Kinetic Analysis of Construction, Renovation, and Demolition (CRD) Wood Pyrolysis Using Model-Fitting and Model-Free Methods via Thermogravimetric Analysis

Aravind Ganesan (), Simon Barnabé (), Younès Bareha, Simon Langlois, Olivier Rezazgui and Cyrine Boussabbeh
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Aravind Ganesan: Institut d’Innovations en Écomatériaux, Écoproduits et Écoénergies, Pavillon CIPP, Université du Québec à Trois-Rivières, Boul. des Forges, Trois-Rivières, QC G8Z 4M3, Canada
Simon Barnabé: Institut d’Innovations en Écomatériaux, Écoproduits et Écoénergies, Pavillon CIPP, Université du Québec à Trois-Rivières, Boul. des Forges, Trois-Rivières, QC G8Z 4M3, Canada
Younès Bareha: Institut d’Innovations en Écomatériaux, Écoproduits et Écoénergies, Pavillon CIPP, Université du Québec à Trois-Rivières, Boul. des Forges, Trois-Rivières, QC G8Z 4M3, Canada
Simon Langlois: Innofibre—Centre d’Innovation des Produits Cellulosiques, 3351, Boul. des Forges C.P.97, Trois-Rivières, QC G9A 5E6, Canada
Olivier Rezazgui: Innofibre—Centre d’Innovation des Produits Cellulosiques, 3351, Boul. des Forges C.P.97, Trois-Rivières, QC G9A 5E6, Canada
Cyrine Boussabbeh: Innofibre—Centre d’Innovation des Produits Cellulosiques, 3351, Boul. des Forges C.P.97, Trois-Rivières, QC G9A 5E6, Canada

Energies, 2025, vol. 18, issue 10, 1-29

Abstract: The pyrolysis of non-recyclable construction, renovation, and demolition (CRD) wood waste is a complex thermochemical process involving devolatilization, diffusion, phase transitions, and char formation. CRD wood, a low-ash biomass containing 24–32% lignin, includes both hardwood and softwood components, making it a viable heterogeneous feedstock for bioenergy production. Thermogravimetric analysis (TGA) of CRD wood residues was conducted at heating rates of 10, 20, 30, and 40 °C/min up to 900 °C, employing model-fitting (Coats–Redfern (CR)) and model-free (Ozawa–Flynn–Wall (OFW), Kissinger–Akahira–Sunose (KAS), and Friedman (FM)) approaches to determine kinetic and thermodynamic parameters. The degradation process exhibited three stages, with peak weight loss occurring at 350–400 °C. The Coats–Redfern method identified diffusion and phase interfacial models as highly correlated (R 2 > 0.99), with peak activation energy (E a ) at 30 °C/min reaching 114.96 kJ/mol. Model-free methods yielded E a values between 172 and 196 kJ/mol across conversion rates (α) of 0.2–0.8. Thermodynamic parameters showed enthalpy (ΔH) of 179–192 kJ/mol, Gibbs free energy (ΔG) of 215–275 kJ/mol, and entropy (ΔS) between −60 and −130 J/mol·K, indicating an endothermic, non-spontaneous process. These results support CRD wood’s potential for biochar production through controlled pyrolysis.

Keywords: biomass conversion; thermochemical; pyrolysis; biofuels; kinetics; thermodynamics (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
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