• 关键词：脉冲电晕  等离子体  脱硫脱硝  化学动力学  模拟研究

• 基金项目：

• 李谦
• 广东电力试验研究所, 广州 510600

• 李劲
• 华中理工大学环境科学与工程研究中心, 武汉 430074

• 摘要：对脉冲电晕等离子体条件下烟气SO₂、NO气相氧化进行化学动力学模拟研究,结果表明,在气相反应中,SO₂主要由OH基氧化脱除,大部分氧化物转化为H2SO4;NO的氧化则涉及与多种自由基(O、OH、HO₂)及中性物种的反应；给出了SO₂、NO气相氧化对主要自由基(OH基)浓度的依赖关系,以及典型实验条件下SO₂气相净化所需的最优OH基产额；讨论了H₂O和O₂的行为和作用,及其含量对气相净化过程的影响；化学动力学研究结果为等离子体过程的优化提供了依据。

• Abstract：A kinetics of SO₂ and NO gas phase oxidizing removal from flue gas under the condition of pulsed corona plasma was investigated using simulation.The result showed that in the gas phase reaction, OH radical primarily contributed to the SO₂ removal and most oxides were turned into H₂SO₄.The NO oxidization involved reactions with many species of radicals （O, OH, HO-2 and etc.） and neutral species.The dependence of SO₂ and NO gas phase oxidization upon the concentration of the dominant free radical （i.e.OH radical）, as well as the optimal yield of OH radical essential for SO₂ gas phase purification under the typical experiment condition have been demonstrated.The behaviors and roles of H₂O and O₂, as well as the influence of their content on the SO₂ and NO gas phase purification are also discussed.

• Key words：pulsed corona  plasma  desulphurization and denitrogenation  chemical kinetics  simulating study

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