Removal and Resource Utilization of High Concentration Flue Gas Sulfur Dioxide Using Manganese Carbonate Ore
The removal of high concentration flue gas sulfur dioxide (SO<sub>2</sub>) using manganese carbonate ore desulfurization (MCO-FGD) is a promising route that combines economic benefits and pollution control. However, the problems of intermediate oxidation and by-product control have plagu...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-05-01
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| Series: | Atmosphere |
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| Online Access: | https://www.mdpi.com/2073-4433/14/5/835 |
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| author | Zhaotong Tang Yuchen Wang Jie Liu Bo Xu Lin Ding Wenfeng Huang Zhongde Dai Wenju Jiang Lu Yao Lin Yang |
| author_facet | Zhaotong Tang Yuchen Wang Jie Liu Bo Xu Lin Ding Wenfeng Huang Zhongde Dai Wenju Jiang Lu Yao Lin Yang |
| author_sort | Zhaotong Tang |
| collection | DOAJ |
| description | The removal of high concentration flue gas sulfur dioxide (SO<sub>2</sub>) using manganese carbonate ore desulfurization (MCO-FGD) is a promising route that combines economic benefits and pollution control. However, the problems of intermediate oxidation and by-product control have plagued the industrial application of the MCO-FGD technique for a long time. Based on the fact that there is symbiosis of manganese and iron in natural manganese ore, in this study, small amounts of Fe(III) and MnO<sub>2</sub> were introduced into the MCO-FGD reaction system to enhance the oxidation of SO<sub>2</sub> to SO<sub>4</sub><sup>−</sup> and suppress the manganous dithionate (MnS<sub>2</sub>O<sub>6</sub>) by-product generation. The results suggested that the addition of Fe(III) led to the generation of potent oxidant Mn(III) in the reaction system, which accelerated the generation of SO<sub>3</sub><sup>−•</sup> radicals and, thus, enhanced the oxidation of SO<sub>2</sub>. Under the optimum reaction conditions, the 2.0% of inlet SO<sub>2</sub> could be removed to 62 ppm, obtaining 90.1% manganese leaching efficiency, and the concentration of MnS<sub>2</sub>O<sub>6</sub> in the desulfurized liquid was kept below 2.5 g/L after a six-stage desulfurization. The results are of great importance for the sustainable development of the manganese metallurgical industry, which provides theoretical and technical support for the recycling of sulfur and manganese. The influences of different operational conditions on SO<sub>2</sub> removal, the catalytic mechanism, and manganese leaching were studied to provide theoretical and technical support for resourceful MCO-FGD technology. |
| first_indexed | 2024-03-11T03:58:14Z |
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| id | doaj.art-fc6cf2a89f4845f7b4ab43601e5b9964 |
| institution | Directory Open Access Journal |
| issn | 2073-4433 |
| language | English |
| last_indexed | 2024-03-11T03:58:14Z |
| publishDate | 2023-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Atmosphere |
| spelling | doaj.art-fc6cf2a89f4845f7b4ab43601e5b99642023-11-18T00:25:32ZengMDPI AGAtmosphere2073-44332023-05-0114583510.3390/atmos14050835Removal and Resource Utilization of High Concentration Flue Gas Sulfur Dioxide Using Manganese Carbonate OreZhaotong Tang0Yuchen Wang1Jie Liu2Bo Xu3Lin Ding4Wenfeng Huang5Zhongde Dai6Wenju Jiang7Lu Yao8Lin Yang9College of Carbon Neutrality Future Technology, Sichuan University, Chengdu 610065, ChinaCollege of Carbon Neutrality Future Technology, Sichuan University, Chengdu 610065, ChinaCollege of Carbon Neutrality Future Technology, Sichuan University, Chengdu 610065, ChinaCollege of Carbon Neutrality Future Technology, Sichuan University, Chengdu 610065, ChinaCollege of Carbon Neutrality Future Technology, Sichuan University, Chengdu 610065, ChinaCollege of Carbon Neutrality Future Technology, Sichuan University, Chengdu 610065, ChinaCollege of Carbon Neutrality Future Technology, Sichuan University, Chengdu 610065, ChinaCollege of Carbon Neutrality Future Technology, Sichuan University, Chengdu 610065, ChinaCollege of Carbon Neutrality Future Technology, Sichuan University, Chengdu 610065, ChinaCollege of Carbon Neutrality Future Technology, Sichuan University, Chengdu 610065, ChinaThe removal of high concentration flue gas sulfur dioxide (SO<sub>2</sub>) using manganese carbonate ore desulfurization (MCO-FGD) is a promising route that combines economic benefits and pollution control. However, the problems of intermediate oxidation and by-product control have plagued the industrial application of the MCO-FGD technique for a long time. Based on the fact that there is symbiosis of manganese and iron in natural manganese ore, in this study, small amounts of Fe(III) and MnO<sub>2</sub> were introduced into the MCO-FGD reaction system to enhance the oxidation of SO<sub>2</sub> to SO<sub>4</sub><sup>−</sup> and suppress the manganous dithionate (MnS<sub>2</sub>O<sub>6</sub>) by-product generation. The results suggested that the addition of Fe(III) led to the generation of potent oxidant Mn(III) in the reaction system, which accelerated the generation of SO<sub>3</sub><sup>−•</sup> radicals and, thus, enhanced the oxidation of SO<sub>2</sub>. Under the optimum reaction conditions, the 2.0% of inlet SO<sub>2</sub> could be removed to 62 ppm, obtaining 90.1% manganese leaching efficiency, and the concentration of MnS<sub>2</sub>O<sub>6</sub> in the desulfurized liquid was kept below 2.5 g/L after a six-stage desulfurization. The results are of great importance for the sustainable development of the manganese metallurgical industry, which provides theoretical and technical support for the recycling of sulfur and manganese. The influences of different operational conditions on SO<sub>2</sub> removal, the catalytic mechanism, and manganese leaching were studied to provide theoretical and technical support for resourceful MCO-FGD technology.https://www.mdpi.com/2073-4433/14/5/835flue gas desulfurizationmanganese carbonate orehigh concentration SO<sub>2</sub>resource utilization |
| spellingShingle | Zhaotong Tang Yuchen Wang Jie Liu Bo Xu Lin Ding Wenfeng Huang Zhongde Dai Wenju Jiang Lu Yao Lin Yang Removal and Resource Utilization of High Concentration Flue Gas Sulfur Dioxide Using Manganese Carbonate Ore Atmosphere flue gas desulfurization manganese carbonate ore high concentration SO<sub>2</sub> resource utilization |
| title | Removal and Resource Utilization of High Concentration Flue Gas Sulfur Dioxide Using Manganese Carbonate Ore |
| title_full | Removal and Resource Utilization of High Concentration Flue Gas Sulfur Dioxide Using Manganese Carbonate Ore |
| title_fullStr | Removal and Resource Utilization of High Concentration Flue Gas Sulfur Dioxide Using Manganese Carbonate Ore |
| title_full_unstemmed | Removal and Resource Utilization of High Concentration Flue Gas Sulfur Dioxide Using Manganese Carbonate Ore |
| title_short | Removal and Resource Utilization of High Concentration Flue Gas Sulfur Dioxide Using Manganese Carbonate Ore |
| title_sort | removal and resource utilization of high concentration flue gas sulfur dioxide using manganese carbonate ore |
| topic | flue gas desulfurization manganese carbonate ore high concentration SO<sub>2</sub> resource utilization |
| url | https://www.mdpi.com/2073-4433/14/5/835 |
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