Aqueous-phase reforming of ethylene glycol on silica-supported metal catalysts

被引：435

作者：

Davda, RR ^{[1
]}

Shabaker, JW ^{[1
]}

Huber, GW ^{[1
]}

Cortright, RD ^{[1
]}

Dumesic, JA ^{[1
]}

机构：

[1] Univ Wisconsin, Dept Chem Engn, Madison, WI 53706 USA

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2003年 / 43卷 / 01期

关键词：

ethylene glycol; hydrogen production; supported metal catalysts; renewable energy; fuel cells;

D O I：

10.1016/S0926-3373(02)00277-1

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：

Reaction kinetic studies were conducted for aqueous-phase reforming of ethylene glycol over silica-supported Ni, Pd, Pt, Ru, Rh and Ir catalysts at temperatures of 483 and 498 K and at a total pressure of 22 bar. The rates of production of hydrogen, carbon dioxide, carbon monoxide, methane, ethane and higher paraffins were measured for conversion of an aqueous feed solution containing 10wt.% ethylene glycol. It was observed that the overall catalytic activity for ethylene glycol reforming, as measured by the rate Of CO2 production at 483 K, decreases in the following order for silica-supported metals: Pt similar to Ni > Ru > Rh similar to Pd > Ir. Silica supported Rh, Ru and Ni showed a low selectivity for production of H-2 and a high selectivity for alkane production. In addition, Ni/SiO2 showed significant deactivation at the higher temperature of 498 K. Silica-supported Pt and Pd catalysts exhibited relatively high selectivities for production of H-2, with low rates of alkane production. It appears that catalysts based on Pt and Pd may be promising materials for the selective production of hydrogen by aqueous-phase reforming of oxygenated hydrocarbons, such as ethylene glycol. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：13 / 26

页数：14

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