Effect of preparation methods on the catalytic properties of zeolite-supported ruthenium in the Fischer-Tropsch synthesis

Y. W. Chen, H. T. Wang, J. G. Goodwin

研究成果: 雜誌貢獻期刊論文同行評審

97 引文 斯高帕斯(Scopus)

摘要

Three preparation techniques [incipient wetness using a solution of RuCl3, vapor impregnation by Ru3(CO)12, and ion exchange with Ru(NH3)6Cl3] have been used to prepare NaY zeolite-supported ruthenium catalysts. The effect of these preparation methods on the activity and product selectivity of the Ru catalysts in the Fischer-Tropsch synthesis was examined at temperatures in the range of 220-320 °C, a pressure of 1 atm, a CO H2 ratio of 1, and flow rates in the range GHSV = 1800-3600 h-1. It was found that there is a good inverse correlation of turnover numbers for CO conversion to the CO H adsorption ratio, suggesting that the relative availability of adsorbed H2 and CO determines catalyst activity during reaction. Selectivity in the Fischer-Tropsch synthesis was greatly influenced by the preparation method and metal loading. Catalysts prepared by incipient wetness produced mainly methane. Catalysts prepared by vapor impregnation had the best selectivities for higher hydrocarbons and olefins even though they had the smallest average Ru particle sizes. The observed changes in adsorption, activity, and selectivity with preparation method appear to result from differences produced in metal location in/on the zeolite, metal particle size, and zeolite-metal interactions.

原文???core.languages.en_GB???
頁(從 - 到)415-427
頁數13
期刊Journal of Catalysis
83
發行號2
DOIs
出版狀態已出版 - 10月 1983

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