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Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received September 15, 2011
Accepted September 19, 2012

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Thermal degradation and kinetic study for different waste/ rejected plastic materials

Srujal Rana Jigisha Kamal Parikh^1† Pravakar Mohanty²

Department of Chemical Engineering, Sarvajanik College of Engineering and Technology, Surat, Gujarat, India ¹Department of Chemical Engineering, Sardar Vallabhbhai National Institute of Technology, Surat-395007, Gujarat, India ²Department of Chemical Engineering, Indian Institute of Technology, Delhi 110016, India

Korean Journal of Chemical Engineering, March 2013, 30(3), 626-633(8), 10.1007/s11814-012-0157-2

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Abstract

A kinetic analysis based on thermal decomposition of rejected polypropylene, plastic film and plastic pellets collected from different industrial outlet has been carried out. Non-isothermal experiments using different heating rates of 5, 10, 20, 30, 40 and 50℃ min.1 have been performed from ambient to 700 ℃ in a thermo-balance with the objective of determining the kinetic parameters. The values of activation energy and frequency factor were found to be in the range of 107-322 kJ/mol, 85-331 kJ/mol, 140-375 kJ/mol and 3.49E+07-4.74E+22 min^(-1), 3.52E+06-2.88E+22min^(-1), 7.28E+13-1.17E+25 min^(-1) for rejected polypropylene, plastic film and plastic pellets, respectively, by Coats-Redfern and Ozawa methods including different models. Kissinger method, a model free analysis is also adopted to find the kinetic parameters. Activation energy and frequency factor were found to be 108 kJ/mol, 98 kJ/mol, 132 kJ/mol and 6.89E+03, 2.12E+02, 8.06E+05 min^(-1) for rejected polypropylene, plastic film and plastic pellets, respectively, by using the Kissinger method.

Keywords

Thermal Pyrolysis Plastic Waste TGA DTG Kinetic Parameters

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