制备条件对磷化钼加氢脱硫催化活性的影响

采用程序升温还原方法制得磷化钼(MoP)催化剂，在常压连续微型化反应装置中，以噻吩为模型化合物，对催化剂的加氢脱硫活性进行评价。考察了还原温度、磷钼摩尔比、不同磷源等制备条件对MoP催化活性的影响。实验结果表明，在MoP生成温度区间内，随着还原温度的升高，催化剂活性降低；磷钼摩尔比为1∶1时，噻吩转化率最高，而磷钼摩尔比为1∶2和2∶1时制备催化剂的催化活性相当；采用磷酸二氢铵、磷酸铵以及磷酸为磷源，均可制得磷化钼，而以磷酸二氢铵为磷源时制备磷化钼催化剂的活性最佳。在噻吩加氢脱硫反应条件下反应后，不同磷源制备的磷化钼整体物相均没有发生变化。

Influence of the synthesis on HDS activity of molybdenum phosphide catalysts

Molybdenum phosphide catalyst was prepared via temperature-programmed reduction method,and the hydrodesulfurization catalytic activity was evaluated at atmosphere pressure with thiophene as model compound.Effects of preparation conditions,such as reduction temperature,P/Mo mol ratio and phosphor source on hydrodesulfurization activity were also investigated.Results indicate that the activity decreased with the increase of reduction temperature.And there was an optimal P/Mo mol ratio for preparing catalyst w...