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高等学校化学研究 ›› 1990, Vol. 6 ›› Issue (4): 346-353.

• Articles • 上一篇    下一篇

XPS,Chemical Trapping, and DRFTIR Study on Mechanism of By-Products Formation in Selective (AMM)Oxidation of Propylene on MoO3 and γ-Bi2MoO6

Weng Weizheng, Yan Jiyang, Cai Junxiu, Dai Shenjun,Cao Shoujing, Chen Lingling, Wan Huilin   

  1. Department of Chemistry, Xiamen University, Ximen
  • 收稿日期:1990-10-04 出版日期:1990-12-24 发布日期:2011-09-09
  • 基金资助:

    Supported by the National Natural Science Fundation of China.

XPS,Chemical Trapping, and DRFTIR Study on Mechanism of By-Products Formation in Selective (AMM)Oxidation of Propylene on MoO3 and γ-Bi2MoO6

Weng Weizheng, Yan Jiyang, Cai Junxiu, Dai Shenjun,Cao Shoujing, Chen Lingling, Wan Huilin   

  1. Department of Chemistry, Xiamen University, Ximen
  • Received:1990-10-04 Online:1990-12-24 Published:2011-09-09
  • Supported by:

    Supported by the National Natural Science Fundation of China.

PDF (PC)

摘要： XPSand chemical trapping experments with H2, NH3, and CH3Ias trapping agents were carried out for studying the adsorption of propylene over MoO3 or γ-Bi2MoO6. The results show that the fragmentation of carbon chain takes place during the adsorption of propylene through breaking C -Cdouble bond and C-Cbond on Mo2+ and the adjacent lattice oxygen, leading to formation of the oxygen- or nitrogen-containing by-products of C1 and C2 species. Diffuse-Reflection Fourier Transform Infrared (DRFTIR) Spectroscopy was used to study the surface species formed during the chemisorption and reaction of propylene over y-Bi2MoO6 at a lower temperature. The results that C1, C2 adspecies were detected by DRFTIRat 175℃ are consistent with the results of XPSand chemical trapping experiments, whlle the results at 50℃ Grasselli et al.

关键词: Selective (amm)oxidation of propylene, Mechanism of by-products formation, Chemical trapping, DRFTIR

Abstract: XPSand chemical trapping experments with H2, NH3, and CH3Ias trapping agents were carried out for studying the adsorption of propylene over MoO3 or γ-Bi2MoO6. The results show that the fragmentation of carbon chain takes place during the adsorption of propylene through breaking C -Cdouble bond and C-Cbond on Mo2+ and the adjacent lattice oxygen, leading to formation of the oxygen- or nitrogen-containing by-products of C1 and C2 species. Diffuse-Reflection Fourier Transform Infrared (DRFTIR) Spectroscopy was used to study the surface species formed during the chemisorption and reaction of propylene over y-Bi2MoO6 at a lower temperature. The results that C1, C2 adspecies were detected by DRFTIRat 175℃ are consistent with the results of XPSand chemical trapping experiments, whlle the results at 50℃ Grasselli et al.

Key words: Selective (amm)oxidation of propylene, Mechanism of by-products formation, Chemical trapping, DRFTIR