[Preparation of ethanol-diesel fuel blends and exhausts emission characteristics in diesel engine].
The technology that diesel oil is partly substituted by ethanol can reduce diesel engine exhausts emission, especially fuel soot. This research is concentrated on preparation of ethanol-diesel blend fuel and exhausts emission characteristics using diesel engine bench. Absolute ethanol can dissolve into diesel fuel at an arbitrary ratio. However, a trace of water (0.2%) addition can lead to the phase separation of blends. Organic additive synthesized during this research can develop the ability of resistance to water and maintain the stability of ethanol-diesel-trace amounts of water system. The effects of 10%, 20%, and 30% ethanol-diesel fuel blends on exhausts emission, were compared with that of diesel fuel in direct injection (DI) diesel engine. The optimum ethanol percentage for ethanol-diesel fuel blends was 20%. Using 20% ethanol-diesel fuel blend with 2% additive of the total volume, bench diesel engine showed a large amount decrease of exhaust gas, e.g. 55% of Bosch smoke number, 70% of HC emission, and 45% of CO emission at 13 kW and 1540 r/min. Without the addition of additive, the blend of ethanol produced new organic compounds such as ethanol and acetaldehyde in tail gas. However, the addition of additive obviously reduced the emission of ethanol and acetaldehyde.
Zhang
Runduo
R
Department of Air Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
He
Hong
H
Zhang
Changbin
C
Shi
Xiaoyan
X
D000447:Aldehydes / Q000032:analysis; D002248:Carbon Monoxide / Q000032:analysis; D000431:Ethanol / Q000032:analysis; D008401:Gas Chromatography-Mass Spectrometry; D005742:Gasoline; D001335:Vehicle Emissions; D014783:Viscosity
D000447:Aldehydes; D005742:Gasoline; D001335:Vehicle Emissions; D000431:Ethanol; D002248:Carbon Monoxide