Pd/C催化剂的制备与活性

研究了Pd／C催化剂制备因素对加氢催化活性的影响，实验结果表明，活性中心之间存在着“集团效应”；Pd／C催化剂中Pd含量较高时，催化剂具有较高的比活性；载体颗粒小，则有利于提高活性组份的分散度，但由于“集团效应”，只有适当的载体粒度才有利于提高Pd／C催化剂的活性。载体的酸洗预处理也能促进催化剂治性提高，还原方式与条件亦有一定的影响。

Preperation of Pd/C and Its Catalytic Activity

The effect of prepration factors of Pd/C on their activities of hydrogenation has been studied.There is a "group effect" among the active centres. The higher content of Pd/C, the higher catalytic activity. Reduing the grain size of active carbon carrier will incease the dispersive degree of active ingredient, but because of the "group effect", a proper graininess of carrier is favorable to increase the catalytic activity of Pd/C, and pre-impregnating the carrier with acid solution will increase the activity of the catalyst. The method and the condition of reduction of catalysts have also some influences on their catalytic activities.