反应机理分布对甲醇蒸汽重整制氢过程的影响  

Effect of reaction mechanism distribution on methanol steam reforming for hydrogen production

作　　者：王锋[1] 崔文智[1] 李隆键[1] 辛明道[1] 陈清华[1] 

机构地区：[1]重庆大学动力工程学院,重庆400044

出　　处：《热科学与技术》2007年第2期172-177,共6页Journal of Thermal Science and Technology

基　　金：国家自然科学基金资助项目(50276073);重庆市自然科学基金资助项目(CSTC.2006BB6221)

摘　　要：为强化微通道中甲醇蒸汽重整过程,考察了反应机理分布对制氢的影响。利用计算流体力学软件FLUENT中的通用有限速率模型对该过程进行了数值研究。计算表明,在相同反应条件下,采用贵金属催化剂所对应的反应机理的甲醇转化率较高,但其成本相应高。通过对催化表面上催化剂的分段布置,可以提高甲醇转化率,且在低温和高进口速度时更有效。在铜基和贵金属催化剂用量相等和温度453 K、进口速度0.4 m.-s1时甲醇转化率提高2.7%。In order to intensify the process of methanol steam reforming in microchannel, the effect of mechanism distribution to this reaction was investigated. With the application of general finite rate model in CFD software of FLUENT, a 2-D simulation of this process was carried out. The results show that, at same conditions, the methanol conversion is higher with the mechanism on Pd/ZnO catalysis, but the cost of catalysis will increase. Through the interrupted distribution of mechanism, the conversion can be improved, and this increase is especially good for low temperature and high inlet velocity. At same copper and Pd based catalyst load and inlet temperature 453 K, 0. 4 m·s^-1 theincrease of conversion reaches 2.7%.

关 键 词：甲醇蒸汽重整 催化涂层 反应机理分布 过程强化 

分 类 号：TK16[动力工程及工程热物理—热能工程]