中文摘要：

采用介质阻挡放电对模拟废气中萘的降解进行了研究,深入分析了放电特性和萘的降解特性.研究结果表明：介质阻挡放电过程产生了90 ns脉宽的脉冲电流.放电电压的增加提高了能量密度,从而促进了萘的降解.在7 kV的放电电压下,能量密度达到了236.4 J·L-1,此时萘的降解效率为94.1％.而随着放电电压的增加,萘的降解产物COx的选择率却有所下降.在相同的能量密度下,低放电频率、窄放电气隙有助于萘的降解.介质阻挡放电过程中仅产生6μL·L-1左右的NOx,而生成了500μL·L-1以上的O3.另外,萘的降解过程还产生了萘醌、脂肪族化合物和短链烃等副产物,这表明氧自由基在萘的降解过程中起到了重要的作用.

英文摘要：

The destruction of naphthalene was investigated using a dielectric barrier discharge （DBD） system. The study results show that discharge current pulse can be generated with 90 ns pulse width. The energy density increases with the increase of discharge voltage, which promotes naphthalene destruction. The naphthalene destruction efficiency is 94.1% while the energy density reaches to 236.4 J.L-1 at 7 kV. However, the COx selectivity presents a decreasing trend with the increase of discharge voltage. Low discharge frequency and narrow discharge gap contribute to naphthalene destruction under the same energy density. There is only about 6 μL.L-1 NOx and over 500μL-L-1 O3 generated during DBD. In addition, part of naphthalene is converted to naphthoquinone, aliphatic compound and short-chain hydrocarbons because of incomplete oxidization reactions, which indicates O radicals play a key role during the naphthalene destruction.