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

ZHANG Yu-han; LING Feng-xiang; WANG Shao-jun; ZHAO Guo-li

Volume 41 Issue 06

Jun. 2013

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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(06): 710-714.

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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(06): 710-714.

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

1.
Liaoning Shihua University, Fushun 113001, China;
2.
Fushun Research Institute of Petroleum and Petrochemicals, SINOPEC, Fushun 113001, China

Received Date: 2012-11-06
Rev Recd Date: 2013-01-08
Publish Date: 2013-06-30

Abstract

Abstract

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.
- Co-Mo/&gamma,
- -Al₂O₃ catalysts,
- in-situ FT-IR,
- probe molecules,
- active sites

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References(25)

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