低温等离子体处理柴油机有害排放试验  

Experiment on treating harmful emissions by non-thermal plasma in diesel exhaust

作　　者：吴江霞[1] 蔡忆昔[1] 赵卫东[1] 李小华[1] 王军[1] 

机构地区：[1]江苏大学汽车与交通工程学院,江苏镇江212013

出　　处：《江苏大学学报（自然科学版）》2006年第3期225-228,共4页Journal of Jiangsu University：Natural Science Edition

基　　金：国家自然科学基金资助项目(50276025);江苏省第二批青蓝工程学术带头人专项基金资助项目(苏教师〔2002〕60号文)

摘　　要：根据低温等离子体的产生原理和柴油机有害排放物的生成特点,设计了结构和功能具有实用性的等离子体反应器;通过静态试验研究了介质阻挡放电的放电特性及其影响因素,探讨了低温等离子体的化学反应机理;通过柴油机台架试验对低温等离子体处理柴油机排气中的碳烟和NOx进行了研究.结果表明,选用介电常数较大、厚度较薄的介质材料以及合适的放电间隙容易产生强烈的放电,低温等离子体对碳烟具有较高的去除率,亦可有效减少NO,而NOx总量基本不变.排气在等离子体反应区内的有效滞留时间是影响转化效率的重要因素.Based on the mechanism of non-thermal plasma generation and the characteristic of harmful emissions in diesel exhaust, a practical plasma genetator was designed to reduce harmful emissions. The characteristic of dielectric barrier discharge and its influencing factors were studied through static experiment, and chemical change about NOx and carbon soot through non-thermal plasma were discussed. The experiment was conducted in diesel to study the effect of non-thermal plasma treating carbon soot and NOx. The results show that by selecting proper discharge gap and material with large dielectric constant and small thickness, strong discharge can occur. It shows high removal efficiency to treat carbon soot, and to reduce NO. However, the total amount of NOx has little change. The residence time that exhaust stays in discharge area is an important factor in influencing removal efficiency.

关 键 词：柴油机 低温等离子体 介质阻挡放电 排放 静态试验 

分 类 号：TK421.5[动力工程及工程热物理—动力机械及工程]