Pyrolytic oil blended gasoline as future fuel: pyrolysis mechanism, fuel properties, and composition analysis

In this investigation, waste motor oil (WMO) was pyrolyzed at 550 °C which yielded about 76.73 wt.% of pyrolytic oil (PO). To study the effect of blending with gasoline on the fuel properties and composition, the PO was blended at 5-30% with an augmentation of 5% by volume. The respective fuel properties of all the blends were determined and compared with gasoline. The prime blending percentage of WMO pyrolytic oil (WMOPO) was established based on the gross calorific value obtained. Among all the blends, 5% blending PO (B5) ensued the highest calorific value about 45.63 MJ kg^-1 which was adjacent to gasoline. The B5 oil was also having an analogous density as gasoline. The composition analysis visualized that B5 comprised of alkenes (1.25%), cycloalkanes (3.88%), cycloalkenes (2.43%), aromatics (25.38%), and alkanes (53.75%). The results also confirmed the occurrence of 50.52% of C4-C12 compounds. Since the fuel properties and composition of the B5 oil were comparable to the untainted gasoline, it can be a suitable proportion to consider as future fuel if the engine performance and emission analysis show any positive effects.