Preparation and emission characteristics of ethanol-diesel fuel blends.
The preparation of ethanol-diesel fuel blends and their emission characteristics were investigated. Results showed the absolute ethanol can dissolve in diesel fuel at an arbitrary ratio and a small quantity of water(0.2%) addition can lead to the phase separation of blends. An organic additive was synthesized and it can develop the ability of resistance to water and maintain the stability of ethanol-diesel-trace amounts of water system. The emission characteristics of 10%, 20%, and 30% ethanol-diesel fuel blends, with or without additives, were compared with those of diesel fuel in a direct injection (DI) diesel engine. The experimental results indicated that the blend of ethanol with diesel fuel significantly reduced the concentrations of smoke, hydrocarbon (HC), and carbon monoxide (CO) in exhaust gas. Using 20% ethanol-diesel fuel blend with the additive of 2% of the total volume, the optimum mixing ratio was achieved, at which the bench diesel engine testing showed a significant decrease in exhaust gas. Bosch smoke number was reduced by 55%, HC emission by 70%, and CO emission by 45%, at 13 kW/1540 r/min. However, ethanol-diesel fuel blends produced a few ppm acetaldehydes and more ethanol in exhaust gas.
Zhang
Run-Duo
RD
Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
He
Hong
H
Shi
Xiao-Yan
XY
Zhang
Chang-Bin
CB
He
Bang-Quan
BQ
Wang
Jian-Xin
JX
D000079:Acetaldehyde / Q000032:analysis; D000393:Air Pollutants / Q000032:analysis*; D002248:Carbon Monoxide / Q000032:analysis; D000431:Ethanol / Q000032:analysis*; D005742:Gasoline / Q000032:analysis*; D006838:Hydrocarbons / Q000032:analysis; D009569:Nitric Oxide / Q000032:analysis; D012906:Smoke / Q000032:analysis; D001335:Vehicle Emissions; D014867:Water / Q000737:chemistry
D000393:Air Pollutants; D005742:Gasoline; D006838:Hydrocarbons; D012906:Smoke; D001335:Vehicle Emissions; D014867:Water; D009569:Nitric Oxide; D000431:Ethanol; D002248:Carbon Monoxide; D000079:Acetaldehyde