Medidas da emissão de poluentes e da eficiência na combustão assistida do glicerol residual de biodiesel. / Measurements of emissions and fuel efficiency of the assisted residual glycerol biodiesel.

AUTOR(ES)
FONTE

IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia

DATA DE PUBLICAÇÃO

29/11/2010

RESUMO

With increased global production of biofuels in particular biodiesel, an excess of glycerol is being generated worldwide. This has caused a sharp drop in the price of this compound in the world market. Much thought has been given to a destination for this residue, since no one can lay it in the environment and one of the alternatives be to use would its calorific value by combustion. This energy could be used in the production process of biodiesel in order to produce electricity or heat. But some peculiar characteristics of glycerol hinder its burning. Among them is its high ignition point, around 370 C, its high viscosity and the emission of toxic compounds such as acrolein, aldehydes very harmful to humans health. With this is more than necessary to monitor and control such burning. It is on these arguments that this work aims to study the efficiency and gases emitted during the burning of residual glycerol from biodiesel. For this it was developed a combustion chamber with a LPG atmospheric burner of approximately 2.5 kW of power. To perform measurements of the combustion parameters, it was used a gas analyzer. Were analyzed five pre-determined flows of glycerol, up to 0.12 liters per hour, the main parameters and pollutants in exhaust gases in five, among them are: oxygen (O), carbon monoxide (CO), nitrogen oxide (NO), temperature of exhaust gases, excess air, efficiency of combustion and nitrogen oxides (NOx). At the end of the experiments was observed at increase temperature exhaust gas from about 120 to 166 C with the increased flow of glycerol, indicating an increase of the energy to system. The more efficient burning of 90.3% was obtained at a flow rate of 0.12 l / h, while the lowest efficiency, 88.7% occurred at a flow rate of 0.06 l/h. A great advantage observed with the burning of glycerol is the significant reduction in emissions of NOx that decreased from 23 to about 4 ppm with the addition of glycerol the assisted LPG burning.

ASSUNTO(S)

biodiesel. glicerol. combustão fisica biodiesel. glycerol. combustion

ACESSO AO ARTIGO

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