Experimental study on the influence of H 2 O vapor and O 2 for desulfurization and denitrification of the diesel exhaust in marine application by non-thermal plasma

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article

Yunkai Cai¹  Lin Lv¹  Xinpei Lu² 

[1] School of Energy and Power Engineering, Wuhan University of Technology;State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology

关键词: air pollution control;    carbon compounds;    flue gas desulphurisation;    gas mixtures;    hydrogen compounds;    marine pollution;    nitrogen;    organic compounds;    oxidation;    oxygen;    oxygen compounds;    plasma diagnostics;    sulphur compounds;    water pollution control;   

DOI  :  10.1049/hve2.12069

学科分类：物理（综合）

来源: Wiley

【 摘 要 】

To improve the pollutant removal efficiency by non-thermal plasma (NTP), the effect of H 2 O vapor and O 2 on removal efficiency of NO and SO 2 as well as the reduction of CO was investigated in H 2 O/O 2 /SO 2 /NO/C 3 H 6 /CO 2 /N 2 system. To analyse the reaction mechanism, the effects of H 2 O vapor and O 2 on the emission intensity of ◂f()▸ O ⁡ ◂()▸ ( 3 ⁢ p 5 ⁢ P → ◂⋅▸ 3 ⁢ s 5 ⁢ S 2 0 ) and O ⁢ ◂f()▸ H ⁡ ◂()▸ ( ◂⋅▸ A 2 ⁢ ∑ + → X 2 ⁢ ∏ ) were investigated. The experimental results show that the increase of H 2 O vapour (0%–9.8%) promotes the generation of OH radicals, increases the removal efficiency of NO from 18.9% to 57.3%, decreases the energy per NO removed from 449.0 to 148.1 eV/NO, increases SO 2 removal efficiency from 4.8% to 35.3%, decreases the energy per SO 2 removed decreases from 2784.0 to 582.9 eV/SO 2 , and reduces the generation of CO from 460 to 229 ppm. In the range of 0%–15%, the increase of O 2 content promotes the formation of O radicals, increases the removal efficiency of NO from 8.5% to 54.2%, and decreases the energy per NO removed from 994.3 to 156.4 eV/NO. In the range of 0%–5%, increasing O 2 content promotes SO 2 removal efficiency from 8.7% to 24.8%, and decreases the energy per SO 2 removed from 2485.7 to 876.6 eV/SO 2 . However, CO generation increases from 200 to 350 ppm with the increase of O 2 in 0%–5% due to the incomplete oxidation of C 3 H 6 . In the range of 5%–15%, the increase of O 2 produces more O radicals, decreases the removal efficiency of SO 2 from 24.8% to 23.5% and the generates of CO from 350 to 311 ppm. This study is helpful for improving the efficiency of NTP for desulfurization and denitrification, while reducing the by-product CO.

【 授权许可】

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