催化燃烧加热甲醇重整制氢反应器性能研究  

Properties of methanol reforming reactor heated by catalytic combustion for hydrogen production

作　　者：毛祥 李伟钊[1,2] 苑亚 杨鲁伟 MAO Xiang;LI Wei-zhao;YUAN Ya;YANG Lu-wei(Technical Institute of Physics and Chemistry,Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院理化技术研究所,北京100190 [2]中国科学院大学,北京100049

出　　处：《化学工程》2022年第6期61-66,共6页Chemical Engineering(China)

基　　金：山东省科技创新重大资助项目(2019JZZY010405)。

摘　　要：为优化甲醇催化燃烧加热的甲醇水蒸气重整制氢反应器性能,采用数值模拟的方法研究了反应器内耦合化学反应的传热传质过程,分析了进口流量、进料温度和水醇比对温度和反应性能的影响。结果表明:反应器温度分布受到吸放热反应的影响,并且由于热量不平衡而容易产生热点。进料温度对反应器温度影响较小,接近重整通道平均温度可以减小进口处温升。增加水醇比有利于提高甲醇转化率,但造成CO浓度轻微增加。当重整通道进口流量为2.0×10^(-7) kg/s,燃烧通道进口流量为9×10^(-8) kg/s,进料温度为543.15 K,水醇比1.3时,反应器内最大温差达到最小值为15.82 K,重整通道内平均温度为544.34 K,出口H_(2)摩尔分数为0.63,CO摩尔分数为0.0034。In order to improve the properties of methanol steam reforming reactor heated by methanol catalytic combustion,the heat and mass transfer process of coupled chemical reaction in the reactor is studied by numerical simulation.The effects of feed flow rate,feed temperature and water-methanol ratio on the temperature and reaction performance of reactor are analyzed.The results show that the temperature distribution of the self-heating reactor is affected by the endothermic and exothermic reactions,and hot spots are easily generated due to the local heat imbalance.The feed temperature has slight influence on the reactor temperature,and approaching the average temperature of the reforming channel can reduce the temperature rise near the inlet.The increase of water-methanol ratio is beneficial to improve methanol conversion,but it will cause a slight increase in CO concentration.When the mass flow rate of reformer inlet is 2.0×10^(-7) kg/s,the mass flow rate of combustor inlet is 9×10^(-8) kg/s,the feed temperature is 543.15 K and water-methanol ratio is 1.3,the maximum temperature difference of the reactor reaches the minimum value of 15.82 K,the average temperature of the reforming channel is 544.34 K,H_(2) mole fraction of reformate is 0.63 and CO mole fraction of reformate is 0.0034.

关 键 词：甲醇 制氢 水蒸气重整 自热式反应器 数值模拟 

分 类 号：TQ116.2[化学工程—无机化工]