Abstract
The variation of carbonyl compounds in diesel exhaust at four loads before and after the treatment of Direct Non-thermal Plasma (DNTP) is studied with 2,4-dinitrophenylhydrazine (DNPH) derivatization method and high performance liquid chromatography (HPLC) analysis technique. The results show that the mass concentration of carbonyl compounds decreases firstly and then increases with the growing of diesel load before the treatment of DNTP. After the treatment of DNTP, the mass concentration of carbonyl compounds reduces remarkably. Maximum removal efficiency for total carbonyl compounds can reach 93.8% at 75% load. For acrolein, acetone, butyraldehyde and 2-butanone, removal efficiency can reach 100% at 25% load, 50% load and 100% load. At the same time, total ozone formation potential decrease dramatically.
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