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	Selective oxidation of propane to acrolein over MoPO/SiO2 catalyst
	Yi, XD ; Yi XD(伊晓东) ; Weng, WZ ; Weng WZ(翁维正) ; Huang, CJ ; Huang CJ(黄传敬) ; He, YM ; He YM(何益明) ; Guo, W ; Guo W(郭雯) ; Wan, HL ; Wan HL(万惠霖)
	2003
关键词	propane selective oxidation acrolein molybdenum oxide phosphorus oxide supported catalyst silica
英文摘要	The selective oxidation of propane to acrolein over the MoPO/SiO2 catalyst has been studied. MoO/SiO2 exhibits only activity for the oxidative dehydrogenation of propane to propene. The propane conversion and acrolein selectivity are evidently increased by the addition of P to MoO/SiO2. The catalysts were characterized by XRD, Raman spectroscopy, H-2-TPR, NH3-TPD and FT-IR spectroscopy. The XRD and Raman results show that crystalline MoO3 is dominant on the silica-supported molybdenum oxide catalyst, while polymolybdate species are present on P-doped catalysts. Compared to the P-O-P stretching vibration at 905 cm(-1) in PO/SiO2, the P-doped sample exhibits the Raman band of the asymmetric PO4 stretching mode at 1085 cm(-1). Therefore, Mo-O-P bonds are likely to be formed on the P-doped catalyst, and the active sites are isolated by the phosphorus in MOPO/SiO2, preventing the growth of crystallized MoO3. These changes in structure and thus the improvement in reducibility of the MoPO/SiO2 catalyst may be responsible for the increase in propane conversion and acrolein selectivity. Furthermore, the results of FT-IR spectroscopy of pyridine adsorption and NH3-TPD show that both Bronsted and Lewis acid sites on the surface of the P-doped sample are stronger than those on MoO/SiO2. These suggest that the addition of phosphorus modifies the surface structure and enhances the surface acidity of the supported catalyst, thus improving the behavior of the catalyst.
语种	中文
出版者	SCIENCE CHINA PRESS
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/12035]
专题	化学化工－已发表论文
推荐引用方式 GB/T 7714	Yi, XD,Yi XD,Weng, WZ,et al. Selective oxidation of propane to acrolein over MoPO/SiO2 catalyst[J],2003.
APA	Yi, XD.,伊晓东.,Weng, WZ.,翁维正.,Huang, CJ.,...&万惠霖.(2003).Selective oxidation of propane to acrolein over MoPO/SiO2 catalyst..
MLA	Yi, XD,et al."Selective oxidation of propane to acrolein over MoPO/SiO2 catalyst".(2003).

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