发电技术 ›› 2024, Vol. 45 ›› Issue (2): 331-340.DOI: 10.12096/j.2096-4528.pgt.22168
龚思琦1, 云再鹏2, 许明1, 敖乐2, 李初福1, 黄凯2, 孙晨2
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:
基金资助:
Siqi GONG1, Zaipeng YUN2, Ming XU1, Le AO2, Chufu LI1, Kai HUANG2, Chen SUN2
Received:
2023-01-06
Published:
2024-04-30
Online:
2024-04-29
Contact:
Ming XU
Supported by:
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。
中图分类号:
龚思琦, 云再鹏, 许明, 敖乐, 李初福, 黄凯, 孙晨. 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[J]. 发电技术, 2024, 45(2): 331-340.
Siqi GONG, Zaipeng YUN, Ming XU, Le AO, Chufu LI, Kai HUANG, Chen SUN. Numerical Simulation of Solid Oxide Fuel Cell Tail Gas Catalytic Combustion Based on Three-Way Catalyst[J]. Power Generation Technology, 2024, 45(2): 331-340.
组分 | CO | H2 | N2 | CO2 | O2 | H2O |
---|---|---|---|---|---|---|
摩尔分数/% | 4.8 | 8.0 | 1.0 | 29.9 | 6.4 | 49.9 |
表1 入口组分参数
Tab. 1 Inlet component parameters
组分 | CO | H2 | N2 | CO2 | O2 | H2O |
---|---|---|---|---|---|---|
摩尔分数/% | 4.8 | 8.0 | 1.0 | 29.9 | 6.4 | 49.9 |
参数 | 数值 |
---|---|
催化剂孔隙率 | 0.61 |
催化剂渗透率 | 10-6 |
发射率 | 0.75 |
外界温度 | 293.15 |
H2转化活化能 | 6.225×104 |
H2转化指前因子 | 8.193×105 |
CO转化活化能 | 8.784×104 |
CO转化指前因子 | 7.46×106 |
表2 物性参数
Tab. 2 Physical parameters
参数 | 数值 |
---|---|
催化剂孔隙率 | 0.61 |
催化剂渗透率 | 10-6 |
发射率 | 0.75 |
外界温度 | 293.15 |
H2转化活化能 | 6.225×104 |
H2转化指前因子 | 8.193×105 |
CO转化活化能 | 8.784×104 |
CO转化指前因子 | 7.46×106 |
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