Effect of methanol-containing additive on the emission of carbonyl compounds from a heavy-duty diesel engine.
This study was aimed at determining the effect of methanol-containing additive (MCA) on the emission of carbonyl compounds (CBCs) generated from the diesel engine. For this experiment, a heavy-duty diesel engine was connected with a full flow critical flow ventri (CFV) type dilution tunnel, a Schenck GS-350 DC dynamometer, and a DC-IV control system in series. The operating conditions of the heavy-duty diesel engine for both cold-start and hot-start Transient Cycle tests and for both low-load and high-load steady-state tests were ascertained. The exhaust of CBCs collected from a 2,4-dinitrophenylhydrazine (2,4-DNPH)-coated cartridge were first converted to corresponding hydrazone derivatives, which were then solvent-eluted and analyzed by a High Performance Liquid Chromatograph (HPLC) with an ultraviolet-visible (UV) detector. When either 10% or 15% MCA was used, the emission factors of the CBCs acrolein and isovaleraldehyde increased by at least 91%. Accordingly, future studies must be done to cut down the emission of CBCs when MCA and methanol alternative fuels are used.
Chao
H R
HR
Department of Environmental Engineering, National Cheng-Kung University, Tainan, Taiwan.
Lin
T C
TC
Chao
M R
MR
Chang
F H
FH
Huang
C I
CI
Chen
C B
CB
D000171:Acrolein / Q000032:analysis; D000447:Aldehydes / Q000032:analysis*; D002245:Carbon Dioxide / Q000032:analysis; D002851:Chromatography, High Pressure Liquid; D000431:Ethanol / Q000737:chemistry; D015386:Hazardous Substances / Q000032:analysis*; D006801:Humans; D006835:Hydrazones / Q000737:chemistry; D000432:Methanol / Q000737:chemistry*; D010659:Phenylhydrazines / Q000737:chemistry; D012997:Solvents / Q000737:chemistry*; D001335:Vehicle Emissions / Q000032:analysis*
D000447:Aldehydes; D015386:Hazardous Substances; D006835:Hydrazones; D010659:Phenylhydrazines; D012997:Solvents; D001335:Vehicle Emissions; D002245:Carbon Dioxide; C004787:2,4-dinitrophenylhydrazine; D000431:Ethanol; C032251:isovalerylaldehyde; D000171:Acrolein; D000432:Methanol