摘要
为了强化微通道中甲醇水蒸汽重整制氢,考察了催化表面布置对该反应过程的影响。利用计算流体力学软件FLUENT中的通用有限速率模型对甲醇水蒸汽重整过程进行了二维数值研究。计算表明,在相同的反应条件下,通过对微通道中催化表面的间断分布可以提高反应通道出口甲醇的转化率,且随进口温度和速度的增加这一效果更加明显。在进口温度为513K、进口速度为1.0m/s下转化率提高达10.2%。虽然催化表面的间断分布使通道内温度分布变得不均匀,但并不影响甲醇转化率的提高。对微通道内采用涂层催化剂的非均相催化反应过程而言,间断分布可以提高催化表面利用率,节约催化剂的用量。
In order to intensify the process of methanol steam reforming, the effect of catalytic surface distribution on this reaction was investigated. With the application of general finite reaction rate model in CFD software of FLUENT, 2-D simulation of this process was carried out. Results show that, in the same conditions, through interrupted distribution of catalytic surface, methanol conversion is improved. With the increase of inlet temperature and velocity, the conversion increase elevates. At the condition of 513 K, 1 m/s, this increase reaches 10.2%, although the temperature in reaction channel becomes uneven. So in microreators that utilize coating catalyst, this interrupted distribution of surface can improve the efficiency of catalyst and thus reduce the cost of catalyst.
出处
《电源技术》
CAS
CSCD
北大核心
2008年第1期35-38,62,共5页
Chinese Journal of Power Sources
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(2006BB6221)
关键词
甲醇水蒸汽重整
催化涂层
表面分布
methanol steam reforming
catalytic coating layer
surface distribution
