In this paper

the pyrolysis characteristics of waste tire rubber with catalyst addition were experimentally studied. Pyrolysis experimentations of waste tire rubber with either base

acid or Zeolite catalysts were performed in a Thermal Gravimetric Analyzer

a one-stage test rig and a two-stage test rig respectively. This is followed by analysis into the rates of pyrolysis reactions and the yields and distribution of the three-phase products using thermogravimetric infrared spectroscopy (TG-IR) and gas chromatography-mass spectrometry (GC-MS). Results indicated that the transition metal chloride catalysts improved the reaction rate and were overall effective than the solid acid-base catalysts. Benzene and toluene yields were improved by all three catalysts in the primary pyrolysis

and the best performance was achieved at 550 °C and 600 °C with 30% NaOH. With ZSM-5 in the secondary pyrolysis

proportion of high calorific gases components as H

2

and CH

4

were increased

and the arylation and isomerization reactions were also promoted. The optimum aromatics yield was achieved at 600 °C and 50% ZSM condition. This study would provide a reference for resourceful utilization of waste tires.