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Citation: Li Ming-Xiu, Song Tian-Le, Yang Shu-Tao, Wang Xin-Kui, Zhang Zhi-Xin, Zhou Jing-Lai. Influence of Thulium Doped VPO Catalyst on Characterization of Catalyst[J]. Acta Physico-Chimica Sinica, ;1995, 11(08): 734-737. doi: 10.3866/PKU.WHXB19950813 shu

Influence of Thulium Doped VPO Catalyst on Characterization of Catalyst

1.
Department of Chemistry,Hebei Teachers College,Shijiazhuang 050091;Institute of Coal Chemistry,Chinese Academy of Sciences,Taiyuan 030001

Received Date: 12 July 1994
Available Online: 15 August 1995

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.
- Thulium,
- VPO catalyst,
- n-Butane,
- Maleic anhydride
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