催化学报

催化学报 ›› 2010, Vol. 31 ›› Issue (9): 1151-1156.DOI: 10.3724/SP.J.1088.2010.00137

• 研究论文 • 上一篇    下一篇

吸附相反应技术制备双金属 Ag-Ni 催化剂用于硝基苯液相加氢

蒋新, 董克增, 王海华, 王挺   

  1. 浙江大学化学工程与生物工程学系, 浙江杭州 310027
  • 收稿日期:2010-09-30 出版日期:2010-09-30 发布日期:2014-01-25

Liquid-Phase Hydrogenation of Nitrobenzene over Ag-Ni Bimetallic Catalysts Prepared by Adsorption Phase Synthesis

JIANG Xin, DONG Kezeng, WANG Haihua, WANG Ting*   

  1. Department of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, Zhejiang, China
  • Received:2010-09-30 Online:2010-09-30 Published:2014-01-25

PDF

1033

被引次数

5

摘要： 浙江大学化学工程与生物工程学系, 浙江杭州 310027 摘要：采用吸附相技术在乙醇-水体系中分别制备了硅胶和高岭土负载的 Ag-Ni 双金属催化剂, 并用于硝基苯低温液相加氢制苯胺反应. 考察了催化剂中 Ni 含量和 Ni/Ag 比对催化剂形貌和活性的影响. 结果表明, 高岭土或硅胶负载的催化剂在 Ni/Ag = 5 (摩尔比) 时活性较高, 且都存在一个最佳 Ni 含量, 分别为 0.04% 和 0.03%. 在相同条件下, 以高岭土负载的 Ag-Ni 催化剂的活性和苯胺收率更高.

关键词: 吸附相反应技术, 银, 镍, 双金属催化剂, 硝基苯, 液相加氢

Abstract: Ag-Ni bimetallic nano-catalysts were prepared using silica and kaolin as the support by adsorption phase synthesis. The activity of these catalysts was evaluated by liquid-phase hydrogenation of nitrobenzene to aniline. By changing the Ni content and Ni/Ag molar ratio in the catalysts, the differences of morphology and activity between the catalysts on two supports were investigated. The results of tempera-ture-programmed reduction and transmission electron microscopy indicate that the bimetallic catalysts show higher activity when Ni/Ag molar ratio is 5. There is an optimal Ni content in the catalysts on both silica and kaolin, which is 0.04% for kaolin and 0.03% for silica. The catalyst supported by kaolin is more active and has higher aniline yield than the catalyst supported on silica.

Key words: adsorption phase synthesis, sliver, nickel, bimetallic catalyst, nitrobenzene, liquid-phase hydrogenation