Paper-structured catalyst with porous fiber-network microstructure for autothermal hydrogen production
Paper-structured catalyst with porous fiber-network microstructure for autothermal hydrogen production
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DOI：
10.1016/j.cej.2007.11.042
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发表时间：
2008-06
影响因子：
15.1
通讯作者：
Hirotaka Koga;S. Fukahori;T. Kitaoka;Mitsuyoshi Nakamura;H. Wariishi
中科院分区：
文献类型：
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作者：
Hirotaka Koga;S. Fukahori;T. Kitaoka;Mitsuyoshi Nakamura;H. Wariishi
采用造纸法将铜锌氧化物催化剂粉末负载在由陶瓷纤维网络组成的微结构基质上。将所制备的纸结构催化剂应用于甲醇的自热重整反应(ATR)，以制备燃料电池用氢气。与商用催化剂相比，纸型催化剂表现出较高的甲醇转化率和较低的一氧化碳浓度。此外，ATR反应过程中铜的烧结会受到抑制，表现出良好的催化剂耐久性。即使在使用烧结型催化剂的情况下，纸型催化剂在甲醇转化中也表现出了显着的优势。这些特征可能是由于纸复合材料独特的纤维网络结构(平均孔径为约20μm，孔隙率为约50%)所致，这可能允许热和反应物有效地传递到催化剂表面。多孔纸结构催化剂有望成为改善催化重整过程中实际性能的一种有前途的催化材料。
Copper–zinc oxide catalyst powders were supported on a microstructured matrix composed of ceramic fiber-network by a papermaking technique. As-prepared catalyst materials, called paper-structured catalyst, were applied to the autothermal reforming (ATR) of methanol to produce hydrogen for fuel cell applications. The paper-structured catalyst demonstrated higher methanol conversion and lower undesirable carbon monoxide concentration, as compared with commercial catalysts. Besides, excellent catalyst durability was exhibited by the suppression of Cu sintering during the ATR reaction. The paper-structured catalyst showed remarkable superiority in methanol conversion even in the case of using sintered catalysts. Such features were possibly induced by the unique fiber-network microstructure (average pore size: ca. 20μm and porosity: ca. 50%) of the paper composites, which may allow the effective transfer of heat and reactants to the catalyst surfaces. The porous paper-structured catalyst is expected as a promising catalytic material for improving the practical performances in the catalytic gas-reforming process.