Ni/Al-MoS_2应用于硝基苯液相催化加氢制苯胺

Ni/Al-MoS_2 CATALYSTS FOR LIQUID-PHASE HYDROGENATION OF NITROBENZENE TO ANILINE

在超声波作用下,采用单分子层剥离-重堆技术,正丁基锂柱插MoS2夹层,合成了前驱体LixMoS2和Ni/Al-MoS2复合材料。将该复合材料作为催化剂,用于硝基苯液相催化加氢制苯胺反应。考察了Ni/Al-MoS2催化剂的n(Ni)/n(Al),催化反应温度、H2分压对其催化活性的影响。结果表明,采用n(Ni)/n(Al)=0.5的Ni/Al-MoS2催化剂,在反应温度383 K、H2分压2.0 MPa、液时空速3 h-1的反应条件下,硝基苯加氢制备苯胺反应获得最大转化率和收率,硝基苯的转化率为99.1%,苯胺的收率为98.8%。本研究结果为工业装置的技术改造提供了有用的实验依据。

Remonitory LixMoS2 and Ni/Al-MoS2 composite were prepared by n-butyl lithium intercalating in the MoS2 layers, with the single-molecular-layer exfoliated-restacked technology and under the effect of ultrasonic waves. The synthesized Ni/Al-MoS2 composite was used as catalyst in the liquid-phase hydrogenation catalytic reaction of nitrobenzene to aniline. The effects of n（Ni）/ n（Al） in Ni/Al-MoSe catalyst, and the reaction temperature and H2 pressure on the catalytic performance of Ni/Al-MoS2 were investigated. The results showed that under the reaction conditions of 383 K, 2.0 MPa H2, LHSV 3 h^- 1 and with n（Ni）/n（Al）=0.5 of Ni/Al-MoS2 catalyst, the reaction conversion and aniline yield reached the maximum value, which were 99.1% and 98. 8% , respectively. This study could provide useful experimental data for the technical reform of industry equipment.