The combined effect of green synthesized nitrogen-doped carbon quantum dots blended jackfruit seed biodiesel and acetylene gas tested on the dual fuel engine

The main goal of this research is to make a single-cylinder, dual-fuel diesel engine use less fossil fuel and produce less pollution. As fuel sources, acetylene gas as an injected fuel, 100% premium diesel, biodiesel from jackfruit seeds, and 50 parts per million of novel green nitrogen-doped carbon quantum dots prepared from citrus juice and studied for their properties were chosen. In this study, cylinder pressure, heat release rate, brake thermal efficiency, brake-specific fuel consumption, exhaust gas temperature, hydrocarbons, carbon monoxide, oxides of nitrogen, and smoke emissions were analysed. At 100% load, the fuel blend (20% jackfruit seed biodiesel + 80% premium diesel + 50 parts per million of nitrogen-doped carbon quantum dot nanoadditives by biological route + 6 liquids per minute of acetylene gas) performed better than 100% premium diesel in terms of brake-specific fuel consumption (8.24%), exhaust gas temperature (5.88%), and oxides of nitrogen (13.29%). Then this fuel blend had a lower rate of brake thermal efficiency (5.14%), hydrocarbon content (23.36%), carbon monoxide (23.92%), smoke emission (14.72%), cylinder pressure (3.73%), and heat release rate (3.778%) when compared with the 100% premium diesel at 100% load. •Nitrogen-doped carbon quantum dots nanoadditives were observed as an efficient fuel.•At peak load, this fuel blend has a BTE that is 5.14% lower and a BSFC that is 8.24% higher than premium diesel.•Minimal rate of cylinder pressure by 3.73% and the HRR by 3.78%.•HC, CO, and smoke emissions are reduced by 23.36%, 23.92%, and 14.72%, respectively.•The NOx emissions and EGR were higher by 13.92% and 5.88%.