Energy generation and exhaust emissions in a stationary engine using soybean and beef tallow biodiesel blends with diesel and additives

The aim of this study is to present the potential benefits of soybean and beef tallow biodiesel with and without additives on a stationary engine for fuel consumption and low emissions. The biodiesel characterisation has been presented. The additives used in the tests were acetone (1%), 2-butanol (2%), isopropanol (2%), n-butanol and ethanol (2%). The blends of diesel–biodiesel were B0 (diesel), B20, B30, B50, B75, B100 (soybean), B100 (beef tallow). Five fuels had a differentiated performance in reducing NOx, strongly indicating that it was possible to reduce NOx and control such emissions. The B30 (70% diesel, 15% soybean biodiesel and 15% beef tallow biodiesel) reduced 5.8% of NOx compared with diesel. In B30 with 1% acetone, the reduction of NOx compared with diesel was 7.4%, enhancing the result of B30 without the additive. The BSFC of B5 was 5.5% less than diesel.