Performance and emission characteristics of binary mixture of poppy and waste cooking biodiesel

An experimental study was conducted on a compression ignition (CI) engine using neat diesel and binary mixture of poppy and waste cooking (PWC) biodiesel-diesel blends. Biodiesel-diesel blends of B5, B10 and B20 for PWC were used in this investigation. The experiment was conducted for different engine speed (1200 rpm-2400 rpm) and load (25%, 50%, 75% and 100%). The speed of the engine was varied from 1200 rpm to 2400 rpm with 200 rpm interval. The performance of the engine output is presented in terms of brake power (BP), torque, brake specific fuel consumption (BSFC) and brake thermal efficiency (BTE). The emission characteristics, such as nitrogen oxides (NOx), carbon monoxide (CO), hydrocarbon (HC) and particulate matter (PM) are also presented in this study. The results indicate that BP increases with increase in speed up to the maximum speed of 2400 rpm, whereas, BSFC decreases initially up to 1400 rpm and then increases up to the maximum speed of 2400 rpm at full load condition. On the other hand, torque and BTE initially increases up to 1400 rpm, and then, decreases with increase in speed up to the maximum speed of 2400 rpm. The results revealed that BP, torque, BSFC and BTE are lower in biodiesel blends in comparison to diesel. The engine performance and emission characteristics are compared with diesel. The results revealed that the use of biodiesel-diesel blends led to the significant reduction in carbon monoxide (CO), hydrocarbon (HC) and particulate matter (PM) emissions in comparison to conventional diesel at full load condition. On the other hand, increase in nitrogen oxides (NOx) is observed in using biodiesel blends over the diesel.