Nanoparticle-assisted ternary fuel blends: an investigation of diesel engine performance, combustion and emission profiles
摘要
The main objective of this study is to evaluate the operating parameters of a diesel engine running on a ternary fuel mixture in combination with titanium oxide nanoparticles. Two separate feedstocks namely Ricinus communis and Cassia fistula were combined to produce the hybrid biodiesel. Three different alcohols-iso-butanol, iso-propanol, and n-butanol each accounting for 5% of the total volume were also added to the biodiesel blend. To increase stability, an additional 75 ppm titanium oxide nanoparticles were accompanied to the ternary fuel. The ternary fuel mixture improved the brake thermal efficiency and slightly reduced the brake specific fuel consumption. Combustion characteristics such as the net heat release rate and cylinder pressure were likewise amended. Emissions of carbon monoxide, unburned hydrocarbons, and smoke have also been reduced. However, emissions of nitrogen oxides increased. By introducing nanoparticles into the ternary fuel mixture, both performance and combustion behaviour were improved, while emissions, especially nitrogen oxides, were significantly reduced. The biodiesel blend with 5% n-butanol and 75 ppm nanoparticles addition achieved the best results, and the specific brake fuel consumption was 0.173 kg/kWh, accompanied by a thermal braking efficiency of 26.91%. The cylinder pressure reached a maximum value of 68.12 bar and the net heat release rate reached 70.14 J/°CA. Emissions of 0.051% for carbon monoxide, 31 ppm for unburned hydrocarbons, 1245 ppm for nitrogen oxides and 32.63% for smoke opacity were measured.