Highly dispersed nickel catalyst promoted by precious metals for CO selective methanation
作者： Woohyun Kim , Kee Young Koo , Heung-ju Lee , Yong-Gun Shul , Wang Lai Yoon
DOI: 10.1016/J.IJHYDENE.2015.06.033
关键词:
摘要: Abstract For CO selective methanation, highly dispersed Ni–MgO/γ–Al 2 O 3 catalysts have been prepared by the deposition-precipitation method. To enhance their low-temperature activity and selectivity to CO, four precious metals (Ru, Rh, Pt Ir) be impregnated onto chosen based on physicochemical properties, e.g. H -spillover CO/CO affinities. Each metal (1 wt. %) has added incipient wetness method catalytic performance tests carried out in a micro fixed-bed reactor. The gas hourly space velocity is 2400/h feed consists of 1 vol. % 20 , 57 15 steam N balance. All characterized BET, XRD, TPR, /CO-chemisorption -TPD so relationships between promotion effects noble addition investigated. experimental data reveals that Ir-doped Ni catalyst shows best (CO concentration
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