Meso-macroporous Al2O3 supported Ru catalysts for CO preferential oxidation in hydrogen-rich gases

Journal of Natural Gas Chemistry Pub Date : 2012-11-01 DOI:10.1016/S1003-9953(11)60416-7

Limiao Shen, Cheng Zhang, Yuan Liu

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引用次数: 9

Abstract

Series of meso-macroporous Al₂O₃ supported Ru catalysts with different loadings were prepared by incipient wetness method and applied to preferential oxidation of CO in hydrogen-rich gases. N₂ adsorption-desorption, SEM, XRD, TEM, CO chemisorption and H2-TPR techniques were employed to characterize the catalysts. The results indicate that Ru/Al₂O₃ catalysts have meso-macroporous structure, high surface area and high metal dispersion. The characterization results of XRD and CO chemisorption indicate the entry of Ru ions into Al₂O₃ lattice. The results of catalytic performance tests indicate that the meso-macroporous Al₂O₃ supported Ru catalysts for CO preferential oxidation showed good activity under high space velocity. It is proposed that the macropores in the Ru/Al₂O₃ catalyst favor mass transfer and mesopores help to improve the dispersion of metal, resulting in the excellent catalytic performance.

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中-大孔Al2O3负载Ru催化剂在富氢气体中优先氧化CO

采用初湿法制备了一系列不同负载的中大孔Al2O3负载Ru催化剂，并将其应用于富氢气体中CO的优先氧化。采用N2吸附-脱附、SEM、XRD、TEM、CO化学吸附和H2-TPR等技术对催化剂进行了表征。结果表明，Ru/Al2O3催化剂具有介孔结构、高比表面积和高金属分散性。XRD和CO化学吸附表征结果表明Ru离子进入Al2O3晶格。催化性能测试结果表明，介大孔Al2O3负载Ru催化剂在高空速下具有良好的CO优先氧化活性。认为Ru/Al2O3催化剂的大孔有利于传质，介孔有利于金属的分散，从而具有优异的催化性能。

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来源期刊

Journal of Natural Gas Chemistry 化学-工程：化工

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审稿时长

2 months