Egg-shell CuO/CeO2/Al2O3 catalysts for CO preferential oxidation

被引：7

作者：

Marino, Fernando ^{[1
]}

Iglesias, Ignacio ^{[1
]}

Baronetti, Graciela ^{[1
]}

Alemany, Luis ^{[2
]}

Laborde, Miguel ^{[1
]}

机构：

[1] Univ Buenos Aires, CONICET, ITHES, Lab Proc Catalit, RA-1428 Buenos Aires, DF, Argentina

[2] Univ Malaga, Fac Ciencias, Dept Ingn Quim, E-29071 Malaga, Spain

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2015年 / 40卷 / 34期

关键词：

COPROX; Hydrogen; Intraparticular profiles; Copper; Cerium; FUEL-CELL SYSTEMS; CARBON-MONOXIDE; SUPPORTED CATALYSTS; HYDROGEN-PRODUCTION; CUO-CEO2; CATALYSTS; EXCESS HYDROGEN; IMPREGNATION; IMPACT; PROX;

D O I：

10.1016/j.ijhydene.2015.03.051

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：

Catalytic systems based on copper and cerium supported on gamma-Al2O3 have shown to be extremely effective for CO preferential oxidation. In order to selectively oxidize carbon monoxide, it is desired that only CO can access to the active sites. Since the effective diffusion of H-2 is higher than that of CO, an egg-shell type distribution is preferred. With the objective of modifying the radial distribution of the active phases in the catalyst particle, the effect of four variables of the impregnation process is analyzed: metal loading, support-solution contact time, impregnation temperature and drying time. Radial profiles of Cu and Ce show that the egg-shell type distribution is favored by low metal loading, short contact and drying times and by high impregnation temperature. The effect of such variables is stronger on copper profile than on cerium profile. Catalytic performance on COPROX was enhanced by egg-shell type distribution. Copyright (C) 2015, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：11235 / 11241

页数：7

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