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Ethanol reforming processes over ZnO-supported palladium catalysts: Effect of alloy formation

被引：59
作者：
Casanovas, A
Llorca, J
Homs, N
Fierro, JLG
de la Piscina, PR
机构：
[1] Univ Barcelona, Dept Quim Inorgan, E-08028 Barcelona, Spain
[2] CSIC, Inst Catalisis & Petroleoquim, E-28049 Madrid, Spain
来源：
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 2006年 / 250卷 / 1-2期
关键词：
hydrogen production; ethanol steam reforming; palladium catalyst; PdZn alloy;
D O I：
10.1016/j.molcata.2006.01.033
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
ZnO- and SiO2-supported palladium catalysts were evaluated in the ethanol steam-reforming and oxidative ethanol steam-reforming reactions in the temperature range 548-723 K. The catalysts were characterized before and after reaction by X-ray diffraction, X-ray photoelectron spectroscopy, high-resolution transmission electron microscopy and infrared spectroscopy using CO as a probe molecule. On silica-supported Pd catalyst, ethanol decomposes into H-2, CO and CH4 in both steam-reforming and oxidative steam-reforming reactions. In contrast, ZnO-supported catalysts containing the PdZn phase exhibit a better catalytic performance for hydrogen production through dehydrogenation of ethanol into acetaldehyde and ulterior reforming. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码：44 / 49
页数：6
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