Flue Gas Desulfurization by Dielectric Barrier Discharge

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• 作者：Mindi Bai ; Baiyu Leng ; Shoulei Mao ; Chaoqun Li
• 关键词：Dielectric barrier discharge ; Reactive oxygen species ; ·OH radical ; SO2 removal rate
• 刊名：Plasma Chemistry and Plasma Processing
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：36
• 期：2
• 页码：511-521
• 全文大小：688 KB
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• 作者单位：Mindi Bai (1)
  Baiyu Leng (1)
  Shoulei Mao (1)
  Chaoqun Li (1)
  
  1. Department of Physics, Dalian Maritime University, Dalian, 116026, China
  
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Mechanics
  Characterization and Evaluation Materials
  Mechanical Engineering
  Inorganic Chemistry
  Nuclear Physics, Heavy Ions and Hadrons
  
• 出版者：Springer Netherlands
• ISSN：1572-8986

文摘

There are many problems with flue gas desulfurization by traditional gas ionization discharge, including the large size of the plasma source, high energy consumption, and the need for a traditional desulfurization method. This paper introduces oxidization of SO₂ to sulfuric acid (H₂SO₄) in a duct by reactive oxygen species (O₂ +, O₃) produced by strong ionization dielectric barrier discharge. The entire plasma reaction process is completed within the duct without the use of absorbents, catalysts, or large plasma source. The reactive oxygen species O₂ + reacts with gaseous H₂O in the flue gas to generate ·OH radicals, which can oxidize trace amounts of SO₂ in large volumes of the flue gas to produce H₂SO₄. Sulfuric acid is also produced by O₃ oxidation of SO₂ to SO₃, and SO₃ reacting with gaseous H₂O in the flue gas. Experimental results showed that with a gas temperature of 22 °C and reactive oxygen species injection rate of 0.84 mg/L, the SO₂ removal rate was 81.4 %, and the SO₄ 2− concentration in the recovered liquid H₂SO₄ reached 53.8 g/L. Keywords Dielectric barrier discharge Reactive oxygen species ·OH radical SO₂ removal rate