The impact of using biodiesel/marine gas oil blends on exhaust emissions from a stationary diesel engine.
The purpose of this work was to investigate the impact of marine gas oil (MGO)/biodiesel blends on the exhaust emissions and fuel consumption in a single cylinder, stationary, diesel engine. Three different origins of biodiesel were used as the blending feedstock with the reference MGO, at proportions of 5 and 10% by volume. Methyl esters were examined according to the automotive FAME standard EN 14214. The baseline MGO and biodiesel blends were examined according to ISO 8217:2005 specifications for the DMA category. Independently of the biodiesel used, a decrease of PM, HC, CO and CO(2) emissions was observed. Emissions of NO(x) were also lower with respect to MGO. This reduction in NO(x) may be attributed to some physicochemical properties of the fuels applied, such as the higher cetane number and the lower volatility of methyl esters. Reductions in PM for biodiesel blends were lower in the exhaust than those of the reference fuel which was attributed to the oxygen content and the near absence of sulphur and aromatics compounds in biodiesel. However, a slight increase in fuel consumption was observed for the biodiesel blends that may be tolerated due to the exhaust emissions benefits. Brake thermal efficiency was also determined. Unregulated emissions were characterized by determining the soluble organic fraction content of the particulate matter.
Karavalakis
G
G
Laboratory of Fuels Technology and Lubricants, School of Chemical Engineering, National Technical University of Athens (NTUA), Athens, Greece. gkaraval@mail.ntua.gr
Tzirakis
E
E
Mattheou
L
L
Stournas
S
S
Zannikos
F
F
Karonis
D
D
D000393:Air Pollutants / Q000032:analysis; D001674:Bioelectric Energy Sources; D001335:Vehicle Emissions
D000393:Air Pollutants; D001335:Vehicle Emissions