Abstract
The increased use of modern society vehicles is rising the pollutant gas emissions causing several environmental and public health problem in urban centers. Diesel fuel is a major emitter of pollutant gases, especially in Brazil, where the transport is predominantly by land. For this reason, Brazilian government aims to modify the energy matrix with the addition of renewable energy sources, such as biodiesel. In this paper, we studied the emission of ethylene gas from the combustion of binary mixtures, because this gas is directly related to the formation of photochemical smog. The Brazilian government does not have specific regulations for the emission of ethylene yet. Thus, it becomes necessary to monitor and to detect this gas through sensitive and selective methods, such as Photoacoustic Spectroscopy. This method was employed in the analysis of binary mixtures of soybean biodiesel in diesel in the following proportions: B5, B10, B15, B20 and B25, which have been tested for combustion in an engine bench. In all samples, ethylene was found in ppmv concentrations.
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