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本文利用一种新的方法-溶剂化金属原子浸渍法制备了Fe/γ-Al_2O_3,Fe/SiO_2,Co/γ-Al_2O_3,Co/SiO_2,Ni/γ-Al_2O_3和Ni/SiO_2六种催化剂。H_2化学吸附,TEM和XRD测定结果表明这些催化剂中Fe,Co,Ni金属颗粒平均直径都小于30A,金属分散度均大于50%。作者研究了Fe/γ-Al_2O_3,Co/γ-Al_2O_3和Ni/γ-Al_2O_3三种催化剂在CO+H_2反应中的催化行为,测定了碳氢产物分布和比催化活性,表明随着H_2/CO比增大和反应温度升高。较高分子量物种产量减少,有利于生成甲烷。催化剂的活性大小次序为Fe>Ni>Co。
In this paper, six new catalysts, Fe / γ-Al_2O_3, Fe / SiO_2, Co / γ-Al_2O_3, Co / SiO_2, Ni / γ-Al_2O_3 and Ni / SiO_2 were prepared by solvothermal metal atom impregnation. The results of H 2 chemisorption, TEM and XRD showed that the average diameters of Fe, Co and Ni metal particles in these catalysts were all less than 30A, and the metal dispersions were all above 50%. The authors investigated the catalytic behavior of the three catalysts Fe / γ-Al_2O_3, Co / γ-Al_2O_3 and Ni / γ-Al_2O_3 in the CO + H_2 reaction and determined the distribution of hydrocarbons and the specific catalytic activity. Than the increase and the reaction temperature. Production of higher molecular weight species is reduced, favoring methane production. The order of the activity of the catalyst is Fe> Ni> Co.