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| Mechanism analysis on double liquid phase desulfurization for industrial silicon smelting flue gas |
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Received:April 29, 2020
Revised:May 25, 2020
Accepted:May 29, 2020
Published Online:February 08, 2021
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| DOI： |
| KeyWord:Smelting flue gas; Sulfur dioxide; Organic phase absorption; Organic phase catalytic oxidation |
| Author | Institution |
| Xiao Qingchao |
Kunming Youdu Environmental Monitoring Limited Company |
| Song Xin |
Faculty of Environmental Science and Engineering,Kunming University of Science and Technology |
| Jia Lijuan |
School of Chemistry and Environment,Yunnan Minzu University |
| Li Kai |
Faculty of Environmental Science and Engineering,Kunming University of Science and Technology |
| Qu Guangfei |
Faculty of Environmental Science and Engineering,Kunming University of Science and Technology |
| Sun Lina |
Faculty of Environmental Science and Engineering,Kunming University of Science and Technology |
| Ning Ping |
Faculty of Environmental Science and Engineering,Kunming University of Science and Technology |
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| Abstract: |
| In this paper, the reaction mechanism on double liquid phase desulfurization for industrial silicon smelting flue gas was analyzed by density functional theory. The results showed that O2 and SO2 were mainly distributed in the water phase. H2SO3 was mainly distributed in the organic phase. SO2 was firstly absorbed into H2SO3 by water phase. Then, H2SO3 and O2 entered the organic phase membrane through the liquid membrane of two liquid phases between organic phase and water phase. On the surface of organic phase, H2SO3 reacted with O2, and H2SO3 was oxidized to H2SO4. As the solubility of H2SO4 in water was greater than that in organic phase, H2SO4 was transferred from organic phase to water phase. This process reduced the concentration of H2SO3 in water, and made the absorption of SO2 by water continue through organic phase catalytic oxidation. The double liquid phase system can play a role in the separation and catalytic enhancement of sulfur-containing components. |
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