Preparation and SO2 capture kinetics of a DeSOx coating for the desulfurization of exhaust emission
Sulfur dioxide (SO2) is an extremely harmful pollutant in diesel engine exhaust fumes, which must be controlled and removed effectively. In order to better integrate desulfurization materials into diesel exhaust systems, a new desulfurization powder coating (DeSOx coating) was prepared. The SO2 capt...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-11-01
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| Series: | Heliyon |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2405844022027517 |
| _version_ | 1811190907990441984 |
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| author | Xing Li Taoli Huhe Tao Zeng Xiang Ling Zhenpeng Wang Hongyu Huang Yong Chen |
| author_facet | Xing Li Taoli Huhe Tao Zeng Xiang Ling Zhenpeng Wang Hongyu Huang Yong Chen |
| author_sort | Xing Li |
| collection | DOAJ |
| description | Sulfur dioxide (SO2) is an extremely harmful pollutant in diesel engine exhaust fumes, which must be controlled and removed effectively. In order to better integrate desulfurization materials into diesel exhaust systems, a new desulfurization powder coating (DeSOx coating) was prepared. The SO2 capture performance and kinetics of the DeSOx coating were subsequently studied. This study used a fixed-bed reactor to test the DeSOx coating SO2 capture performance and conduct kinetic analysis at various temperatures and gas flows. The analysis obtained the kinetic parameters of the activation energy and Arrhenius constant, with the derived rate control equations, under isothermal conditions. The DeSOx coating and filter which were prepared using metal oxide powders, SiO2 colloidal sol, and additives, exhibited an enhanced SO2 capture performance. In this experiment, an MnO2/SiO2/LiOH coating had the best SO2 removal rate and capture capacity at 400 °C. Under a reaction space velocity of 10700 h−1, the MnO2/SiO2/LiOH coating SO2 removal rate was 100% within the first hour of reaction. Under a reaction space velocity of 32000 h−1, the MnO2/SiO2/LiOH coating SO2 capture capacity was 132.7 mgSO2/gmaterial during the second hour of reaction. The SO2 capture conversion rate of the DeSOx coating and filter follows the second-order kinetic mechanism model. For the MnO2/SiO2/LiOH coating, the Arrhenius equation gives an activation energy of 4952 J/mol and the Arrhenius natural logarithmic constant is 8.969 s−1. For the MnO2/SiO2/LiOH filter, the activation energy of the rate constant is 214 J/mol, and the Arrhenius natural logarithmic constant is 3.744 s−1. Therefore, the desulfurization coating is an effective way to remove SO2 pollutants from diesel exhaust gases. |
| first_indexed | 2024-04-11T14:58:11Z |
| format | Article |
| id | doaj.art-53eb2b5cfda34092aad02ac518db171e |
| institution | Directory Open Access Journal |
| issn | 2405-8440 |
| language | English |
| last_indexed | 2024-04-11T14:58:11Z |
| publishDate | 2022-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Heliyon |
| spelling | doaj.art-53eb2b5cfda34092aad02ac518db171e2022-12-22T04:17:05ZengElsevierHeliyon2405-84402022-11-01811e11463Preparation and SO2 capture kinetics of a DeSOx coating for the desulfurization of exhaust emissionXing Li0Taoli Huhe1Tao Zeng2Xiang Ling3Zhenpeng Wang4Hongyu Huang5Yong Chen6School of Mechanical and Power Engineering, Nanjing Tech University, Nanjing 211800, China; Chinese Academy of Science, Guangzhou Institute of Energy Conversion, Guangzhou 510640, China; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 511458, ChinaSchool of Mechanical and Power Engineering, Nanjing Tech University, Nanjing 211800, China; Institute of Urban and Rural Mining, Changzhou University, Changzhou 213164, ChinaChinese Academy of Science, Guangzhou Institute of Energy Conversion, Guangzhou 510640, China; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 511458, ChinaSchool of Mechanical and Power Engineering, Nanjing Tech University, Nanjing 211800, ChinaChinese Academy of Science, Guangzhou Institute of Energy Conversion, Guangzhou 510640, China; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 511458, ChinaChinese Academy of Science, Guangzhou Institute of Energy Conversion, Guangzhou 510640, China; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 511458, China; Corresponding author.School of Mechanical and Power Engineering, Nanjing Tech University, Nanjing 211800, China; Chinese Academy of Science, Guangzhou Institute of Energy Conversion, Guangzhou 510640, ChinaSulfur dioxide (SO2) is an extremely harmful pollutant in diesel engine exhaust fumes, which must be controlled and removed effectively. In order to better integrate desulfurization materials into diesel exhaust systems, a new desulfurization powder coating (DeSOx coating) was prepared. The SO2 capture performance and kinetics of the DeSOx coating were subsequently studied. This study used a fixed-bed reactor to test the DeSOx coating SO2 capture performance and conduct kinetic analysis at various temperatures and gas flows. The analysis obtained the kinetic parameters of the activation energy and Arrhenius constant, with the derived rate control equations, under isothermal conditions. The DeSOx coating and filter which were prepared using metal oxide powders, SiO2 colloidal sol, and additives, exhibited an enhanced SO2 capture performance. In this experiment, an MnO2/SiO2/LiOH coating had the best SO2 removal rate and capture capacity at 400 °C. Under a reaction space velocity of 10700 h−1, the MnO2/SiO2/LiOH coating SO2 removal rate was 100% within the first hour of reaction. Under a reaction space velocity of 32000 h−1, the MnO2/SiO2/LiOH coating SO2 capture capacity was 132.7 mgSO2/gmaterial during the second hour of reaction. The SO2 capture conversion rate of the DeSOx coating and filter follows the second-order kinetic mechanism model. For the MnO2/SiO2/LiOH coating, the Arrhenius equation gives an activation energy of 4952 J/mol and the Arrhenius natural logarithmic constant is 8.969 s−1. For the MnO2/SiO2/LiOH filter, the activation energy of the rate constant is 214 J/mol, and the Arrhenius natural logarithmic constant is 3.744 s−1. Therefore, the desulfurization coating is an effective way to remove SO2 pollutants from diesel exhaust gases.http://www.sciencedirect.com/science/article/pii/S2405844022027517Sulfur dioxide captureExhaust desulfurizationDesulfurization coatingKinetic analysis |
| spellingShingle | Xing Li Taoli Huhe Tao Zeng Xiang Ling Zhenpeng Wang Hongyu Huang Yong Chen Preparation and SO2 capture kinetics of a DeSOx coating for the desulfurization of exhaust emission Heliyon Sulfur dioxide capture Exhaust desulfurization Desulfurization coating Kinetic analysis |
| title | Preparation and SO2 capture kinetics of a DeSOx coating for the desulfurization of exhaust emission |
| title_full | Preparation and SO2 capture kinetics of a DeSOx coating for the desulfurization of exhaust emission |
| title_fullStr | Preparation and SO2 capture kinetics of a DeSOx coating for the desulfurization of exhaust emission |
| title_full_unstemmed | Preparation and SO2 capture kinetics of a DeSOx coating for the desulfurization of exhaust emission |
| title_short | Preparation and SO2 capture kinetics of a DeSOx coating for the desulfurization of exhaust emission |
| title_sort | preparation and so2 capture kinetics of a desox coating for the desulfurization of exhaust emission |
| topic | Sulfur dioxide capture Exhaust desulfurization Desulfurization coating Kinetic analysis |
| url | http://www.sciencedirect.com/science/article/pii/S2405844022027517 |
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