Comportamiento en un motor diesel de mezclas de destilados de ácidos grasos con combustible diesel

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Abstract

The use of industrial wastes as feedstock for biofuels production is an effective option for reduction
of fossil fuels dependence and the environmental impact these wastes generate. The behavior of
blends of fatty acid distillates and diesel fuel are in this work assessed. The fatty acid distillates are a
by-product of the vegetable oil refining industry and its blend are on a Lister Petters diesel engine
tested. First, physical tests are developed focused on density and viscosity determination. The tests
are developed on an engine test bench prepared for performance and combustion assessment. From
the obtained results, and important increase on exhaust emissions and 7% increase of specific fuel
consumption and HC and CO in 76% and 58% respectively. As part of the conclusions, the chemical
conversion is the only effective route to use this by-product for fueling diesel engines. If this
conversion is avoided, the fatty acid distillates cannot directly used on engines and only blends are a
partial solution because the pre-heating of the distillates are not enough to decrease the viscosity of
the fuel to the levels required by the standards. The best solution for the use of this by-product as a
biofuel for diesel engines is through the chemical conversion to methyl esters.