发电技术 ›› 2024, Vol. 45 ›› Issue (2): 331-340.DOI: 10.12096/j.2096-4528.pgt.22168

• 新能源 • 上一篇    下一篇

基于三元催化剂的固体氧化物燃料电池尾气催化燃烧数值模拟

龚思琦1, 云再鹏2, 许明1, 敖乐2, 李初福1, 黄凯2, 孙晨2   

  1. 1.北京低碳清洁能源研究院,北京市 昌平区  102209
    2.国家能源集团国华巴彦淖尔 (乌拉特中旗)风电有限公司,内蒙古自治区 巴彦淖尔市  015000
  • 收稿日期:2023-01-06 出版日期:2024-04-30 发布日期:2024-04-29
  • 通讯作者: 许明
  • 作者简介:龚思琦(1995),女,硕士,工程师,研究方向为IGFC/SOFC系统,siqi.gong@chnenergy.com.cn
    许明(1979),男,博士,高级工程师,研究方向为反应器开发和燃料电池,本文通信作者,ming.xu.n@chnenergy.com.cn
  • 基金资助:
    国家重点研发计划项目(2017YFB0601900)

Numerical Simulation of Solid Oxide Fuel Cell Tail Gas Catalytic Combustion Based on Three-Way Catalyst

Siqi GONG1, Zaipeng YUN2, Ming XU1, Le AO2, Chufu LI1, Kai HUANG2, Chen SUN2   

  1. 1.National Institute of Clean-and-Low-Carbon Energy, Changping District, Beijing 102209, China
    2.CHN Energy Guohua Bayannur (Ullatzhongqi) Wind Power Co. , Ltd. , Bayannur 015000, Inner Mongolia Autonomous Region, China
  • Received:2023-01-06 Published:2024-04-30 Online:2024-04-29
  • Contact: Ming XU
  • Supported by:
    National Key Research and Development Program of China(2017YFB0601900)

摘要:

固体氧化物燃料电池(solid oxide fuel cell,SOFC)作为一种清洁高效的先进发电设备,具有空气、燃料气分离的结构优势,易于将燃料侧尾气中的CO2富集。为提高SOFC阳极尾气中CO2浓度,针对商业化的三元催化剂,综合考虑SOFC阳极尾气催化燃烧中传质、传热、化学反应过程,建立多物理场耦合稳态模型。基于该模型,模拟SOFC系统阳极尾气的催化燃烧特性,研究不同入口温度、反应空速和催化剂尺寸对燃烧温度、壁面温度、H2转化率、CO转化率、出口CO2浓度等参数的影响,得到各参数的变化趋势。借鉴已有实验,通过优化空速,可以将出口CO2浓度从94.72%提高至95.33%;通过优化催化剂尺寸,可以将出口CO2体积分数从94.72%提高至95.64%。通过分析尾气催化燃烧中不同工况下的出口CO2浓度变化特性,为商业三元催化剂用于SOFC系统阳极尾气催化转化和尾气CO2富集提供指导。

关键词: 碳排放, 碳捕集, 三元催化剂, 固体氧化物燃料电池(SOFC), 数值模拟

Abstract:

As a clean and efficient advanced power generation equipment, the solid oxide fuel cell (SOFC) has the structural advantages of separation of air and fuel gas, which makes it easy to enrich the CO2 in the tail gas of the fuel side. In order to improve the CO2 concentration in SOFC anode tail gas, a steady-state multi-physical coupled model was established for the commercial three-way catalysts, considering the mass transfer, heat transfer, and chemical reaction processes in the catalytic combustion of SOFC anode tail gas. Based on this model, the catalytic combustion characteristics of SOFC anode tail gas were simulated. The effects of different inlet temperature, reaction space velocities and catalyst sizes on combustion temperature, wall temperature, H2 conversion, CO conversion and outlet CO2 concentration were studied, and the change trend of each parameter was obtained. Based on the existing experiments, the outlet CO2 volume fraction could be increased from 94.72% to 95.33% by optimizing the space velocity, and the outlet CO2 concentration could be increased from 94.72% to 95.64% by optimizing the catalyst size. By analyzing the variation characteristics of outlet CO2 concentration under different working conditions in the catalytic combustion of tail gas, the guidance for the commercial three-way catalyst to be used in the catalytic conversion of anode tail gas and CO2 enrichment in the tail gas of SOFC system was provided.

Key words: carbon emission, carbon capture, three-way catalyst, solid oxide fuel cell (SOFC), numerical simulation

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