Simultaneous removals of NOx, HC and PM from diesel exhaust emissions by dielectric barrier discharges.
The main target of this work is to characterize the abatements of particulate matter (PM), hydrocarbons (HC) and nitrogen oxides (NO(x)) from an actual diesel exhaust using dielectric barrier discharge technology (DBD). The effects of several parameters, such as peak voltage, frequency and engine load, on the contaminant removals have been investigated intensively. The present study shows that for a given frequency, the removals of PM and HC are enhanced with the increase of peak voltage and level off at higher voltage, while in the range of higher voltages a decline of NO(x) removal efficiency is observed. For a given voltage, the maximums of specific energy density (SED) and removal efficiency are attained at resonance point. The increase of peak voltage will result in a significant decrease of energy utilization efficiency of DBD at most engine loads. Alkanes in soluble organic fraction (SOF) are more readily subjected to removals than polycyclic aromatic hydrocarbons (PAHs).
Song
Chong-Lin
CL
State Key Laboratory of Engines, Tianjin University, Tianjin 300072, China. songchonglin@tju.edu.cn
Bin
Feng
F
Tao
Ze-Min
ZM
Li
Fang-Cheng
FC
Huang
Qi-Fei
QF
D000397:Air Pollution / Q000517:prevention & control; D000473:Alkanes / Q000302:isolation & purification; D055664:Electrochemical Techniques; D006838:Hydrocarbons / Q000302:isolation & purification*; D009589:Nitrogen Oxides / Q000302:isolation & purification*; D052638:Particulate Matter / Q000302:isolation & purification*; D011084:Polycyclic Aromatic Hydrocarbons / Q000302:isolation & purification; D001335:Vehicle Emissions
D000473:Alkanes; D006838:Hydrocarbons; D009589:Nitrogen Oxides; D052638:Particulate Matter; D011084:Polycyclic Aromatic Hydrocarbons; D001335:Vehicle Emissions