Simultaneous removal of COS, H₂S, and dust by means of DC corona discharge plasma was investigated in a plasma reactor. The results showed that the DC corona discharge was effective in removing COS, H₂S, and dust simultaneously. As the content of O₂ increased, the conversion of COS and H₂S decreased. O₃ was produced at high O₂ content, resulting in more energy being shared. Higher temperature is not conducive to the conversion of COS and H₂S. Dust could react with gaseous pollutant or serve as a carrier under the electric field. The conversion of COS and H₂S and yield of CO₂ were slightly improved after the dust was introduced. In contrast, a significant decrease of the yield of SO₂ and CO was observed. Meanwhile, the removal efficiency of dust reached 99%. In a plasma reactor, the chemical bonds of COS and H₂S were broken and then further oxidized to sulfur-containing and carbon-containing products caused by free electrons, oxygen radicals, and ozone. The CO and CO₂ products were generated from the COS, and sulfur compounds (S, SO₂, and SO₄^2–) were a result of the oxidation of COS and H₂S. Free electrons and oxidative radicals might play more significant roles in the conversion of COS and H₂S.

中文翻译：

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直流电晕放电等离子体同时去除工业废气中的COS，H ₂ S和灰尘

在等离子体反应器中研究了通过直流电晕放电等离子体同时去除COS，H ₂ S和灰尘的方法。结果表明，直流电晕放电可以有效地同时去除COS，H ₂ S和灰尘。随着O ₂含量的增加，COS和H ₂ S的转化率降低。以高O ₂含量产生O ₃，导致更多的能量被共享。较高的温度不利于COS和H ₂ S的转化。粉尘可能会与气态污染物发生反应或在电场下充当载体。COS和H ₂ S的转化率及CO _2的收率引入粉尘后略有改善。相反，观察到SO ₂和CO的产率显着降低。同时，除尘效率达到99％。在等离子体反应器中，COS和H ₂ S的化学键断裂，然后进一步氧化成由自由电子，氧自由基和臭氧引起的含硫和含碳产物。CO和CO ₂产物是由COS产生的，而硫化合物（S，SO ₂和SO ₄ ^{2 –}）是COS和H ₂ S氧化的结果。自由电子和氧化自由基可能起更重要的作用在COS和H ₂ S的转化中。