2D thermal modeling of a solid oxide electrolyzer cell (SOEC) for syngas production by H2O/CO2 co-electrolysis

被引：158
|
作者：
Ni, Meng [1 ]
机构：
[1] Hong Kong Polytech Univ, Dept Bldg & Real Estate, Bldg Energy Res Grp, Kowloon, Hong Kong, Peoples R China
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2012年 / 37卷 / 08期
关键词：
Solid oxide fuel cell; Heat transfer; Synthetic fuel; Co-electrolysis; Thermo-electrochemical model; HIGH-TEMPERATURE COELECTROLYSIS; CARBON-DIOXIDE ELECTROLYSIS; HYDROGEN-PRODUCTION; STEAM ELECTROLYZER; ELECTRODE/ELECTROLYTE INTERFACE; TRANSPORT PHENOMENA; DUCTS RELEVANT; FUEL-CELLS; GAS; ENERGY;
D O I：
10.1016/j.ijhydene.2012.01.072
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：
Solid oxide fuel cells (SOFCs) can be operated in a reversed mode as electrolyzer cells for electrolysis of H2O and CO2. In this paper, a 2D thermal model is developed to study the heat/mass transfer and chemical/electrochemical reactions in a solid oxide electrolyzer cell (SOEC) for H2O/CO2 co-electrolysis. The model is based on 3 sub-models: a computational fluid dynamics (CFD) model describing the fluid flow and heat/mass transfer; an electrochemical model relating the current density and operating potential; and a chemical model describing the reversible water gas shift reaction (WGSR) and reversible methanation reaction. It is found that reversible methanation and reforming reactions are not favored in H2O/CO2 co-electrolysis. For comparison, the reversible WGSR can significantly influence the co-electrolysis behavior. The effects of inlet temperature and inlet gas composition on H2O/CO2 co-electrolysis are simulated and discussed. Copyright (C) 2012, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：6389 / 6399
页数：11
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