文献类型：期刊文献

英文题名：Catalytic Oxidation Removal of Sulfur Dioxide by Ozone in the Presence of Metallic Ions

作者：Nie, Mei-Yuan[1];Gu, Chao[1];Zhong, Kai-Li[1];Fang, Yun-Jin[1]

机构：[1]E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2012

卷号：26

期号：9

起止页码：5590

外文期刊名：ENERGY & FUELS

收录：;EI(收录号：20123915479057);WOS:【SCI-EXPANDED(收录号:WOS:000308856000023)】；

基金：The present work is supported by Shanghai Sanqing Environmental Protection Technology Co., Ltd.

语种：英文

外文关键词：Catalysis - Ozonization - Ozone - Sulfur dioxide - Desulfurization - Environmental technology - Catalytic oxidation - Ions - Efficiency - Flow of gases

摘要：Desulfurization of flue gas by ozonation aided by the catalysis of a metallic ion was investigated experimentally. The results showed that the removal efficiency of SO2 was only 30% at a 1:1 molar ratio of O-3/SO2 without the addition of a catalyst. However, the efficiency was substantially increased when a metallic ion was added to the absorption solution at the same ratio of O-3/SO2. In particular, the performance was optimal using a Mn2+ catalyst. Under the optimal condition given as the absorption liquid temperature of 20 degrees C, gas flow rate of 10 L/min, molar ratio of 1.0 for O-3/SO2, and Mn2+ concentration of 6.4 X 10(-4) mol/L, the removal efficiency of SO2 was 99%. A reaction mechanism of SO2 with ozone in the liquid-phase oxidation catalyzed by Mn2+ was proposed. The advantage of ozonation desulfurization technology is that SO2 is directly transformed into a valuable product, sulfuric acid, which provides favorable environmental and economic benefit.