Physicochemical investigation and thermogravimetric analysis of bamboo and poplar wood residues and tire rubber waste: Kinetic and thermodynamic analyses

This work conducted a physicochemical investigation of bamboo and poplar wood residues and tire rubber waste and their potential for conversion by pyrolysis from kinetic and thermodynamic aspects. The activation energies were obtained by means of a modified Friedman isoconversional method, with varying values of 133.0-248.4 kJ mol-1, 162.7-235.2 kJ mol-1, and 111.5-275.2 kJ mol-1 for the pyrolysis of bamboo and poplar wood residues and tire rubber waste, respectively. A combination of the kinetic compensation effect and a general empirical reaction model was used for the simultaneous determination of the frequency factors and empirical reaction models. The frequency factors of the pyrolysis of bamboo and poplar wood residues and tire rubber waste ranged from 1.5 x 109 to 4.7 x 1018 s- 1, 1.2 x 1012 to 2.3 x 1018 s- 1 and 1.3 x 107 to 3.4 x 1020 s- 1, respectively. The effective thermodynamic parameters for the pyrolysis of bamboo and poplar wood residues and tire rubber waste were calculated, which indicated that these samples exhibited significant potential as raw materials for pyrolysis conversion.