助剂对Ru-B/ZrO_2非晶合金催化剂性能及表面性质的影响

The Effects of Promoters on the Catalytic Properties and Surface Character of Ru-B/Zr_2 Amorphous Alloy Catalysts

在活性选择性测定的基础上,利用BET比表面测定,TPR、DSC等手段研究了Fe、Zn、La和Ce等助剂对苯加氢制环己烯Ru-B/ZrO2非晶合金催化性能及表面性质的影响.结果表明,助剂能明显改善催化剂的活性和选择性,提高Ru-B/ZrO2非晶合金的热稳定性,影响催化剂的表面性质,改善催化剂的还原行为.在催化反应条件下,活性组分Ru有金属态和Ru-B-O两种物种,作者认为,它们分别与催化剂的活性和选择性有关.

On the basis of the measurement of activity and selectivity, the effects of Fe, Zn, La and Ce promoters on the catalytic properties and surface character of Ru-B/Zr_2 amorphous alloy catalysts have been studied by means of BET surface measurement, DSC and TPR etc. The results show that the promoters can increase the activity and selectivity evidently, enhance thermal stability of the amorphous alloy catalysts, influence on surface properties and reduction behavior of the catalysts. It was found that there are metal state and Ru-B-O species for Ru as an active component under the catalytic reaction conditions, which are relative to the activity and selectivity respectively.