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Citation: ZHANG Yu-han, LING Feng-xiang, WANG Shao-jun, ZHAO Guo-li. An in-situ FT-IR study on the CO and NO co-adsorption on the Co-Mo/γ-Al2O3 catalysts[J]. Journal of Fuel Chemistry and Technology, ;2013, 41(6): 710-714. shu

An in-situ FT-IR study on the CO and NO co-adsorption on the Co-Mo/γ-Al2O3 catalysts

  • 1.

    1. Liaoning Shihua University, Fushun 113001, China;

  • Corresponding author: LING Feng-xiang, 
  • Received Date: 6 November 2012
    Available Online: 8 January 2013

  • The active sites of reduced Mo/γ-Al2O3 and Co-Mo/γ-Al2O3 hydrotreating catalysts were studied by in-situ FT-IR using CO and NO as probe molecules; the results were correlated with their activity in hydrodesulfurization (HDS) and behavior in temperature programmed reduction (H2-TPR). The results indicate that there exist three main adsorption sites on the surface of Co-Mo/γ-Al2O3 catalysts. The addition of cobalt to Mo/γ-Al2O3 is able to modify Mo sites and to introduce active Co sites; an increase of the molybdenum content may also increase the number of active sites and improve the catalytic activity of Co-Mo/γ-Al2O3. FT-IR spectra of CO and NO co-adsorption is able to distinguish the spectra overlapping of different active sites, which reveals that CO and NO are actually adsorbed on different Mo active sites.
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