Optimization of Process Parameters for Higher Recovery of Fuel Oil from Mixed Plastic Wastes

Abstract

Pyrolysis is an efficient method to convert plastic waste to fuel oil, pyrolytic gas, and solid residue. The yield of these products may vary with feedstock types and reaction conditions. The mixed plastic waste HDPE, LDPE and PP was selected and characterized for fuel oil synthesis. The moisture content and bulk density of mixed plastic wastes were found as 0.18 % and 38 %, Kgm-3 respectively. Three reaction temperatures (400, 450, and 500°C) were used in a pyrolytic reactor for optimizing the pyrolysis process. Results showed that the reaction temperature has a significant influence on fuel oil yield. The optimal reaction temperature for maximum fuel oil yield (84.7%) from mixed plastic wastes was found at 500°C in the reactor. The fuel properties of fuel oil produced from plastics wastes are comparable with petrol and diesel fuels.