Radiative energy flux characteristics and model analysis for one-dimensional fixed-bed oxy-coal combustion

This paper describes the radiative energy flux characteristics of fixed-bed oxy-coal combustion for the purpose of guiding the quality-splitting conversion of combustion energy. An experiment was performed in a tube furnace at a temperature range of 800–1200 °C in O2/N2 and O2/CO2 atmospheres, and the radiative intensity was measured. It was found that an increase in oxygen concentration and temperature could increase the radiative intensity more than 1.5 to 2 fold during combustion, and the radiative energy flux was higher for semi-coke than coal by about 16%–27%. The radiative energy results could be described by a semi-empirical model and an artificial neural network (ANN) model. The results showed that the errors of the ANN were less than 0.01%, and demonstrated the superiority of the ANN. This study provides guidance for subsequent research on quality-splitting conversion of combustion energy.

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