能源化学(英文版)

能源化学(英文) ›› 2003, Vol. 12 ›› Issue (2): 139-144.

• Articles • 上一篇    下一篇

Activity Enhancement of Vanadium Catalysts with Ultrasonic Preparation Process for the Oxidation of Sulfur Dioxide

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:2003-06-30 发布日期:2003-06-30

Activity Enhancement of Vanadium Catalysts with Ultrasonic Preparation Process for the Oxidation of Sulfur Dioxide

Zhenxing Chen, Honggui Li, Lingsen Wang   

  • Online:2003-06-30 Published:2003-06-30

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摘要： The e ect of ultrasonic cavitations on the activity of vanadium catalysts at low temperatures for the oxidation of sulfur dioxide, in which re ned carbonized mother liquor had been added, was investigated. Twenty minutes were needed to produce obvious cavitations when the catalyst raw material was treated in the 50 W ultrasonic generator. However, only 10 minutes would be needed in a 150 W ultrasonic generator. The higher the temperature of the wet material, the less time was needed to produce cavitations, and the optimal temperature was 60oC . The water content in the wet material mainly a ected the quantity of cavitations. Ls-8 catalyst was prepared using ultrasonic. Its activity for conversion of SO2 reached to 52.5% at 410oC and 4.2% at 350oC. The di erential thermal analyses indicate that both endothermic peaks and exothermic peaks noticeably shifted forward compared with Ls catalyst prepared without ultrasonic, and SEM results show a uniform pore size distribution for Ls-8 catalyst.

关键词: ultrasonic, dispersion, vanadium catalyst, low temperature activity, sulfur dioxide, cavitation

Abstract: The e ect of ultrasonic cavitations on the activity of vanadium catalysts at low temperatures for the oxidation of sulfur dioxide, in which re ned carbonized mother liquor had been added, was investigated. Twenty minutes were needed to produce obvious cavitations when the catalyst raw material was treated in the 50 W ultrasonic generator. However, only 10 minutes would be needed in a 150 W ultrasonic generator. The higher the temperature of the wet material, the less time was needed to produce cavitations, and the optimal temperature was 60oC . The water content in the wet material mainly a ected the quantity of cavitations. Ls-8 catalyst was prepared using ultrasonic. Its activity for conversion of SO2 reached to 52.5% at 410oC and 4.2% at 350oC. The di erential thermal analyses indicate that both endothermic peaks and exothermic peaks noticeably shifted forward compared with Ls catalyst prepared without ultrasonic, and SEM results show a uniform pore size distribution for Ls-8 catalyst.

Key words: ultrasonic, dispersion, vanadium catalyst, low temperature activity, sulfur dioxide, cavitation