Co-Mo/Al<SUB>2</SUB>O<SUB>3</SUB>加氢脱硫催化剂的CO吸附原位红外光谱表征及应用研究

doi:10.3964/j.issn.1000-0593(2008)09-2044-04

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Abstract Due to the implementation of more stringent specifications in sulfur content for diesel oil, a deep understanding of the active phase of Co-Mo/Al₂O₃ catalysts is necessary to the development of ultra-deep hydrodesulphurization (HYD) catalysts. A series of reductive Co-Mo/Al₂O₃ catalysts prepared in the lab and the high-active industrial catalyst (G) were studied by in-situ FTIR using CO as probe molecule. The showed a good relationship with the desulphurization activities of the catalysts. With the increase in MoO₃ and CoO loading, the desulphurization activity of catalyst increases, and the infrared spectrum changes with the amount of CO adsorbed on the catalyst. There is a new band at 2 179　cm^-1 when the MoO₃ loading is up to 20% and CoO up to 4.16%. According to the activities of the catalysts, the appearance of this new band suggests that the catalyst has higher hydrodesulphurization (HYD) activity. Compared with the infrared spectrum of CO on the catalyst of the same MoO₃ and CoO loading by the common preparation method, the catalyst prepared with chelating agents has higher HYD activity and its band at 2　179　cm^-1 is stronger. The infrared spectrum of CO adsorbed on optimum Co-Mo/Al₂O₃ catalyst prepared in the lab is similar to the highly active industrial catalyst (G). Their bands at 2　179　cm-1 are both very strong and their HYD activities are both higher than the others. Thus, the appearance and the increase of the band at 2　179　cm^-1 indicate the increase in the HYD activity of Co-Mo/Al₂O₃ catalysts to some extent, which could be an effective tool for developing ultra-deep HYD catalysts.

Key words：In-situ FTIR;Carbon monoxide;Hydrodesulphurization catalyst

Received: 2007-02-08 Accepted: 2007-05-12

ZTFLH:

O643

Corresponding Authors: XU Guang-tong E-mail: xugt@ripp-sinopec.com

Cite this article:

YUAN Hui,SUN Shu-ling,ZHENG Ai-guo, et al. In-situ FTIR Study of CO Adsorption on Co-Mo/Al₂O₃ Hydrodesulphurization Catalysts[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2008, 28(09): 2044-2047.

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https://www.gpxygpfx.com/EN/10.3964/j.issn.1000-0593(2008)09-2044-04 OR https://www.gpxygpfx.com/EN/Y2008/V28/I09/2044

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