Acta Phys. -Chim. Sin. ›› 1992, Vol. 8 ›› Issue (03): 321-325.doi: 10.3866/PKU.WHXB19920308

• ARTICLE • Previous Articles     Next Articles

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

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