Study on Pyrolysis Process of Waste TV Plastic Shells by Thermogravimetric Kinetic Analysis

Polystyrene was confirmed to be the main component of the waste TV plastic shells(WTVPS) by IR spectrometry and the kinetic parameters were obtained for the pyrolysis kinetics of the WTVPS by thermogravimetric method.Accordingly,the pyrolysis reaction of the WTVPS could roughly be divided into three stages: low temperature stage(mass loss rate of 10%-20%),medium temperature stage(mass loss rate of 30%-70%)and high temperature stage(mass loss rate of 80%-90%).At low temperature stage,the activation energy of WTVPS was found to be about 150 kJ·mol-1,the reaction could be termed as zero-order reaction;at medium temperature stage,the activation energy was about 200 kJ·mol-1,termed as first-order reaction;but at high temperature stage,the activation energy increased significantly,and the extent of the deviation from the first-order reaction increased with the increase of mass loss rate.