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系统考察了稀土氧化物La2 O3 ,Nd2 O3 ,Sm2 O3 ,Dy2 O3 ,Sc2 O3 和CeO2 作为助催化剂对Fe1-xO基催化剂性能的影响 .结果表明 ,稀土氧化物与Fe1-xO作用生成了一种作为隔离体的复合氧化物REFeO3 ,从而促进了催化剂的还原 ,这种促进作用随稀土离子半径不同呈规律性变化 .添加不同稀土氧化物的Fe1-xO催化剂的还原都存在补偿效应 ,各系列催化剂还原反应的转效温度与所添加稀土元素的离子半径呈正比关系 (CeO2 除外 ) .稀土氧化物可以有效地提高催化剂的低温活性 ,其添加量的变化对催化剂活性的促进作用规律与对催化剂还原性能的促进作用规律一致 .
The effect of rare earth oxides La2 O3, Nd2 O3, Sm2 O3, Dy2 O3, Sc2 O3 and CeO2 as promoters on the performance of Fe1-xO catalysts was systematically investigated. The results showed that the rare earth oxides reacted with Fe1-xO to form a As the composite oxide REFeO3, thus promoting the reduction of the catalyst, the promotion with the radius of rare earth ions showed regular changes in the addition of different rare earth oxides Fe1-xO reduction of the catalyst there is a compensation effect, the series of catalysts The conversion temperature of the reduction reaction is proportional to the ionic radius of the added rare earth elements (except for CeO2) .Rare earth oxides can effectively improve the low-temperature activity of the catalyst, the role of the addition amount of the catalyst in promoting the activity of the catalyst and the reduction of the catalyst The promotion of performance is consistent.