Multi-scale reaction kinetic characteristics of waste tire pyrolysis
Waste tire pyrolysis has emerged as a leading treatment technology due to its broad applicability, high resource recovery efficiency, and low environmental pollution. This study employs thermogravimetric analysis to investigate the influence of heating rate on pyrolysis characteristics and systematically analyzes reaction kinetics across three scales: overall reaction, weight-loss stages, and Fraser-Suzuki deconvolution. The Fraser-Suzuki function, with its asymmetric peak-fitting capability, outperforms conventional methods in describing the complex continuous reaction, achieving superior fit accuracy (R²=0.998). Deconvolution resolves the pyrolysis into four pseudo-components: additives, natural rubber, synthetic rubber, and high-temperature residual reactants, with average activation energies of 118.21, 202.60, 231.98, and 251.97 kJ/mol, respectively. The study provides critical theoretical support for temperature-zone control and reactor design optimization in waste tire pyrolysis technologies.