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Thermal degradation and kinetic study for different waste/rejected plastic materials
Jigisha Kamal Parikh,Srujal Rana,Pravakar Mohanty 한국화학공학회 2013 Korean Journal of Chemical Engineering Vol.30 No.3
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 oC min−1 have been performed from ambient to 700 oC 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.