Thermal properties of pulverized coal govern the heat transfer and greatly in uence the coal dust explosion and spontaneous combustion processes. This study measures the thermal properties of ve coal samples at six distinct particle sizes using an advanced Thermal Property Analyzer. The thermophysical properties of coal dust positively correlated with particle size. Thermal conductivity, diffusivity and speci c heat capacity increased with increase in the ash percentage, bulk density, and speci c gravity of coal dust, whereas they negatively correlated with xed carbon and volatiles content of coal.Empirical relations between the thermo-physical properties were developed. The thermal conductivity, diffusivity, and speci c heat capacity of coal dusts varied in the ranges of 0.091-0.147 W/mK, 0.125-0.164 mm²/s, and 0.715-0.945 MJ/m³K, respectively. With increase in particle size from < 38 to 500-1000 µm, thermal conductivity, thermal diffusivity and speci c heat capacity increased in the range of 25.60-32.89%, 9.76-22.11%, and 9.57-20.80%, respectively for different coal samples.
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