The Pyrolysis Characteristic of Waste Tire Tread

Abstract

Waste tires are generated everyday since automobiles are necessities for daily life. As the resource is limited, recycling waste tires and turning them back into new resources is considered to be the most environmental friendly option. In order to develop the technique that waste tire recycling plants needs, the pyrolysis characteristic of waste tire was studied to understand the relationship between pyrolysis-derived gases and the temperature. Based on the pyrolysis characteristic of the waste tire tread and the published experimental data [1] [2], the model of relationship between the weight loss and temperature during the process of waste tire pyrolysis was set up in this paper. Then, a mathematical method was used to study the relation between the pyrolysis velocity and temperature, coordinating with gas generation rate during pyrolysis, to provide the practical techniques for the waste tires pyrolysis disposal plants. The mathematic model of tire pyrolysis established in this paper tried to simulate the temperature being heated up constantly from 300℃ to 600℃, with 50℃ increment as a section to detect the derived gases relatively. Based on the desired gas equation, mass constant equation and the generation rates of gases in different temperature sections, the effect of temperature on the generation velocity rate of the derived gases was obtained. Then, a model that could analyze the reaction velocity, temperature and time of waste tire tread pyrolysis was set up to control the velocity and time of pyrolysis.