基于SOFC尾气供热的甲烷重整制氢反应器模拟及实验研究  

Simulation and experimental study on a methane steam reforming reactor heated by SOFC exhausted gas

作　　者：李晓洁 田彭杰 周剑武 夏天 张光学[2] LI Xiaojie;TIAN Pengjie;ZHOU Jianwu;XIA Tian;ZHANG Guangxue(Key Laboratory of Solar Energy Utilization and Energy Saving Technology of Zhejiang Province,Zhejiang Energy Group R&D,Hangzhou 311121,China;Institute of Energy Engineering,China Jiliang University,Hangzhou 310018,China)

机构地区：[1]浙江浙能技术研究院有限公司浙江省太阳能利用及节能技术重点实验室,浙江杭州311121 [2]中国计量大学能源工程研究所,浙江杭州310018

出　　处：《热力发电》2024年第4期28-35,共8页Thermal Power Generation

基　　金：浙江省尖兵计划项目(2023C01124);浙能集团科技项目(ZNKJ-2022-051)。

摘　　要：设计了一种千瓦级新型甲烷重整制氢反应器,采用固态氧化物燃料电池尾气供热,充分利用尾气中的余热和可燃成分,构成紧凑的高效天然气发电系统。采用计算流体力学(CFD)对反应器内燃烧及重整反应进行了数值模拟,结果表明:固态氧化物燃料电池阳极和阴极尾气能够在反应器中稳定燃烧,形成1 486℃高温火焰,为甲烷水蒸气重整反应供热;重整管内水蒸气和甲烷体积分数沿程不断降低,由于水蒸气过量,出口处水蒸气体积分数为35%,出口氢气体积分数为45%,甲烷转化率达到90%左右;镍催化剂具有很高的导热系数,因此重整管内外温差小于15℃;利用实验获得了反应器内温度、甲烷体积分数及甲烷转化率等数据,对比模拟结果验证了数值模拟的准确性。A new kilowatt-class methane reforming hydrogen production reactor is designed,using solid oxide fuel cell exhaust gas for heat supply.The system can make full use of the waste heat and combustible components in the exhaust gas to form a compact and efficient natural gas power generation system.Computational fluid dynamics was used to numerically simulate the combustion and reforming reactions in the reactor.The results show that the solid oxide fuel cell anode and cathode exhaust gases can be stably burned in the reactor to form a high-temperature flame of 1486℃to provide heat for the methane steam reforming reaction.In the reaction tube,the concentrations of H_(2)O and CH_(4) continue to decrease along the way.Due to excess water vapor,the H2O volume concentration at the outlet is 35%,the hydrogen concentration volume fraction is 45%,and the methane conversion rate reaches 90%.Nickel catalyst has a high thermal conductivity,so the temperature difference between the inside and outside of the reaction tube is less than 15℃.At the same time,experimental research was used to obtain data such as temperature,methane concentration and methane conversion rate in the reactor.The simulation results were compared to verify the accuracy of the numerical simulation.

关 键 词：SOFC尾气 甲烷重整 制氢 计算流体力学 

分 类 号：TQ116.2[化学工程—无机化工]