Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
STUDY OF THE OXIDATION OF AUTOMOTIVE LUBRICANTS CONTAMINATED WITH BIODIESEL AND BLENDS
Submission Author:
Maria Thereza dos Santos Silva , RN
Co-Authors:
Salete Alves, Raíssa Silva, Ranaildo Silva, Maria Thereza dos Santos Silva
Presenter: Maria Thereza dos Santos Silva
doi://10.26678/ABCM.COBEM2017.COB17-2751
Abstract
The use of biodiesel as a fuel can cause wear to the internal parts of the engine because it comes in contact with lubricating oil and causes an increase in the rate of oxidation of the lubricant, thus causing it to not perform its function. There is great use of biodiesel in the world, but the effects of this fuel on the performance of lubricating oil must be investigated. This study investigated the presence of biodiesel in the condition of lubricating oil, monitoring the contact time. Methyl soybean biodiesel samples (B100) and diesel biodiesel blends (B10 and B20) were used as contaminant for 15W40 oil lubricant, the percentage of contamination was 1% and 2%. Oxidative stability was measured by the acid index, differential scanning calorimetry (DSC) and confirmed by infrared spectroscopy (FT-IR) technique. The acidity index increased proportionally with the proportion of the presence of the contaminant. The DSC curves showed oxidation peaks and the spectra indicated low intensity signals and bands, but showed the presence of carbonyl and alkanes, oxidation products. However, lubricants contaminated with biodiesel in small quantities and exposed to natural environmental conditions have small signs of oxidative degradation, resulting in a shorter service life.
Keywords
lubricants, contamination, biodiesel, Oxidação, Blends
