Comparative assessment of performance, emissions and combustion characteristics of tire pyrolysis oil-diesel and biodiesel-diesel blends in a common-rail direct injection engine

• Published in: Fuel (Guildford) 2022-04, Vol.313, p.123058, Article 123058
• Main Authors: Teoh, Y.H., Yaqoob, H., How, H.G., Le, T.D., Nguyen, H.T.
• Format: Article
• Language: English
• Subjects: Alternative fuels; Biodiesel; Biodiesel fuels; Biofuels; Brakes; Calorific value; Climate change; Combustion; Common-rail; Cylinders; Depletion; Diesel; Diesel engine; Diesel engines; Diesel fuels; Emissions; Energy demand; Fossil fuels; Fuel technology; Heat release rate; Heat transfer; Internal combustion engines; Nitrogen oxides; Opacity; Photochemicals; Population growth; Pyrolysis; Reduction; Thermodynamic efficiency; Tire pyrolysis oil
• ISSN: 0016-2361; 1873-7153
• DOI: 10.1016/j.fuel.2021.123058

•TPO-diesel and biodiesel-diesel blends on engine's out-responses were studied.•P10 is better than the B10 in terms of torque, brake power, and brake thermal efficiency.•B10 shows lower smoke emissions as compared to P10 and diesel.•P10 indicates a reduction in NOx emission at 3500 rpm as compared to diesel and B10 fuels.•P10 is comparable with B10 and suitable as an alternative fuel in the diesel engine. Alternative fuels have gained attention in diesel engines due to the depletion of fossil fuels, climate change, economic issues, population growth, and energy demand. So, the experimental study was conducted by using the tire pyrolysis oil (TPO), biodiesel and diesel blended fuel to compare the combustion, performance, and emission characteristics in the multi-cylinder high-pressure common-rail diesel engine. The results show that the cylinder pressure and heat release rate of all the tested fuels are comparable, especially at 3500 rpm. The torque, brake power, and brake thermal efficiency of P10 is greater than the B10 and diesel fuel due to its high calorific value and oxygen share. At 3000 rpm, the P10 shows the maximum brake thermal efficiency (BTE) of 27.9%, which is 2.2% and 3.3% higher than the B10 and diesel fuel, respectively. P10 indicates the 4% and 5.64% reduction in brake specific nitrogen oxides (BSNOx) emission at 3500 rpm relative to diesel and B10 fuel, respectively. Meanwhile, the highest reduction of 20.2% in smoke opacity was found using P10 compared to diesel fuel at the engine speed of 2000 rpm. Finally, it is concluded that the P10 is suitable as an alternative fuel for multi-cylinder diesel engine without any modification and in fact most of its combustion, performance and emission characteristics are outperformed the B10 fuel.