Abstract:This paper analyze the thermal weightlessness properties and pyrolysis dynamics of waste mushroom bran by thermal heavy IR coupling technology （thermogravimetry-Fourier transform infrared analysis，TGFTIR)and monitor the gas release behavior during pyrolysis.The average weight loss rate of bacterial bran was 58% during the pyrolysis process.Moreover，with the increasing heating rate，the maximum weight loss rate and volatile release index increased gradually，indicating a better release performance for the volatiles.The prominent volatile components produced during the pyrolysis process of mushroom bran were CO2，aromatic hydrocarbon，aldehydes，ketones，etc.The release content of CH4was relatively low；it exhibited a bimodal form with temperature.The kinetic analysis of the pyrolysis process fitted by the Coats-Redfern method indicated that the F1.5 reaction model had the highest correlation coefficients under all three heating rates.The calculated activation energies based on this model were in the range of 105.92 kJ/mol-106.93 kJ/mol.Meanwhile，the activation energies calculated by an isoconversional model-free method increased with the conversion rate.