Co-pyrolysis of coal and lignocellulosic biomass has the potential to mitigate the emission of greenhouse gases from an energy supply. Successful application of this technology requires proper investigation on the influence of coal and lignocellulosic biomass mixing on thermal behavior and product characteristics. Therefore, in this study, thermal behavior of a kind of Chinese bituminous coal blended with edible fungi residue (EFR) was evaluated through nonisothermal thermogravimertic analysis. Raman spectroscopy and scanning electron microscopy with energy dispersive spectroscopy techniques were applied to determine the char structure evolution. The results revealed that the EFR promoted thermal decomposition of the bituminous coal and synergy effect on char yield was observed The activation energy distribution calculated via an isoconversional method showed nonaddltivity performance, which may be caused by the catalytic effects of alkali and alkaline earth metals and the char structure evolution. The Raman spectrum results indicated that the Raman intensity of the co-pyrolysis char increased with the EFR. ratio, which can be due to the combined effect of the O-containing groups and nonprpportional effects of alkah and alkaline earth metallic species. The area ratio of the G (graphite) band to all the bands (A_G/ A_(all)) and that of the valley between D (disordered) and G bands to the D band (A_GR)/A_D and A_((GR+VL+VR))/A_D) had been found useful in evaluating the evolution of the char structure. An increase in A_G/A_(all) seemed to suggest the increasing aromatization of the chars. The increase in A_(GR)g/A_D and A_((GR+VL+VK))/A_D implied the generation of more smaller (3—S rings) aromatic ring structures and the elimination of lager (no less than 6 rings) aromatic ring systems in the char samples as the EFR ratio increasing.
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