【摘要】 用非传统方法制备了Ｒｈ２Ｃｏ２／Ａｌ２Ｏ３、Ｃｏ２／Ａｌ２Ｏ３、Ｒｈ４／Ａｌ２Ｏ３和用传统方法制备了（Ｒｈ＋Ｃｏ）／Ａｌ２Ｏ３催化剂。用连续流动微反装置研究了上述催化剂的ＣＯ加氢活性及选择性，并系统地研究了Ｈ２／ＣＯ比值和温度对反应活性及选择性的影响。结果表明，Ｒｈ２Ｃｏ２／Ａｌ２Ｏ３的活性不仅高于Ｒｈ４／Ａｌ２Ｏ３和Ｃｏ２／Ａｌ２Ｏ３，而且也高于（Ｒｈ＋Ｃｏ）／Ａｌ２Ｏ３，在选择性方面与上述样品也有明显差异。当Ｈ２／ＣＯ比值从６：１变到１：１时，其它催化剂的反应活性大为降低，而Ｒｈ２Ｃｏ２／Ａｌ２Ｏ３仍保持高活性。更多还原

【Abstract】 Rh2Co2/Al2O3, Co2/Al2O3, and Rh4/Al2O3catalysts were prepared by non-traditionalmethods ,and (Rh+Co ) /Al2O3 by a traditionalone.The activities and selectivities of thesecatalysts for CO hydrogenation were tested ina continuous flow micro-reactor, and the effects of H2/CO ratio and temperatures on activity and selectivity for the reaction were alsoinvestigated. The results show that the activity of Rh2Co2/Al2O3 catalyst is higher not onlythan Rh4/Al2O3 and Co2/Al2O3, but also than(Rh+Co)/Al2O3, and the former is obviouslydifferent from the others in selectivity.Whenthe H2:CO ratio changes from 6: 1 to l: 1,Rh2Co2/Al2O3 retains its high activity whilethose of thd other catalysts decrease significantly.更多还原