INVESTIGATION OF ENGINE PERFORMANCE INDICATORS AND EMISSIONS CHARACTERISTICS OF SECOND GENERATION BIOFUELS AND TYRE PYROLYSIS OIL BLENDS

Abstract

The article analyses the influence of second-generation biofuels and tires pyrolysis oil and their mixtures, on the indicators of diesel engine performance and exhaust emissions. Experimental studies were carried out with a single-cylinder, four-stroke, air-cooled, direct injection diesel engine. Second-generation biofuels (HVO), tyre pyrolysis oil (PPA) and their PPA15, PPA30, and PPA60 blends were used in the studies. During the test, the operating parameters of the engine were measured: the frequency of rotation of the crankshaft, engine air consumption, fuel consumption, engine torque, exhaust emissions and smokiness of gases.

After analysing the results obtained during the experimental study, it was noted that in addition to all load modes, the lowest fuel consumption was obtained when the engine was running on HVO fuel. When the engine was running at full load, the lowest emissions of nitrogen oxides (NO_X) were obtained when the engine was running on pure second-generation biofuels (1571 ppm). When the engine was running at full load, the maximum carbon monoxide (CO) emission (1288 ppm) was obtained by powering the engine with PPA fuel. When the engine was running in full load mode, the HVO-fuelled engine smoked 78.1% less compared to tire pyrolysis oil.