介质阻挡放电分解正癸烷

Decomposition of n-Decane with Dielectric Barrier Discharges

挥发性有机化合物（VOCs）是引起雾霾天气的主要物质之一。采用常压介质阻挡放电对正癸烷的分解进行了研究，探讨了正癸烷在不同能量密度下转化率、产物生成情况及正癸烷的分解机理。研究结果表明：随着能量密度增加，正癸烷转化率逐步增加，当能量密度为225J·L^-1时，正癸烷转化率高达80％。正癸烷分解总的碳平衡达到了90％，CO和CO2的选择性为74％，n-癸酮的选择性为15％。颗粒物产物的直径分布范围为50-200nm，浓度范围为10^3～10^6个·cm^-3。

Volatile organic compounds （VOCs） are major chemicals causing haze. The decomposition of n-decane （as a model VOCs） was studied using atmospheric dielectric barrier discharges. The influence of energy density on n-decane conversion, particle products and decomposition mechanism were investigated. It is found that the conversion rate increases gradually with the increase of energy density, n-Decane conversion rate was 80% at an energy density of 225 J.L^-1. The total carbon balance is around 90% and the selectivity of CO/CO2 and n-decanones are 74% and 15%, respectively. The particles from n-decane decomposition are within a diameter range of 50-200 nm and a concentration range of 10^3-10^6 cm^-3.