Steam reforming behavior of methanol using paper-structured catalysts: Experimental and computational fluid dynamic analysis
Steam reforming behavior of methanol using paper-structured catalysts: Experimental and computational fluid dynamic analysis
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DOI：
10.1016/j.ijhydene.2007.12.063
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发表时间：
2008-03
影响因子：
7.2
通讯作者：
S. Fukahori;Hirotaka Koga;T. Kitaoka;Mitsuyoshi Nakamura;H. Wariishi
中科院分区：
文献类型：
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作者：
S. Fukahori;Hirotaka Koga;T. Kitaoka;Mitsuyoshi Nakamura;H. Wariishi
采用造纸法将铜锌氧化物催化剂粉末浸渍到纸结构复合材料(催化纸)中。采用甲醇水蒸气重整(MSR)工艺制备了纸型催化剂，并与颗粒型和粉末型催化剂进行了比较，结果表明，纸型催化剂具有良好的催化性能。与催化剂颗粒相比，催化剂纸表现出相对稳定的气流。在此基础上，利用计算流体动力学(CFD)对MSR过程进行了数值模拟，考察了催化层的导热性能对MSR过程的影响。较高的导热系数有助于较高的甲醇转化率和较低的一氧化碳浓度；热量和氢、二氧化碳等化学物种的局部化程度提高，从而抑制了逆水煤气变换反应。将CFD分析应用到催化层的设计中，提出了合适的形状，在不降低甲醇转化率的情况下，进一步抑制了一氧化碳的生成。
Copper–zinc oxide (Cu/ZnO) catalyst powders were impregnated into paper-structured composites (catalyst paper) using a papermaking process. The paper-structured catalyst was subjected to the methanol steam reforming (MSR) process and exhibited excellent performance compared with those achieved by pellet-type or powdered catalyst. The catalyst paper demonstrated a relatively stable gas flow as compared to catalyst pellets. Furthermore, the MSR process was simulated by computational fluid dynamic (CFD) analysis, and the heat conductivity influence of the catalyst layer was investigated. Higher heat conductivity contributed to both higher methanol conversion and lower carbon monoxide concentration; localization of heat and chemical species such as hydrogen and carbon dioxide were improved, resulting in suppression of reverse water–gas shift reaction. The CFD analysis was applied to the design of a catalyst layer in which a suitable shape was suggested, where carbon monoxide formation was further suppressed without a decrease in the methanol conversion.