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Preparation of Ni/bentonite catalyst and its applications in the catalytic hydrogenation of nitrobenzene to aniline
【文件类型】 【消费金额】1.8 【文章页数】6 【会员操作】  
【文章作者】Yuexiu Jiang;Xiliang Li;Zuzeng Qin;Hongbing Ji;
【文章摘要】      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), H_2-temperature programmed reduction(H_2-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. Ni O was the precursor of the active component of the catalyst, and the small crystallite size as well as the highly dispersed Ni O on the Ni/bentonite-20 catalyst, contributed to the catalytic performance. The hydrogenation of nitrobenzene was carried out at 300 °C with a H_2 gaseous hourly space velocity of 4800 ml·(g cat)~(-1)·h~(-1)and 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.
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【期刊】Chinese Journal of Chemical Engineering【卷】【ISSUE】【ISSUEID】    【文章期份】2016    【发布日期】2017/2/18 0:00:00    点击率:1    打印    关闭
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