Ultrafine Catalysts for Hydrodesulfurization(Ⅱ)──Surface Properties of UFP-Mo/Al2O3Catalysts

Chem. J. Chinese Universities ›› 1995, Vol. 16 ›› Issue (1): 103.

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Ultrafine Catalysts for Hydrodesulfurization(Ⅱ)──Surface Properties of UFP-Mo/Al₂O₃Catalysts

FENG Li-Juan¹, CHEN Song-Ying¹, PENG Shao-Yi¹, WEI Shao-Bin², XIN Qin²

1. State Key Lab. of Coal Conv., Institute of Coal Chem., Chinese Academy of Sci., Taiyuan, 030001;
2. State Key Lab. for Catal., Dalian Institute of Chem. Phys., Chinese Academy of Sci., Dalian

Received:1994-02-03 Revised:1994-06-20 Online:1995-01-24 Published:1995-01-24

Abstract

Abstract: XPS was used for determining the surface properties of UFP-Mo/Al₂O_3.It is shown that all molybdenum existed in Mo⁶⁺form on the surface of oxidized UFP-Mo/Al₂O₃catalysts,while a mixture of Mo⁶⁺,Mo⁴⁺,S⁶⁺as well as S^2-was observed on the surface of the catalysts after HDSreaction.The ratio of Mo and Sspecies with different valences ispronouncedly affedted by the preparation method and the Mo loading. The portion of Mo⁶⁺and S⁶⁺decreases with increasing Mo loading.The contents of Mo⁶⁺and S⁶⁺of s-UFP-Mo/Al₂O₃catalysts are higher than those of i-UFP-Mo/Al₂O₃for the same Mo loading.

Key words: XPS, UFP-Mo/Al₂O₃, Surface properties

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FENG Li-Juan, CHEN Song-Ying, PENG Shao-Yi, WEI Shao-Bin, XIN Qin. Ultrafine Catalysts for Hydrodesulfurization(Ⅱ)──Surface Properties of UFP-Mo/Al₂O₃Catalysts[J]. Chem. J. Chinese Universities, 1995, 16(1): 103.

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Ultrafine Catalysts for Hydrodesulfurization(Ⅱ)──Surface Properties of UFP-Mo/Al₂O₃Catalysts

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