Análisis comparativo de las emisiones de un motor Diésel empleando mezclas de Diésel comercial con biodiésel de soja.

GABRIEL IMWINKELRIED,; JAVIER NACUSE; MARIO SPINOSA; RAÚL SANCHEZ; MARIANO TERUEL; MARÍA BELÉN BLANCO

Simposio; V Simposio de Química Inorgánica, Analítica y Fisicoquímica (QIAF); 2021

Diesel engine exhaust emissions were identified with 100% commercial Diesel, 75% commercial diesel and 25% soybean oil, and 50% commercial diesel and 50% soybean oil for the following regime of revolutions per minute (RPM): 980, 1270, 1820 and 2420. A MWM International S4T diesel cycle engine in bench mode were used to perform the experiments. Four 80 L Tedlar collapsable chambers and the solid phase micro extraction (SPME) technique ensure volatile organic compounds (VOCs) capture and pre-concentration. Samples were analysed on a gas chromatograph coupled with mass spectrometry (GC-MS). Firstly, no significant changes in engine parameters were observed with the addition of soybean oil. At lower RPM, the highest number of compounds were identified in the samples. For 100% commercial Diesel and 25% soybean oil blend, alkanes were identified with 72.% chromatograms relative area at 1820 RPM. The addition of 25% soybean oil led to the presence of primary alcohols. These compounds were preponderant for the entire engine operating cycle with the 50% soybean oil blend due to long chain unsaturated fatty acids presence in biofuel. In addition, an increase in soybean oil blend causes a reduction in aromatic hydrocarbons relative area.