Analysis of the influence of fuel characteristics and temperature conditions on the emission of harmful products of biomass combustion
2018
Repić, Branislav | Erić, Aleksandar | Nemoda, Stevan | Dakić, Dragoljub
Biomass combustion is followed by emission of many pollutants, i.e. NO, NO2, CO, CO2 and in small amount SO and SO2 compounds. In order to find a suitable method for organizing the combustion process, it is necessary to analyze the influence of temperature on combustion pollutant products emission. Such an analysis is being performed by computation of the chemical thermodynamic equilibrium composition of the system, which yields the equilibrium composition of flue gases with respect to the combustion temperature. The thermodynamic computations of the chemical equilibrium enable reducing the range experimental investigations and estimating the probability of particular reactions. In the paper presented are the results of an application of the developed model on computation of chemical thermodynamic equilibrium of a system formed by compounds and elements contained in fuel and combusted air. The results are obtained at temperatures from 800-1700 K, pressure 1 bar, excess air = 1.0, 1.50, 2.0, 2.5 and 3.0, moisture content W = 10, 20, 30, 40 and 50%, and for several different types of biomass. For practical application of computation results in the paper presented are the results of measurements of the local furnace temperature conditions at 1.5 MW and 75 kW boilers burning biomass.
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