催化学报

催化学报 ›› 2009, Vol. 30 ›› Issue (12): 1287-1290.

• 研究论文 • 上一篇    

铁、钴或镍助剂促进的 Ag/SiO2 催化剂上气相催化合成 3-甲基吲哚

吕文辉, 刘兴海, 刘冬妍, 石 雷, 孙 琪   

  1. 辽宁师范大学化学化工学院功能材料化学研究所, 辽宁大连 116029
  • 收稿日期:2009-12-25 出版日期:2009-12-25 发布日期:2013-09-29

Vapor-Phase Synthesis of 3-Methylindole over Fe-, Co-, or Ni-Promoted Ag/SiO2 Catalysts

 LÜ  Wen-Hui, LIU  Xing-Hai, LIU  Dong-Yan, SHI  Lei, SUN  Qi   

  1. Institute of Chemistry for Functionalized Materials, Faculty of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian 116029, Liaoning, China
  • Received:2009-12-25 Online:2009-12-25 Published:2013-09-29

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摘要： 将铁、钴或镍促进的 Ag/SiO2 催化剂用于苯胺和 1,2-丙二醇气相催化合成 3-甲基吲哚的反应中, 并采用 X 射线衍射、H2-程序升温还原和热重分析等技术对催化剂进行了表征. 结果表明, 铁或镍助剂的加入有助于提高 Ag/SiO2 催化剂的选择性. 其中, 铁的加入能增强活性组分银与载体间相互作用, 大大促进了银在载体表面上的分散, 使催化剂的初活性显著提高. 而钴或镍的加入虽然能略微减少反应过程中 Ag/SiO2 催化剂表面的积炭, 但加剧了银在反应过程中的烧结, 导致催化剂稳定性下降.

Abstract: Fe, Co, or Ni as a promoter was added into the Ag/SiO2 catalyst for the vapor-phase synthesis of 3-methylindole from aniline and 1,2-propanediol. The promoted Ag/SiO2 catalysts were characterized by X-ray diffraction, H2 temperature-programmed reduction, and thermogravimetry. The results indicated that the addition of Fe or Ni to Ag/SiO2 was favorable for the increase of the catalyst selectivity. Among them, Fe could reinforce the interaction between the silver active component and the support and greatly promote the dispersion of silver particles on the support, which resulted in the remarkable increase in the initial activity of the catalyst. Adding Co or Ni to Ag/SiO2 promoted the sintering of silver during the reaction although it reduced the coking a little. As a result, the stability of the catalysts decreased.

Key words: iron, cobalt, nickel, promoter, silver, silica, supported catalyst, 3-methylindole