CIESC Journal ›› 2012, Vol. 63 ›› Issue (1): 121-126.DOI: 10.3969/j.issn.0438-1157.2012.01.017

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Hydrogenation of nitrobenzene to aniline on amorphous Ni-Mo-P catalysts and mechanism of catalyst deactivation

LIU Zili1,2,QIN Zuzeng2,ZHANG Jianjie1,WANG Yanhua2   

  1. 1School of Chemistry and Chemical Engineering,Guangzhou University;2School of Chemistry and Chemical Engineering, Guangxi University
  • Received:2011-04-26 Revised:2011-09-07 Online:2012-01-05 Published:2012-01-05

非晶态Ni-Mo-P催化剂上硝基苯加氢为苯胺及催化剂失活机理

刘自力1,2,秦祖赠2,张健杰1,王燕华2   

  1. 1广州大学化学化工学院;2广西大学化学化工学院
  • 通讯作者: 刘自力

Abstract: The process of nitrobenzene hydrogenation to aniline using an amorphous Ni-Mo-P alloy as the catalyst and the deactivation mechanism of the amorphous Ni-Mo-P alloy catalyst were studied. Investigation of the effects of reaction time,temperature,and hydrogen pressure on nitrobenzene hydrogenation to aniline using the Ni-Mo-P catalyst revealed optimum conditions as 90 min,383 K,and 1.8 MPa.Under these conditions,the yield of aniline reached 98.2% using the amorphous Ni-Mo-P catalyst after nitrobenzene hydrogenation for 15 h,indicating excellent activity stability of the amorphous Ni-Mo-P catalyst.Deactivation of the amorphous Ni-Mo-P catalyst was due mainly to nitrobenzene hydrogenation byproducts covering the catalyst activity sites,which made it difficult for reactant molecules to access the catalyst activity sites and was highly unfavorable to the catalytic reaction.

Key words: amorphous Ni-P catalyst, Mo modification, nitrobenzene, hydrogenation, aniline

关键词: 非晶态Ni-P催化剂, Mo改性, 硝基苯, 加氢, 苯胺

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