采用等体积浸渍法在γ-Al₂O₃中引入了B₂O₃，以较低P/Ni摩尔比（1.2）的磷酸盐作前驱体，利用程序升温还原法制备了以Al₂O₃为载体的磷化镍催化剂，并考察了催化剂的加氢脱硫反应性能。结果表明，B₂O₃抑制了Al₂O₃与磷酸盐之间的反应，降低了磷损失。获得Ni₂P所需的最低B₂O₃质量分数在10%~20%之间。当B₂O₃质量分数≤10%时，主要得到Ni₁₂P₅。在γ-Al₂O₃载体中引入B₂O₃显著提高了催化剂的加氢脱硫活性，但B₂O₃质量分数大于10%时催化剂的活性降低。二苯并噻吩在磷化镍催化剂上主要通过直接脱硫路径进行反应，引入B₂O₃提高了磷化镍催化剂酸性和加氢选择性。

B₂O₃ is inserted into γ-Al₂O₃ by an incipient wetness impregnation method,which is used as a support to prepare nickel phosphide catalysts through temperature-programmed reduction method using a nickel phosphate precursor with a low P/Ni ratio (1.2).The hydrodesulfurization performance of the catalyst is investigated.It is demonstrated that B₂O₃ may hinder the loss of phosphorus by inhibiting the reaction between phosphate precursors and γ-Al₂O₃.The minimum content of B₂O₃ in γ-Al₂O₃ required for the preparation of Ni₂P shall be between 10 wt% and 20 wt%.Ni₁₂P₅ will be obtained if the content of B₂O₃ is below 10 wt%.Addition of B₂O₃ in γ-Al₂O₃ support can lift up the hydrodesulfurization activity of the catalyst,but the activity will drop if the content of B₂O₃ exceeds 10%.Dibenzothiophene reacts on nickel phosphide catalyst mainly through direct desulfurization pathway,and the addition of B₂O₃ favors the hydrogenation pathway.

Muhammad Waqas Qureshi (1990-),男,硕士研究生,研究方向为加氢脱硫,waqas-qureshi50@yahoo.com