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The Kinetics of Oxidation Inhibition of Magnesium Sulfite in the Wet Flue Gas Desulphurization Process

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Using a stirred bubbling reactor, the kinetics of oxidation inhibition of MgSO3 from a magnesium-based wet flue gas desulphurization process were investigated. The reaction was found to be 0.7 order with respect to magnesium sulfite and −0.3 order with respect to sodium thiosulfate. The pH value should be controlled at a lower level in order to hamper the oxidation of sulfite. The apparent activation energy of the reaction was calculated to be 8.68 kJ/mol and a kinetic model has been established. Pilot tests showed that sodium thiosulfate can effectively inhibit the oxidation of magnesium sulfite in the magnesium-based wet flue gas desulphurization process.
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Keywords: kinetics; magnesium sulfite; oxidation inhibition; sodium thiosulfate; wet flue gas desulphurization

Document Type: Research Article

Affiliations: College of Resource and Environmental Engineering, East China University of Science and Technology, Shanghai, China

Publication date: October 18, 2013

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