Acta Phys. -Chim. Sin. ›› 1995, Vol. 11 ›› Issue (08): 734-737.doi: 10.3866/PKU.WHXB19950813

• Note • Previous Articles     Next Articles

Influence of Thulium Doped VPO Catalyst on Characterization of Catalyst

Li Ming-Xiu,Song Tian-Le,Yang Shu-Tao,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:1994-07-12 Revised:1994-11-28 Published:1995-08-15
  • Contact:

PDF

3016

Like

Abstract:

Phase composition, surface characterization and catalytic performance of VPO and thulium doped VPO catalysts were investigated by means of NH3-TPD, XPS,XRD and IR. Experimental results showed that when Tm/V (atomic ratio) ＜0.10, both Bronsted and Lewis acidities on the surface of VPO catalysts with the addition of thulium were stronger than those of VPO catalyst, the doped catalyst accelerated the dehydrogenation step of the oxidation reaction of n-butane. Conversion of n-butane and selectivity to maleic anhydride were enhanced. While Tm/V≧0.10, the surface acidity of the catalysts was decreased and the activity of catalyst was dropped.

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