Abstract Novel Pd catalysts were prepared with different metal promoters by wet impregnation method. And the catalytic performance of dichloroacetic acid (DCA) hydrogenation was studied in fixed-bed reactor. XRD and TEM were used to characterize the structure of catalysts. The results show that the additives of Ce, Fe and Ca can improve the uniformity of Pd particles, and change the particle size of Pd. The catalytic results show that additive of Ca exhibited the best catalytic performance of DCA hydrogenation, the residual DCA is only 0.01% and excessive dechlorination is effectively avoided.

中文翻译：

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纳米钯的表面改性及其在选择性脱氯反应中的应用

摘要 采用湿法浸渍法制备了不同金属助催化剂的新型钯催化剂。并在固定床反应器中研究了二氯乙酸(DCA)加氢的催化性能。XRD和TEM用于表征催化剂的结构。结果表明，Ce、Fe、Ca的添加可以提高Pd颗粒的均匀性，改变Pd的粒径。催化结果表明，添加Ca对DCA加氢表现出最佳催化性能，残留DCA仅为0.01%，有效避免了过度脱氯。