Abstract：In 186FA single cylinder diesel engine, the polycyclic aromatic hydrocarbons (PAHs) samples before and after non-thermal plasma (NTP) were collected by glass filters and XAD-2 collectors, and the effects of NTP on PAHs emissions at various loads were analyzed combined with the gas chromatography-mass spectrometry (GC-MS). The results indicate that original emissions of PAHs with two rings and three rings increase firstly and then decrease with the increasing of load, while the trends with four rings and five rings are reversed. The removal effect of NTP on CHR is the best with the highest removal rate of 78.63%. The total emissions of PAHs are reduced evidently after NTP with the maximum removal efficiency of 37.87%. The average emissions of PAHs before and after NTP decrease with the increasing of benzene rings, and the PAHs emissions with two rings account for the largest percentage.The average emissions of PAHs with different rings are reduced after NTP with the removal rate from 17.9% to 31.0%.
2014, Vol. 35 
