Acta Phys. -Chim. Sin. ›› 1997, Vol. 13 ›› Issue (06): 548-553.doi: 10.3866/PKU.WHXB19970613

• ARTICLE • Previous Articles     Next Articles

Effect of Adding Pr on Properties of VPO Catalyst

Li Zhi-Xiu,Yang Shu-Tao,Song Tian-Le,Wang Xin-Kui,Zhang Zhi-Xin,Zhou Jing-Lai   

  1. Department of Chemistry,Hebei Teachers College,Shijiazhuang 050091|Institute of Coal Chemistry,Chinese Academy of Sciences,Taiyuan 030001
  • Received:1996-09-23 Revised:1997-01-27 Published:1997-06-15
  • Contact: Li Zhi-Xiu

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Abstract:

Influence of doping Pr on the characteristics of VPO catalyst was investigated by means of XRD, XPS, ESR, 31P NMR, NH3-TPD and IR techniques. The catalysts were used in the selective oxidation of n-butane to maleic anhydride. Experimental results showed that, when Pr/V(atomic ratio)=0.05,the amount of (VO)2P2O7 was increased and the surface acidity was enhanced, and the conversion of n-butane and the selectivity to maleic anhydride reached a maximum value respectively. While Pr/V≥0.10, the amount of(VO)2P2O7 and surface acidity were decreased and the activity of catalysts was reduced.

Key words: Praseodymium, VPO catalyst, n-Butane, Maleic anhydride