Mo-Ni-P 纳米粒子催化剂的制备与表征

摘要

A kind of alumina with large pore volume and framework structure has been prepared by using secondary nanoscale self-assembly process. It can be used as the catalyst support. The Mo-Ni-P nanoscale self-assembly alumina catalysts are prepared by adding surfactant A and B in order to modify the loading methods of dual activity metal on the alumina supports. The result shown that from the BET characteriza-tion,as for the system catalysts A,the most pore volumes and specific surface areas are 0. 49 cm3 / g and 211 cm2 / g,respectively,and the pore distribution between 10 ~ 60 nm accounted for more than 50% . That of B system,are 0. 41 cm3 / g and 202 cm2 / g,the pore distribution between 6 ~ 30 nm accounted for 55. 72% . Furthermore,the pore distribution are more than 10% at 0 ~ 6 nm and 60 ~ 100 nm. By analy-zing the result,the active of catalysts which have been absorbed by MNP has increased greatly,and these MNP nanoscale catalysts can be used in residue hydrotreating aspects.%采用二次纳米自组装方法合成大孔容构架式结构的氧化铝载体及催化剂。通过加入不同表面活性剂 A、B改善 Mo-Ni 双金属活性组分的负载方式，制备 Mo-Ni-P 纳米自组装氧化铝催化剂。通过 BET 对催化剂进行表征，结果表明，A 系列催化剂的最大孔容和比表面积分别为0.49 cm3/ g 和211 cm2/ g，孔道集中分布在10~60 nm 之间，所占的比例平均在50%以上；B 系列催化剂最大孔容和比表面积分别为0.41 cm3/ g 和202 cm2/ g，孔道集中分布在6~30 nm 之间，所占的比例平均为55.72%。并且 A、B 系列催化剂在0~6 nm 和60~100 nm 之间的孔分布也有10%以上的分布。由此可知，表面活性剂可以与金属形成一种稳定的自组装体，从而提高活性金属在载体上的分散性，并且这种多极孔存在的 Mo-Ni-P 纳米粒子催化剂适用于渣油等重油的加氢处理。