介质阻挡放电等离子体与柴油反应的实验探究

摘要

采用空气大气压介质阻挡放电(DBD)等离子体对柴油进行了处理.探究了不同的放电特性下经空气DBD等离子体处理后柴油的性质变化,其粘度升高,色泽变暗.随着放电频率以及放电间隙的增加,柴油的粘度呈现先增加后降低的趋势,色谱-质谱联用分析发现,处理后柴油样品中短链正构烷烃向长链正构烷烃转化并生成一定量的气体.实验结果表明,经等离子体处理后柴油中长链烃类发生断键,部分自由基结合生成小分子气态烃类,剩余的自由基进行重组生成更长链的烃分子.%Diesel was treated by dielectric barrier discharge (DBD) plasma with air, and the properties of treated diesel were researched under different conditions of DBD plasma. The results show the viscosity of diesel increases and color darkens. And, with the increase of pulse frequency and discharge gap, the viscosity of diesel climbs up at first and then decreases. GC-MS indicates that short-chain alkanes are transformed into long chain alkanes and some gas is produced meanwhile. All the above results demonstrate that bond cleavage of short-chain alkanes happens after diesel is treated, forming some gaseous hydrocarbons via partial free radical binding, while producing longer chains via others free radical regrouping.