A comparative study of six-cylinder direct injection compression ignition engine fueled with Argemone Mexicana bio-diesel with and without selective catalytic reduction

Abstract

ABSTRACT The present experimental investigation is related to the performance and exhaust emission parameters of Multi-Cylinder Direct Injection (DI) Compression Ignition (CI) engine fueled with various proportions of Argemone Mexicana (Argemone Mexicana Linn.) with diesel such as 0BD+100D (Neat Diesel), 25BD+75D, 50BD+50D, 75BD+25D, and 100BD+0D (Neat Bio-diesel) at various speed ranges of 1200, 1600, 2000, and 2400 rpm. The present work focuses on reducing the oxides of nitrogen (NOx) by using the Selective Catalytic Reduction (SCR) technique and compared the test results with the Conventional Engine (CE) method at various speed and different blends of fuel. In Conventional Engine, the percentage reduction in brake thermal efficiency for neat biodiesel (B-100) at lower speed and higher speed is 3.49% and 3.07%, respectively, as compared to B-0 and B-25. For B-100, the percentage increase in brake-specific fuel consumption at lower speed and higher speed is 29.16% and 30.01%, respectively, as compared to B-0 and B-25. The percentage reduction in heat release rate for neat bio-diesel is 27.44% at zero degree crank angle as compared to neat diesel fuel. At lower speed (1200 rpm) and higher speed (2400 rpm), the percentage reduction in smoke density is 8.31% and 9.61% for B-25 as compared with B-100, respectively. The percentage reduction in hydrocarbon at lower speed and higher speed is 21.42% and 23.53% for B-0 as compared with B-100, respectively. The percentage reduction in CO for B-25 is 4.17% and 11.43% at lower speed and higher speed, respectively, as compared with B-0. The same trend is observed from the SCR technique method. There is a significant reduction of oxides of nitrogen noted for B-100 with SCR technique at a lower and higher speed of 16.45% and 17.56%, respectively, as compared to Conventional Engine. However, the engine performance such as Brake Thermal Efficiency (BTE), Brake Specific Fuel Consumption (BSFC), Heat Release Rate (HRR), and other emissions such as Hydrocarbon (HC), Carbon monoxide (CO), and Smoke Density (SD), B-25 (25BD+75D) gives better results while compared to neat diesel (0BD+100D) and higher blends for all the speeds in Conventional Engine and Selective Catalytic Reduction technique.