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A Comparison of Ignition and Emissions Characteristics for Alternative Diesel Fuels and Emulsions
Published November 19, 1990 by Institution of Mechanical Engineers in United Kingdom
Reaction rates, ignition delays, oxides of nitrogen (NOx) and smoke emissions at different speeds and loads were measured for diesel fuel, vegetable oil and emulsions containing 10 percent by volume of water, in single-cylinder engine tests. At lower engine speed, ignition delays for vegetable-oil fuels were greater than those of the diesel fuel and its emulsion. At higher engine speed, ignition delays were shorter than at lower speed and the difference between the fuels was less; ignition delays were slightly longer for emulsions than for dry fuels with maximum rates of reaction correspondingly higher. Emulsification reduce both NOx and smoke emissions.