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以改性铝土矿为载体,采用等体积浸渍法,制备了Ni-Mn-Ce-k体系水煤气变换催化剂.通过TG、DTA、TPR和活性表征等方法,系统考察了制备和还原条件对催化剂水煤气变换性能的影响.结果表明:催化剂的优化制备工艺为:第一步浸渍组分Ni、Mn、Ce的盐溶液(其摩尔配比为8:7:4),焙烧温度500℃,第二步浸渍K的加入量为5%(W),还原最高温度为500℃,还原过程添加适量的水蒸气,制得的催化剂具有良好的催化性能和热稳定性能,优于国内外现行工业产品.
Ni-Mn-Ce-k system water-gas shift catalyst was prepared by the same volume impregnation method using modified bauxite as support.According to the methods of TG, DTA, TPR and activity characterization, the effects of preparation and reduction conditions on the catalyst Water gas shift performance.The results show that the optimized preparation process of the catalyst is as follows: the first step is to impregnate the salt solution of Ni, Mn, Ce (the molar ratio is 8: 7: 4), the calcination temperature is 500 ℃, the second The amount of K impregnated in the step is 5% (W), the maximum reduction temperature is 500 ℃, and the appropriate amount of water vapor is added in the reduction process. The obtained catalyst has good catalytic performance and thermal stability and is superior to the current industrial products at home and abroad.