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Citation: Li Zhi-Xiu, Yang Shu-Tao, Song Tian-Le, Wang Xin-Kui, Zhang Zhi-Xin, Zhou Jing-Lai. Effect of Adding Pr on Properties of VPO Catalyst[J]. Acta Physico-Chimica Sinica, ;1997, 13(06): 548-553. doi: 10.3866/PKU.WHXB19970613 shu

Effect of Adding Pr on Properties of VPO Catalyst

1.
Department of Chemistry,Hebei Teachers College,Shijiazhuang 050091

Received Date: 23 September 1996
Available Online: 15 June 1997

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