Applied Chemical Engineering

Pyrolysis of municipal solid waste: Kinetics and thermodynamic parameters via Coats-Redfern method

Abu Md. Mehdi Hassan

Faculty of Applied Science, Lincoln University College

Muhammad Asif

Department of Environmental Sciences, COMSATS University Islamabad

Tariq Hussain

Solid Waste and Toxicology Lab, Department of Applied Chemistry, Government College University

Rida Sajjad

Institute of Energy and Environmental Engineering, University of the Punjab

Farzana Yasmin

Faculty of Applied Science, Lincoln University College

Mayeen Uddin Khandaker

Centre for Applied Physics and Radiation Technologies, School of Engineering and Technology, Sunway University

DOI: https://doi.org/10.59429/ace.v7i2.1872

Keywords: waste; pyrolysis; Coats Redfern method; thermos-kinetic parameters

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Abstract

Renewable and sustainable energy resources are the dire need of time for environmental sustainability and to minimize the effects of global warming and climate change. The objective of this study was to investigate the thermos-kinetic parameters of municipal solid waste through pyrolysis. The sample was collected and prepared according to the American standards for test materials. Thermogravimetric analysis showed the three distinct regions, while the maximum degradation occurs in the second region within the temperature range of 230–400 ℃. A model-fitting approach using the Coats Redfern model was applied in this region to perform thermo-kinetic analysis. Based on the kinetic analysis, the D3 diffusion model showed the highest regression coefficient with an activation energy of 16–18 kJ/mole among all three diffusion models. Thermodynamic analysis showed that the pyrolysis process is endothermic, the product has more energy and a well-ordered arrangement of molecules confirmed by the positive change in enthalpy values and negative entropy values. The results demonstrate the usefulness of municipal solid waste in the creation of productive methods for converting to energy.

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