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Study on the removal of SO2 and NO from marine diesel engine exhaust by composite redox system
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Hongyuan Xi, Taiyu You, Daifangzhe Li, Zhaoshan Huang, Song Zhou
Transactions of CSICE | 2025, 43(4) : 340 - 348
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Transactions of CSICE | 2025, 43(4): 340-348
Study on the removal of SO2 and NO from marine diesel engine exhaust by composite redox system
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Hongyuan Xi, Taiyu You, Daifangzhe Li, Zhaoshan Huang, Song Zhou
Affiliations
  • College of Power and Energy Engineering，Harbin Engineering University，Harbin 150001，China
Published: 2025-07-25 doi: 10.16236/j.cnki.nrjxb.202504039
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A sodium persulfate(Na2S2O8)/urea composite redox removal system using seawater as the solvent was constructed, and a bubbling reactor was constructed. A bubble reactor was used to carry out experimental research on the removal of SO2 and NO from marine diesel engine exhaust under different Cl- mole concentrations(0—0.6mol/L), HCO3- mole concentrations(0—0.05mol/L), reaction temperatures(30—70℃), Na2S2O8 mole concentrations(0.01—0.20mol/L), and urea mole concentrations(0.1—2.0mol/L). The results show that the presence of Cl- and HCO3- can effectively strengthen the absorption of NO, the increase of the reaction temperature, Na2S2O8 mole concentration, and urea mole concentration can effectively promote the removal of NO, the use of seawater and urea can reduce the competitive role of SO2 and improve the NO removal efficiency, the increase of the initial volume fraction of NO can inhibit the absorption of NO. The addition of urea can effectively inhibit the generation of nitrate in the solution, and the urea mole concentration of 2.0mol/L can increase the nitrate mass concentration from 25.687mg/L to 15.158mg/L. The Na2S2O8/urea/seawater composite redox removal system not only has a good NO removal ability, but also effectively solves the problem of high nitrate content in washing wastewater.

marine diesel engine  /  sodium persulfate  /  urea  /  composite redox removal system
席鸿远, 游泰宇, 李戴方哲, 黄照珊, 周松. 复合氧化还原体系协同脱除船舶柴油机SO2和NO的研究. 内燃机学报, 2025 , 43 (4) : 340 -348 . DOI: 10.16236/j.cnki.nrjxb.202504039
Hongyuan Xi, Taiyu You, Daifangzhe Li, Zhaoshan Huang, Song Zhou. Study on the removal of SO2 and NO from marine diesel engine exhaust by composite redox system[J]. Transactions of CSICE, 2025 , 43 (4) : 340 -348 . DOI: 10.16236/j.cnki.nrjxb.202504039
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doi: 10.16236/j.cnki.nrjxb.202504039
  • Receive Date：2025-01-13
  • Online Date：2026-11-06
  • Published：2025-07-25
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  • Received：2025-01-13
  • Revised：2025-04-25
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    College of Power and Energy Engineering，Harbin Engineering University，Harbin 150001，China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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