Oxygen transport through LSM/YSZ/LaAlO system for use of fuel cell type reactor

被引:26
作者
Kiatkittipong, W
Tagawa, T [1 ]
Goto, S
Assabumrungrat, S
Praserthdam, P
机构
[1] Nagoya Univ, Dept Chem Engn, Nagoya, Aichi 4648603, Japan
[2] Chulalongkorn Univ, Dept Chem Engn, Ctr Excellence Catalysis & Catalyt React Engn, Bangkok 10330, Thailand
关键词
solid oxide fuel cell; SOFC reactor; oxygen permeation; modeling; methane;
D O I
10.1016/j.cej.2004.11.004
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Oxygen transport in an LSM/YSZ/LaAlO solid oxide fuel cell type reactor was studied. The oxygen permeation flux was 8.90 x 10(-8) mol m(-2) s(-1) at 1173K with an activation energy of 170 kJmol(-1). By applying an external potential, the oxygen permeation flux increased while the activation energy of oxygen permeation decreased. The oxygen permeation fluxes under methane feed in the anode side are 1-2 orders of magnitude higher than those under helium feed. A model of oxygen permeation was presented and the permeation parameters were proposed. In the case of helium feed, the oxygen permeation at the LaAlO anode was the rate-limiting step. However, changing helium to methane as a reactive gas, the resistances for the oxygen permeation in the three parts (LSM/YSZ/LaAlO) were comparable. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码:35 / 42
页数:8
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