摘要
联合使用可计算表面反应的化学反应动力学软件CHEMKIN4.0和CFD软件,对平板微反应器中Ni催化剂涂层上的甲烷蒸汽重整制合成气进行了数值计算,并结合表面活性组分的分布分析了微通道长度、高度对蒸汽重整性能的影响。计算结果表明:甲烷蒸汽重整受CO(S)的解吸速率控制;反应通道高度减小,从而减少反应物和产物在通道中扩散所需要的时间并增大反应控制组分CO(S)的表面覆盖率,使得甲烷的转化率和产物中的氢含量提高;反应通道长度增大,反应物与催化剂的接触时间延长,甲烷的转化率和氢含量提高。这对进行微通道甲烷蒸汽重整的实验研究以及平板微通道反应器的设计和优化提供了理论依据。
Using software CFD and chemical reaction dynamics software CHEMKIN4.0, a numerical simulation was con- ducted on the methane steam reforming in a plate micro-reactor. Through analyzing the distributing of active elements on the surface, the impact of the length and height of micro-channel on the reaction performance was discussed. Calculation results show that methane steam reforming is constrained by the desorption rate of CO （S）. Smaller height of reaction channel can shorten the time which reactants and products diffuse in the channel and raise the percentage of surface cov- erage of CO （S）, consequently raise the methane conversion rate and hydrogen production; longer length of micro-channel can realize higher methane conversion rate because of longer residence time.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2009年第6期814-819,共6页
Acta Energiae Solaris Sinica
基金
国家自然科学基金(No.50276073)
重庆市自然科学基金(CSTC2006BB6221)
关键词
平板微通道反应器
甲烷蒸汽重整
催化涂层
数值模拟
plate micro-reactor
methane steam reforming
catalytic coating
numerical simulation
