Avaliação de Desempenho, Emissões e Distribuição de Tamanho de Partículas em um Motor Diesel com Uso de Aditivo Otimizador de Performance

Abstract

Emissions from the exhaust gases of a diesel engine contain a large number of nanoparticles that are harmful to human health and the environment. The use of fuel optimizers, i.e. fuel additives, potentially reduce emissions, particulate matter (PM), and improve combustion characteristics. In this study, the engine-out exhaust emissions, fuel consumption and particle size distribution emitted from a diesel engine were evaluated using a mixture of 11% biodiesel and 89% mineral diesel (named B11), containing 10 ppm of sulfur; a second blend with an optimizer (called B11x) and a third fuel of 100% mineral diesel (named B0). The engine was kept at a constant load of 15 N.m at a speed of 1700 rpm (BMEP of 0.23 MPa) coupled with a dynamometer. A mobility nanoparticle spectrometer was used, as well as a gas analyzer and a dilution system type CVS (Constant Volume Sampling), which has been used to dilute the exhaust gas to collect the PM. In general, the results of the experiment indicated that the addition of biodiesel promoted an increase in fuel consumption; in the emission of emitted particles and no variations in gaseous emissions. The additive was effective only in reducing particulate emissions under the conditions and concentrations tested.