Research on the Pyrolysis Behavior of Waste Tire

摘要

The amount of waste tires generated each year in China is increasing and becomes an unacceptable problem. Here the pyrolysis behavior of three tire samples was investigated by means of non-isothermal thermo-gravimetric analysis in high purity N_2 (99.99%) at heating rates ranging from 5 to 20K/min. At different heating rates, the two distinct pyrolysis peaks in the DTG profiles of the two samples from outer cover and only one in the DTG profile from inner tube have been recognized. However, the pyrolysis of waste tire is extremely complex and it is difficult to investigate the transition of the activation energy of tire during pyrolysis. Here DAEM is used to investigate the activation energy of the tires during pyrolysis. The result shows that the activation energy of the two outer cover samples increase to a peak and then decrease a little. But the activation energy of the inner tube sample increases with the increase of the conversion. All the results suggest the compositional difference between the samples.