Abstract
Non-isothermal co-pyrolysis of Delonix regia and tube waste was carried out using a thermogravimetric analyzer under nitrogen atmosphere at temperatures 25 to 1000 °C, with heating rates between 5 and 55 °C min−1. The kinetic triplets were estimated using five iso-conversional models: Differential Friedman, Kissinger-Akahira-Sunose, Ozawa-Flynn-Wall, Starink, and Distributed Activation Energy Method. In kinetic analysis, the average activation energy (Eα, kJ mol−1) and frequency factor (ko, min−1) values were 230.47 and 2.55× 1030; 208.13 and 8.31× 1026; 207.78 and 1.58× 1024; 208.38 and 6.47× 1026; 208.13 and 5.15× 1026; respectively. In thermodynamic analysis, average values of ΔH, (kJ mol−1), and ΔG, (kJ mol−1) were 225.38, 179.9; 225.28, 180.22; 225.18, 180.31; 225.08, 180.99; and 224.98, 182.15; respectively. Criado's master plot revealed a multistep reaction mechanism for the co-feed.
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