Preparation of Ni/bentonite catalyst and its applications in the catalytic hydrogenation of nitrobenzene to aniline

作     者：Yuexiu Jiang Xiliang Li Zuzeng Qin Hongbing Ji 

作者机构：Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology School of Chemistry and Chemical Engineering Guangxi University School of Chemistry and Chemical Engineering Sun Yat-sen University 

出 版 物：《Chinese Journal of Chemical Engineering》 (中国化学工程学报（英文版）)

年 卷 期：2016年第24卷第9期

页      面：1195-1200页

核心收录：

学科分类：081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 

基　　金：Supported by the National Natural Science Foundation of China(21566005,21425627) Natural Science Foundation of Guangxi province(2014GXNSFAA118049) the Open Project of Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology(2013K011) the Patent Project of Colleges and Universities of Guangxi Zhuang Autonomous Region(KY2015ZL001) 

主　　题：Ni/bentonite catalyst Catalysis Support Hydrogenation Nitrobenzene 

摘      要：Ni supported on bentonite was prepared by the impregnation method with different nickel contents, applied to the hydrogenation of nitrobenzene to aniline in a fixed-bed reactor, and it was characterized by X-ray diffraction（XRD）, H2-temperature programmed reduction（H2-TPR）, and X-ray photoelectron spectrometry（XPS）. The results showed that Ni/bentonite catalyst with 20 wt% nickel content provided a higher conversion of nitrobenzene and selectivity of aniline compared to other catalysts. NiO was the precursor of the active component of the catalyst, and the small crystallite size as well as the highly dispersed NiO on the Ni/bentonite-20 catalyst, contributed to the catalytic performance. The hydrogenation of nitrobenzene was carried out at 300℃ with a H_2 gaseous hourly space velocity of 4800 ml·（g cat）^-1·h^-1and a nitrobenzene liquid hourly space velocity of4.8 ml·（g cat）^-1·h^-1 over Ni/bentonite-20. A 95.7% nitrobenzene conversion and 98.8% aniline selectivity were obtained. While the nitrobenzene liquid hourly space velocity was 4.8 ml·（g cat）^-1·h^-1, the yield of aniline was more than 95.0% during a 10-hour reaction.