基于低温等离子体辅助催化技术的柴油机排放试验

Experiment on Harmful Emissions of Diesel Engine with Non-thermal Plasma Assisted Catalyst Technology

基于介质阻挡放电理论,设计了低温等离子体发生器,协同Na-Rh/γ-Al2O3负载型催化剂建立了低温等离子体辅助催化(NPAC)系统。通过台架试验研究了在NPAC技术作用下,柴油机有害排放的变化规律。研究结果表明:在NPAC技术作用下,柴油机碳烟颗粒排放有效降低,最高转化效率接近58%;NOx排放总量明显降低,在中低负荷时,转速3 600 r/min对应的NOx转化率比较高,最高达81.5%;在高负荷时,转速2 000 r/min对应的NOx转化率较高。

A non-thermal plasma reactor was designed based upon dielectric barrier discharge theory.The non-thermal plasma assisted catalyst system was established with a Na-Rh/γ-Al2O3 catalyst system.The experiment was carried out and the reduction of diesel engine harmful emissions had been investigated with NPAC technology.Results showed that the particulate matter was reduced effectively and the maximum of soot removal efficiency was around 58%.The NOx emission was decreased remarkably by NPAC system.Under the low load conditions,the speed of 3 600 r/min was corresponding to higher NOx conversion,and the maximum conversion was around 81.5%.Under the high load condition,the speed of 2 000 r/min showed higher NOx conversion.