Production of Sulfite by Absorption of Sulfur Dioxide with Oxygen

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  • Shibukawa Takumi
    Division of Chemical and Materials Engineering, Graduate School of Engineering, Muroran Institute of Technology
  • Ohira Yuichi
    Division of Applied Sciences, Graduate School of Engineering, Muroran Institute of Technology
  • Obata Eiji
    Division of Applied Sciences, Graduate School of Engineering, Muroran Institute of Technology

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  • 酸素を伴う二酸化硫黄の吸収による亜硫酸イオンの生成
  • サンソ オ トモナウ ニサンカ イオウ ノ キュウシュウ ニ ヨル アリュウサン イオン ノ セイセイ

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Abstract

In order to produce sulfites from SO2 contained in flue gases, an SO2 absorption experiment was conducted using a gas mixture with oxygen that emulates industrial flue gases. Concentrations of sulfite and sulfate produced by SO2 absorption were measured, and their production ratios were assessed at a temperature of 303 K. The major product was sulfate when SO2 was absorbed at a pH of 6.5 or below 4. When the pH of the liquid absorbent was around 4, the major product was sulfite. The production ratio of sulfite can thus be controlled using the pH of the liquid absorbent.

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