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Citation: HE Yi-Ming, YI Xiao-Dong, HUANG Chuan-Jing, YING Fang, ZHANG Xiao-Bing, WENG Wei-Zheng, WAN Hui-Lin. Role of Te on Selective Oxidation of Propane to Acrolein over MoBiTeO/SiO₂ Catalysts[J]. Acta Physico-Chimica Sinica, ;2007, 23(06): 851-855. doi: 10.3866/PKU.WHXB20070611 shu

Role of Te on Selective Oxidation of Propane to Acrolein over MoBiTeO/SiO₂ Catalysts

1.

State Key Laboratory for Physical Chemistry of the Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian Province, P. R. China

Received Date: 6 November 2006
Available Online: 26 April 2007

A series of MoBiTeO/SiO2 catalysts with different Te contents was prepared by impregnation method. Effect of Te on the catalysts’ structure, acidity and catalytic performance for selective oxidation of propane to acrolein was investigated by XRD, Raman, XPS, NH3-TPD, FT-IR, and performance evaluation techniques. The results indicated that by forming Mo—O—Te bond with the Mo species, tellurium component in the catalyst improved the dispersion of Mo oxide species that would be favorable to the formation of isolate active sites on the catalysts. Besides, Te could be the centers for α-H abstraction of propene and O-insertion to allyl species. So, the addition of Te to MoBiO/SiO2 catalyst promoted the acrolein selectivity greatly. However, the addition of telluriumalso could contribute the formation of B acid sites in MoBiTeO/SiO2 catalysts that had been proved to be harmful to the generation of acrolein. Therefore, there existed an optimal scale for the amount of Te-content in the MoBiTeO/SiO2 catalysts. When the nTe/nMo ratio was 0.05-0.1, the catalyst showed the best catalytic performance.
- Propane; Acrolein; Selective oxidation; Te; Acidity
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Role of Te on Selective Oxidation of Propane to Acrolein over MoBiTeO/SiO2 Catalysts

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通讯作者: 陈斌, bchen63@163.com

Role of Te on Selective Oxidation of Propane to Acrolein over MoBiTeO/SiO₂ Catalysts