Experimental Investigation of Plastic Waste Pyrolysis Fuel and Diesel Blends Combustion and its Flue Gas Emission Analysis in a 5 Kw Boiler

Abstract

Environmental issues and energy shortages have become increasingly prominent. In this work, the upgraded plastic pyrolysis oil was used to investigate the performance of the 5 kW scale boiler combustion. The plastic pyrolysis middle oil (diesel-like fraction, C 11 -C 22 ) was similar to the properties of the diesel (HHV: 45.0 MJ/kg, viscosity: 2.70 cSt at 40 ℃). The plastic pyrolysis fuel and diesel blends (100% diesel, 10%, 30% and 50% plastic waste pyrolysis fuel) were prepared. The efficiency of combustion using 10% and 30% pyrolysis fuel blends showed about 58% at a fuel-air equivalence ratio (Ф) of 0.91, which was similar to that of diesel (58.1%). The highest boiler internal temperature was about 1060 ℃ (Ф=0.91). In addition, the flue gas composition of all the blends showed similar concentrations of CO (about 13 ppm at Ф=0.91) and CO 2 (about 13 vol.% at Ф=0.91). However, a higher NOx concentration was observed with pyrolysis fuel blends (80-130 ppm) than that of diesel due to its higher nitrogen content in plastic waste pyrolysis fuel. This study suggested that plastic pyrolysis fuel has a good application prospects as an alternative fuel for diesel.