Ni-Mn-Ce-K/铝土矿催化剂的制备和还原条件对水煤气变换性能的影响  

Effects of Preparation and Reduction Conditions on Activity of Ni-Mn-Ce-K/bauxite Catalyst for Water-Gas Shift Reaction

作　　者：江莉龙[1] 杨阳[1] 叶炳火[1] 魏可镁[1] 

机构地区：[1]福州大学化肥催化剂国家工程研究中心,福建福州350002

出　　处：《分子催化》2010年第2期147-152,共6页Journal of Molecular Catalysis(China)

基　　金：福建省教育厅计划资助项目(JA09012);福建省发改委"小发明;小创造"资助项目

摘　　要：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.The Multiple-metal Catalysts （Ni-Mn-Ce-K/bauxite） for Water-Gas Shift Reaction were prepared by equivalent-volumetric impregnation method, and characterized by TG, DTA and TPR. Meanwhile, systematic investigation was carried out to identify the optimum preparation and reduction parameters. The optimum process was as following： In the first impregnation step, the loading ratio of Ni ： Mn： Ce was 8： 7 ： 4 and the calcination temperature was 500 ℃ ; in the second impregnation step, the loading of K was 5 %, the reduction temperature was 500 ℃, besides a proper amount of steam was needed. As compared with the commercial catalysts, the Ni-MnCe-K/bauxite catalyst prepared and reduced under optimum conditions exhibits more excellent catalytic performance and thermal stability for water-gas-shift reaction.

关 键 词：铝土矿 水煤气变换催化剂 Ni—Mn—Ce 制备参数 还原条件 

分 类 号：O643.3[理学—物理化学]