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Abstract
In this paper an analysis is presented to predict the spectral absorption, extinction and scattering coefficients of polydispersions of carbon, different coals, and fly-ash particles. The normalization of the efficiency factors are given. Relatively simple, closed form expressions are derived for the spectral absorption and extinction coefficient. These simplified relations are promising for accurately predicting the radiative properties for use in multidimensional, spectral, radiative heat transfer analyses.