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仿蜂巢微通道分叉结构的甲醇重整制氢

发表时间:2011-08-31  浏览量:1263  下载量:554
全部作者: 沈寅麒,杜小泽,杨立军
作者单位: 华北电力大学能源动力与机械工程学院
摘 要: 针对甲醇蒸汽的微通道重整催化反应过程,建立三维稳态多组分传输反应模型,利用数值模拟分析,分别研究平行阵列微通道和仿蜂巢分叉微通道在Zn_Cr/CeO2/ZrO2催化剂下的反应情况。通过双速率模型考察这2种流道中操作条件对甲醇水蒸汽重整制氢输运规律的影响,发现这2种微通道反应器促进了甲醇转化率和H2产率的提高;同时相较常规平行微通道,仿蜂巢分叉微通道所需的泵功较小,在相同的加热面积下吸收的热量更大,且更有利于反应器内温度的均匀分布,从而提高甲醇的转化率、减小出口CO的含量,是一种理想的适用于质子交换膜燃料电池(proton exchange membrane fuel cell,PEMFC)的制氢流道。
关 键 词: 工程热物理;微通道;甲醇重整;质子交换膜燃料电池
Title: Hydrogen production by steam reforming of methanol in a reactor with comby fractal micro-channel network
Author: SHEN Yinqi, DU Xiaoze, YANG Lijun
Organization: School of Energy, Power and Mechanical Engineering, North China Electric Power University
Abstract: According to the catalytic reaction of methanol steam reforming in a micro-channel reactor, a steady-state multi-component transport reaction model in the form of three-dimension was established. By numerical simulations, the reactions in rectangular parallel micro-channels and in comby fractal micro-channel network with catalyst Zn_Cr/CeO2/ZrO2 were studied. Based on the dual-rate model, the effect of the operating condition on the transport law of methanol steam reforming in these micro-channels was investigated, which reflected that these two micro-channels were conducive to the increase of the methanol conversion and the hydrogen production. Meanwhile, compared to the rectangular parallel micro-channels, comby fractal micro-channel network possesses several advantages. For example, its required pump power is much smaller. And under the same heating area, it is able to absorb more heat. Also, comby fractal micro-channel is more conducive to the uniformity of temperature distribution, in turn enhancing methanol conversion and reducing CO. Therefore, it is an ideal channel for hydrogen production in proton exchange membrane fuel cell (PEMFC).
Key words: engineering thermophysics; micro-channel; methanol reforming; proton exchange membrane fuel cell
发表期数: 2011年8月第16期
引用格式: 沈寅麒,杜小泽,杨立军. 仿蜂巢微通道分叉结构的甲醇重整制氢[J]. 中国科技论文在线精品论文,2011,4(16):1515-1524.
 
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