硫化型NiMoS/CNTs加氢催化剂的制备与性能研究

以碳纳米管为载体，以含硫前驱物四硫代钼酸铵为钼源，采用等体积浸渍法制备了以Mo-Ni为主要活性组分的硫化型NiMoS/CNTs加氢催化剂。在固定床高压微反装置上考察了NiMoS/CNTs催化剂上二苯并噻吩（DBT）加氢脱硫（HDS）性能，并与NiMoS/γ-Al2O3催化剂进行了对比。评价结果表明，NiMoS/CNTs催化剂的HDS活性和选择性明显高于NiMoS/γ-Al2O3催化剂。碳纳米管负载的NiMoS/CNTs催化剂起始还原温度较低，具有更高的二硫化钼堆积层数、Mo4+原子占比和适宜的二硫化钼晶片长度，活性位密度大，这是催化剂加氢性能高的主要原因。

Preparation and performance of sulfided NiMoS/CNTs hydrogenation catalyst

Sulfided NiMoS/CNTs hydrogenation catalyst with Mo-Ni as the major active component was prepared with CNTs as support and sulfurization precursor ammonium tetrathiomolybdate as molybdenum source，by incipient wetness impregnation method.The hydrodesulfurization（HDS） performance of dibenzothiophene（DBT） on NiMoS/CNTs catalyst by using flow microhigh pressure reactor was researched and compared with NiMoS/γ-Al2O3.The evaluation results indicated that，NiMoS/CNTs catalyst has much higher HDS activity and selectivity than NiMoS/γ-Al2O3 catalyst.The CNTs-supported NiMoS/CNTs catalyst has a lower initial reduction temperature，higher molybdenum disulfide stacking layer，higher Mo4+ atomic ratio，suitable molybdenum disulfide wafer length and high density of active site，which is the main reason for high performance of hydrogenation catalyst.