催化作用
甲烷化
材料科学
氧化物
介孔材料
化学工程
氢
蒸发
比表面积
大气温度范围
化学
冶金
有机化学
物理
工程类
气象学
热力学
作者
Chaoxian Wang,Dan Ping,Xinfa Dong,Yingchao Dong,Yunhao Zang
标识
DOI:10.1016/j.fuproc.2016.03.021
摘要
An evaporation-induced self-assembly method was employed for the first time to prepare Ni-Al-oxide/Ni-foam composites as support for a novel Ru/Ni-Al-oxide/Ni-foam 3D composite catalyst, which was utilized to effectively deep-remove CO in hydrogen-rich gas for fuel cell applications. The characterizations of BET, XRD, SEM and TEM show that a mesoporous Ni-Al oxide was constructed on Ni foam via this feasible way with specific surface area as high as 42 m2 g− 1, which assured a uniform dispersion of Ru nano-particles. The resultant monolithic catalysts exhibit an excellent performance for CO selective methanation, which may be attributed to its unique high specific surface area for more active sites and high thermal conductivity for avoiding the formation of local hot spots. The CO outlet concentration in hydrogen-rich gas can be decreased down to as low as less than 10 ppm from a high level of 1 vol% in a wide working temperature range of 180–280 °C, while the CH4 outlet concentration is less than 2 vol%.
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