Pyrolysis for the Recycling of Polystyrene Plastic (PSP) Wastes in a Swirling Fluidized-Bed Reactor

摘要

Pyrolysis of waste polystyrene plastics (PSP) was investigated for the effective recycling. To obtain the kinetic information, a non-isothermal process (TGA/DTA) was used. The thermal decomposition was conducted in a swirling fluidized-bed reactor (0.762 m ID x 2.5 m in height). The apparent activation energy for the thermal decomposition of waste PSP was in the range of 50.4-72.1 kJ/mol according to the conversion level. The mean reaction order was 0.36. In the swirling fluidized-bed reactor, the optimum temperature, gas velocity and swirling ratio were 500℃, 0.4 m/s and 0.3, respectively, for the maximum yields of oil and styrene monomer.