Scholarly record
THERMOGRAVIMETRIC STUDY OF BIOMASS OXIDATION
Abstract
As part of this study, a comprehensive thermogravimetric analysis of biomass oxidation was conducted to study its thermal decomposition and determine its kinetic characteristics in an oxidative environment. This work is of great importance for the development of sustainable energy, the optimization of combustion and co-combustion processes, and the minimization of environmental damage through more efficient use of biomass. The experiments involved measuring the mass change of biomass samples (sawdust from hardwood and softwood, and bark) during controlled heating from 25 to 800 °C in an atmosphere with varying oxygen concentrations. The main stages of thermal transformation were identified based on the derived thermogravimetric curves: moisture removal, the release of volatile components, their combustion, and the subsequent oxidation of the carbon residue. The stage activation energies were calculated using the Ozawa-Flynn-Wall method to quantify the process. The obtained data demonstrate that the decomposition profiles vary significantly for different types of biomass, which is directly related to their unique chemical composition, including cellulose, hemicellulose, lignin, ash, and inorganic substances. The research was funded by the Russian Science Foundation (grant 22-79-10096-P).
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