The Effects of Morphology on the Oxidation of Ceria by Water and Carbon Dioxide

被引：85

作者：

Venstrom, Luke J. ^{[2
]}

Petkovich, Nicholas ^{[1
]}

Rudisill, Stephen ^{[1
]}

Stein, Andreas ^{[1
]}

Davidson, Jane H. ^{[2
]}

机构：

[1] Univ Minnesota Twin Cities, Dept Chem, Minneapolis, MN 55455 USA

[2] Univ Minnesota Twin Cities, Dept Mech Engn, Minneapolis, MN 55455 USA

来源：

JOURNAL OF SOLAR ENERGY ENGINEERING-TRANSACTIONS OF THE ASME | 2012年 / 134卷 / 01期

基金：

美国国家科学基金会;

关键词：

cerium compounds; hydrogen production; mesoporous materials; oxidation; sintering; HYDROGEN-PRODUCTION; SOLAR; CYCLES; H2O; CO2;

D O I：

10.1115/1.4005119

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

The oxidation of three-dimensionally ordered macroporous (3DOM) CeO2 (ceria) by H2O and CO2 at 1100 K is presented in comparison to the oxidation of nonordered mesoporous and sintered, low porosity ceria. 3DOM ceria, which features interconnected and ordered pores, increases the maximum H-2 and CO production rates over the low porosity ceria by 125% and 260%, respectively, and increases the maximum H-2 and CO production rates over the nonordered mesoporous cerium oxide by 75% and 175%, respectively. The increase in the kinetics of H2O and CO2 splitting with 3DOM ceria is attributed to its enhanced specific surface area and to its interconnected pore system that facilitates the transport of reacting species to and from oxidation sites. [DOI: 10.1115/1.4005119]

引用

页数：8

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