Performance, combustion and emission characteristics of a diesel engine using composite biodiesel from waste cooking oil- Hibiscus Cannabinus oil

The energy utilization from waste is a prime requirement due to the surge in consumption, environmental emission, and pricing of automobile fuel. Biodiesel is a significant source of renewable energy, not only because of its ability to satisfy energy demand but also its ability to mitigate greenhouse gas emissions. Biodiesel was produced in this study by combining waste cooking oil (WCO) with Ambadi Seed Oil (Hibiscus Cannabinus) (AO) and WCO. The oil samples of WCO, composite oil W50A50 (50% WCO and 50% AO), and W75A25 (75% WCO and 25% AO) were converted into biodiesel employing the homogenous catalyst based transesterification technique. The critical physio-chemical properties of biodiesel samples were measured. The combustion, per-formance, and emissions characteristics of biodiesel samples were determined. W50A50DB20 shows maximum peak cylinder pressure and peak heat release rate of 6.37% and 13.81% higher waste cooking biodiesel blends. Brake Thermal Efficiency (BTHE) of composite biodiesel blend W50A50DB20 is 3.49% higher compared to WCDB20. BSFE of W50A50DB20 and W50A50DB30 were 4.16% and 11.51% higher compared to diesel fuel. The exhaust NOx was maximum for WCDB30 and minimum for W50A50DB20 at 100% load. The least greenhouse gas emission has resulted in W50A50DB20 among tested fuels.