Qualitative investigation on effects of manifold shape on methanol steam reforming for hydrogen production
Qualitative investigation on effects of manifold shape on methanol steam reforming for hydrogen production
复制标题
歧管形状对甲醇水蒸气重整制氢影响的定性研究
DOI：
10.1016/j.renene.2011.08.027
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发表时间：
2012-03
期刊：
影响因子：
8.7
通讯作者：
Yong Tang
中科院分区：
文献类型：
--
作者：
Dehuai Zeng;Minqiang Pan;Yong Tang
微通道内流体速度分布对反应性能有重要影响。采用三维CFD模型，分别在无反应和甲醇水蒸气重整两种情况下，比较了两种不同歧管结构的微通道间的速度分布。然后对两种板内甲醇水蒸气重整性能进行了实验研究，并结合速度分布模拟结果定性分析了歧管形状对制氢性能的影响。结果表明，直角歧管微通道板在不同入口速度和反应温度下，无论是无反应还是甲醇水蒸气重整，均能获得较窄的速度分布，这是导致转化率和选择性优于直角歧管微通道板的关键因素。优化结构参数，以促进一个相对均匀的速度分布，以提高制氢性能可能是一个关键因素要考虑。
Fluid velocity distribution among microchannels plays important role on the reaction performances. In this work, the velocity distribution among microchannels with two different manifold structures is compared by a three-dimensional CFD model under two situations respectively, no reaction and methanol steam reforming occurs. Then the performances of methanol steam reforming in both plates are experimentally investigated, and the effect of manifold shape on the hydrogen production performances is qualitatively analyzed by the combination of simulation results of velocity distribution. It is found that the microchannel plate with right-angle manifold enables narrow velocity distributions under different entrance velocities and reaction temperatures, whether no reaction occurs or methanol steam reforming is progressing, which can be the critical element results in better conversion rate and selectivity of process than that of the microchannel plate with oblique-angle manifold. Optimizing the structural parameters to facilitate a relatively uniform velocity distribution to increase the hydrogen production performances may be a key factor to be considered.
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