Study on Pyrolysis Characteristic of the Waste Tires

Abstract

The effects of pyrolysis temperature on the yields of char ,oil and gas produced in the waste tire pyrolysis process ,the effects of temperature on the concentration of gas and pyrolysis oil constitutes, and the effects of HY-51 (as catalyst) on the yields and on the concentration of gas constitutes, were studied in detail. The experiments showed that the effects of pyrolysis temperature on liquid and gas products were important. The yields of the gas were primate raised, then reduced. When the pyrolysis temperature reached 550°C, the yields of oil can reach to above 45%. when adding catalyst, the yields raised to 50%.Gas product were component of H2, CH4, CO,CO2 and C2-C3, etc., there were a lot of macromolecular aromatic, and contain acid, hydrocarbon, ketone, heterocyclic (containing S, O, N, etc)in pyrolysis oil. we had been done the thermogravimetric experiments. Which were indicated that waste tire have three main mass loss stages. The range of first stage temperature was 200-350°C, 270°C was the maximum temperature of mass loss ,and the mass loss rate reached to 20.4%;The second stage mass loss temperature was 350-600 °C, the biggest temperature mass loss were in 484 °C and 547 °C, this stage rate was 64.6%; the range of the third stage was 600-675 °C, had a small mass loss peak, the rate just was 2.5% The pyrolysis oils analysis were provided the basic data for the chemical and energy basic on pyrolysis and pyrolysis characteristic of the waste tire.