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Titolo:
Effect of metal composition on hydrogen selectivity in steam reforming of methanol over catalysts prepared from amorphous alloys
Autore:
Takahashi, T; Inoue, M; Kai, T;
Indirizzi:
Kagoshima Univ, Fac Engn, Dept Appl Chem & Chem Engn, Kagoshima 8900065, Japan Kagoshima Univ Kagoshima Japan 8900065 em Engn, Kagoshima 8900065, Japan
Titolo Testata:
APPLIED CATALYSIS A-GENERAL
fascicolo: 1-2, volume: 218, anno: 2001,
pagine: 189 - 195
SICI:
0926-860X(20010925)218:1-2<189:EOMCOH>2.0.ZU;2-Z
Fonte:
ISI
Lingua:
ENG
Soggetto:
PD;
Keywords:
amorphous Cu-Zr alloy; methanol steam reforming; gold content; hydrogenation selectivity;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
9
Recensione:
Indirizzi per estratti:
Indirizzo: Takahashi, T Kagoshima Univ, Fac Engn, Dept Appl Chem & Chem Engn, Kagoshima 8900065, Japan Kagoshima Univ Kagoshima Japan 8900065 shima 8900065, Japan
Citazione:
T. Takahashi et al., "Effect of metal composition on hydrogen selectivity in steam reforming of methanol over catalysts prepared from amorphous alloys", APP CATAL A, 218(1-2), 2001, pp. 189-195

Abstract

Methanol steam reforming was carried out over catalysts prepared from amorphous Cu50Zr50, (Cu50Zr50)(100-x)Au-x and (Cu50Zr50)(100-x)Pd-x alloys in afixed bed reactor operated at atmospheric pressure. The selectivity for carbon dioxide, which is a measure of steam reforming, was dependent on the composition of the amorphous alloy. When the reaction was performed over Cu50Zr50 amorphous alloy, the selectivity for carbon dioxide was essentially unity, whereas methanol conversion was very low. On the other hand, methanolconversion increased with the palladium content over the Cu-Zr-Pd amorphous alloy, but the selectivity for carbon dioxide was lower than that over Cu-Zr alloy. When the reaction was carried out over catalysts prepared from amorphous Cu-Zr-Au alloy, the methanol conversion increased with the gold content, whereas the carbon dioxide selectivity was almost unity over the range of gold content. The surface area measurement revealed that the dispersion of copper, whichwas effective for the steam reforming reaction, increased with the contentof gold in the amorphous alloy. On the other hand, the dispersion of palladium, which was effective for dehydrogenation of methanol, increased with the palladium content. These results indicate that gold in the Cu-Zr alloy plays an important role in increasing the dispersion of copper. (C) 2001 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/07/20 alle ore 13:32:27