To improve the pollutant removal efficiency by non-thermal plasma (NTP), the effect of H₂O vapor and O₂ on removal efficiency of NO and SO₂ as well as the reduction of CO was investigated in H₂O/O₂/SO₂/NO/C₃H₆/CO₂/N₂ system. To analyse the reaction mechanism, the effects of H₂O vapor and O₂ on the emission intensity of $\mathbf{O}(3{\mathbf{p}}^5\mathbf{P}\to 3{\mathbf{s}}^5{\mathit{S}}_2^0)$ and $\mathbf{O}\mathbf{H}({\mathit{A}}^2{{\displaystyle \sum }}^{+}\to {\mathbf{X}}^2{\displaystyle \prod })$ were investigated. The experimental results show that the increase of H₂O 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 SO₂ removal efficiency from 4.8% to 35.3%, decreases the energy per SO₂ removed decreases from 2784.0 to 582.9 eV/SO₂, and reduces the generation of CO from 460 to 229 ppm. In the range of 0%–15%, the increase of O₂ 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 O₂ content promotes SO₂ removal efficiency from 8.7% to 24.8%, and decreases the energy per SO₂ removed from 2485.7 to 876.6 eV/SO₂. However, CO generation increases from 200 to 350 ppm with the increase of O₂ in 0%–5% due to the incomplete oxidation of C₃H₆. In the range of 5%–15%, the increase of O₂ produces more O radicals, decreases the removal efficiency of SO₂ 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.

中文翻译：

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非热等离子体对船用柴油机尾气脱硫脱硝影响的H2O蒸气和O2实验研究

为提高非热等离子体（NTP）的污染物去除效率，研究了H ₂ O蒸汽和O ₂对NO和SO ₂去除效率以及CO还原的影响 H ₂ O/O ₂ / SO ₂ /NO/C ₃ H ₆ /CO ₂ /N ₂体系。为了分析反应机理，H ₂ O 蒸气和O ₂对发光强度的影响$\mathbf{○}(3{\mathbf{p}}^5\mathbf{磷}\to 3{\mathbf{s}}^5{\mathit{小号}}_2^0)$和$\mathbf{○}\mathbf{H}({\mathit{一个}}^2{{\displaystyle \sum }}^{+}\to {\mathbf{X}}^2{\displaystyle \prod })$进行了调查。实验结果表明，H ₂ O 蒸气（0%~9.8%）的增加促进了 OH 自由基的产生，NO 的去除效率从 18.9% 提高到 57.3%，每 NO 去除的能量从 449.0 降低到 148.1 eV /NO，将 SO ₂去除效率从 4.8% 提高到 35.3%，将每 SO ₂去除的能量从 2784.0 降低到 582.9 eV/SO ₂，并将 CO 的产生从 460 ppm 降低到 229 ppm。在0%~15%范围内，O ₂含量的增加促进了O自由基的形成，NO的去除效率从8.5%提高到54.2%，单位NO的去除能量从994.3降低到156.4 eV/NO . 在0%~5%的范围内，增加O ₂含量将 SO ₂去除效率从 8.7% 提高到 24.8%，并将每 SO ₂去除的能量从 2485.7 降低到 876.6 eV/SO ₂。_{然而，由于C 3} H ₆的不完全氧化，随着O ₂在0%~5%的增加，CO 的产生量从200 ppm 增加到350 ppm 。在5%~15%的范围内，O _{2的增加产生更多的O自由基，使SO 2}的去除效率从24.8%降低到23.5%，CO的生成量从350 ppm降低到311 ppm。本研究有助于提高NTP脱硫脱硝效率，同时减少副产物CO。