物理化学学报 >> 1992, Vol. 8 >> Issue (03): 321-325.doi: 10.3866/PKU.WHXB19920308

研究论文 上一篇    下一篇

Co-Mo/Al2O3和Ru-Co-Mo/Al2O3催化剂的不同表面钴中心表征

肖丰收; 应品良; 辛勤; 郭燮贤   

  1. 吉林大学化学系,长春 130023;大连化学物理研究所催化基础研究实验室
  • 收稿日期:1990-12-31 修回日期:1991-06-10 发布日期:1992-06-15
  • 通讯作者: 肖丰收

A Characterization of Various Co-SITES on Co-Mo/Al2O3 and Ru-Co-Mo/Al2O3 Catalysts

Xiao Feng-Shou; Ying Pin-Liang; Xin Qin; Guo Xie-Xian   

  1. Department of Chemistry, Jilin University, Changchun 130023; National Laboratory for Catalysis, Dalian Institute of Chemical Physics, Chinese Academia Sciences, Dalian 116023
  • Received:1990-12-31 Revised:1991-06-10 Published:1992-06-15
  • Contact: Xiao Feng-Shou

摘要: 利用IR、MS方法对还原态的Co-Mo/Al_2O_3和Ru-Co-Mo/Al_2O_3催化剂进行了考察。结果表明, 还原态的Co-Mo/Al_2O_3和Ru-Co-Mo/Al_2O_3表面上存在着不同的Co中心。可以十分明显地观察到, 在Co-Mo/Al_2O_3上, NO吸附的红外光谱显示了1895和1880 cm~(-1)谱带; 在TPD-MS图上显示了353, 423和473 K谱峰。通过比较Co-Mo/Al_2O_3和Ru-Co-Mo/Al_2O_3, 提出了在Ru-Co-Mo/Al_2O_3中Ru的加入主要是提高了NO在催化剂上的吸附速率和吸附量, 增强吸附键的强度。

关键词: 加氢脱硫催化剂, Co-Mo/Al2O3, Ru-Co-Mo/Al2O3, NO吸附, 红外光谱, 质谱, Co中心

Abstract: An investigation of the adsorption of NO on reduced Co-Mo/Al_2O_3 and Ru-Co-Mo/Al_2O_3 catalysts has been performed by using IR and MS spectros-copies, and it was found that two IR bands appeared at 1895 and 1880 cm~(-1) in the IR spectra and three peaks exhibited at 353, 423 and 473 K in the TPD-MS profiles. These are attributed to the various Co-sites on the surface of catalysts.Comparing Co-Mo/Al_2O_3 catalyst with Ru-Co-Mo/Al_2O_3 it was found that the addition of Ru in Ru-Co-Mo/Al_2O_3 markedly led to an increase of the rate and amount for NO adsorption, which may indicate that the HDS activity of Ru-Co-Mo/Al_2O_3 was much higher than that of Co-Mo/Al_2O_3 catalyst.

Key words: HDS catalysts, Co-Mo/Al2O3, Ru-Co-Mo/Al2O3, NO adsorption, IR, MS and Co-sites