摘要
甲醇蒸汽重整(methanol steam reforming,MSR)制氢被认为是最有希望解决氢燃料电池“氢源”问题的方法之一,文章采用计算流体力学(computational fluid dynamics,CFD)的方法,研究管式反应器中反应物入口速度、加热壁温度、水醇摩尔比对反应器内温度分布及出口产物的影响。研究结果表明:在反应物入口温度为493 K、水醇摩尔比为1.3的工况下,当反应物入口速度由0.02 m/s增加至0.10 m/s时,反应器内部“冷点”区域逐渐扩大,反应器出口甲醇摩尔分数先不变后增加;当加热壁温度由513 K增加至593 K时,反应器内部“冷点”区域逐渐减小,反应器出口甲醇摩尔分数降低了93.50%;随着反应物水醇摩尔比从0.7增加至1.5,反应器出口氢气摩尔分数降低了9.90%,CO摩尔分数降低了76.55%。该研究结果可为管式甲醇蒸汽重整制氢反应器的运行提供一定的参考。
Methanol steam reforming(MSR)for hydrogen production is one of the most promising methods to solve the“hydrogen source”problem of hydrogen fuel cells.In this paper,computational fluid dynamics(CFD)method was used to numerically study the effects of reactant inlet velocity,heating wall temperature,and steam-to-methanol molar ratio in the tubular reactor on the internal temperature distribution and the outlet products of the reactor.The results show that under the operating conditions of an inlet temperature of the reactant of 493 K and a steam-to-methanol molar ratio of 1.3,the“cold point”area inside the reactor is gradually expanded and the mole fraction of methanol at the reactor outlet remains unchanged and then increases when the inlet velocity of the reactant increases from 0.02 m/s to 0.10 m/s.When the temperature of the heating wall increases from 513 K to 593 K,the“cold point”area inside the reactor gradually decreases and the mole fraction of methanol at the reactor outlet is reduced by 93.50%.As the steam-to-methanol molar ratio increases from 0.7 to 1.5,the mole fraction of hydrogen at the reactor outlet is reduced by 9.90%,and the mole fraction of CO is reduced by 76.55%.The research conclusions can provide reference for the operation of tubular MSR reactors for hydrogen production.
作者
唐景春
王登峰
孙东方
周培
TANG Jingchun;WANG Dengfeng;SUN Dongfang;ZHOU Pei(School of Automobile and Traffic Engineering,Hefei University of Technology,Hefei 230009,China)
出处
《合肥工业大学学报(自然科学版)》
北大核心
2025年第7期884-888,共5页
Journal of Hefei University of Technology:Natural Science
基金
国家自然科学基金资助项目(52006051)。
关键词
甲醇蒸汽重整(MSR)
数值模拟
传热
温度分布
工况分析
methanol steam reforming(MSR)
numerical simulation
heat transfer
temperature distribution
operating condition analysis
