能源化学(英文版)

能源化学(英文) ›› 2003, Vol. 12 ›› Issue (3): 195-200.

• Articles • 上一篇    下一篇

Enhancement in Activity of a Vanadium Catalyst for the Oxidation of Sulfur Dioxide by Radio Frequency Plasma During the Preparation Process

Zhenxing Chen, Honggui Li, Lingsen Wang   

  1. State Key Laboratory for Powder Metallurgy, College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China
  • 出版日期:2003-09-30 发布日期:2003-09-30

Enhancement in Activity of a Vanadium Catalyst for the Oxidation of Sulfur Dioxide by Radio Frequency Plasma During the Preparation Process

Zhenxing Chen, Honggui Li, Lingsen Wang   

  • Online:2003-09-30 Published:2003-09-30

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2020

摘要： Radio frequency plasma was used to prepare a vanadium catalyst. The results showed that activating time of the catalyst could be shortened quickly and the catalytic activity was improved to some extent with the use of plasma. Catalyst Ls-9 was prepared under an optimal condition of 40 W discharge power, 10 min discharge time and 8 Pa gas pressure. The catalytic activity was up to 54.7% at 410oC, which was 2.2% higher than that of the Ls-8 catalyst. Only 10 min was needed to activate the catalyst with plasma, which was 1/9 of the traditional calcination time. For Ls-9, both the endothermic as well as the exothermic peaks detected by di erential thermal analysis shifted to higher temperatures obviously, indicating that its crystal phase could melt easily. There existed an apparent endothermic peak at 283oC. SEM photographs showed a uniform size distribution. It is inferred that the quadrivalent vanadium compound may exist mainly in the form of VOSO4.

关键词: plasma, activation, dispersion, vanadium catalyst, low-temperature activity

Abstract: Radio frequency plasma was used to prepare a vanadium catalyst. The results showed that activating time of the catalyst could be shortened quickly and the catalytic activity was improved to some extent with the use of plasma. Catalyst Ls-9 was prepared under an optimal condition of 40 W discharge power, 10 min discharge time and 8 Pa gas pressure. The catalytic activity was up to 54.7% at 410oC, which was 2.2% higher than that of the Ls-8 catalyst. Only 10 min was needed to activate the catalyst with plasma, which was 1/9 of the traditional calcination time. For Ls-9, both the endothermic as well as the exothermic peaks detected by di erential thermal analysis shifted to higher temperatures obviously, indicating that its crystal phase could melt easily. There existed an apparent endothermic peak at 283oC. SEM photographs showed a uniform size distribution. It is inferred that the quadrivalent vanadium compound may exist mainly in the form of VOSO4.

Key words: plasma, activation, dispersion, vanadium catalyst, low-temperature activity