Coprécipitation ; Catalyseur ; Carbone dioxyde ; Reformage vapeur ; Production hydrogène ;

Mots-clés espagnols / Spanish Keywords

Reacción catalítica ; Temperatura programada ; Precursor ; Coprecipitación ; Catalizador ; Carbono dióxido ; Reformación vapor ;

Localisation / Location

INIST-CNRS, Cote INIST : 14467, 35400011194033.0220