Gas from the Pyrolysis of Scrap Tires in a Fluidized Bed Reactor

A fluidized sand bed reactor was used to study the production of gases from scrap tires at four nominal temperatures (ranging from 600 to 900 °C). Yields of 17 pyrolysis products (methane, ethane, ethylene, propane, propylene, acetylene, butane, butylene, 1,3-butadiene, pentane, benzene, toluene, xylenes + styrene, hydrogen, carbon monoxide, carbon dioxide, and hydrogen sulfide) were analyzed as a function of the operating conditions. The results are compared with the data obtained by pyrolysis of tires in a Pyroprobe 1000, where secondary tar cracking is small. Correlations between the products analyzed with those of methane are discussed.