Production of sustainable methane from renewable energy and captured carbon dioxide with the use of Solid Oxide Electrolyzer: A thermodynamic assessment

被引:52
|
作者
Stempien, Jan Pawel [1 ,2 ,3 ]
Ni, Meng [4 ]
Sun, Qiang [3 ,5 ]
Chan, Siew Hwa [1 ,2 ,3 ]
机构
[1] Nanyang Technol Univ, Sch Mech & Aerosp Engn, Singapore 639798, Singapore
[2] Nanyang Technol Univ, Energy Res Inst NTU ERI N, Singapore 637141, Singapore
[3] Ctr Res Excellence & Technol Enterprise, Singapore Peking Univ Res Ctr, Singapore 138602, Singapore
[4] Hong Kong Polytech Univ, Dept Bldg & Real Estate, Bldg Energy Res Grp, Kowloon, Hong Kong, Peoples R China
[5] Peking Univ, Coll Engn, Dept Adv Mat & Nanotechnol, Beijing 100871, Peoples R China
基金
新加坡国家研究基金会;
关键词
Solid Oxide Electrolyzer; Synthetic fuel; Methane; Renewable fuel; Modelling; Sustainable system analysis; Synthetic natural gas (SNG); CO-ELECTROLYSIS; HYDROGEN-PRODUCTION; HYDROCARBON FUELS; HIGH-TEMPERATURE; SYNTHETIC FUELS; CELL SOEC; STEAM; PERFORMANCE; KINETICS; SYSTEM;
D O I
10.1016/j.energy.2015.01.081
中图分类号
O414.1 [热力学];
学科分类号
摘要
A possible pathway for renewable and sustainable methane production from captured carbon dioxide, water (or seawater) and renewable electricity is proposed and analysed. The proposed system includes Solid Oxide Electrolyzer Cell combined with ex-situ methane synthesis reactor comprising Sabatier, Methanation and Water-Gas Shift reactions. A well validated electrochemical model is used to describe the behaviour of the electrolyzer for steam/carbon dioxide co-electrolysis. The methane synthesis reactor is modelled by a set of equations based on thermodynamic equilibrium reaction constants. Effects of current density, temperature, pressure and initial steam to carbon dioxide ratio on system performance are analysed and their effects are discussed. It is found that a simple, single-pass system without heat recuperation could achieve a maximum overall energy efficiency of 60.87% (based on lower heating value), a maximum electrical energy efficiency of 81.08% (based on lower heating value), and a maximum amount of methane production of similar to 1.52 Nm(3) h(-1) m(-2) of electrolyzer. It is also found that conversion of similar to 100% captured carbon dioxide is possible in the proposed system. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码:714 / 721
页数:8
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