Abstract
Biodiesel is an environmentally friendly alternative for petro-diesel. However, its degradation caused by radical oxidative reactions generates free radicals that damage the mechanics of vehicles. Spin trapping is a powerful resource for quantifying the short-lived and unstable free radicals liberated in these reactions. In this work, the formation of free radicals in samples of corn, soybean, and commercial biodiesel was investigated via electron paramagnetic resonance (EPR) using the spin trapping technique. The samples were incubated using the spin trap α-Phenyl-N-tert-butylnitrone (PBN) and analyzed via X-band EPR at room temperature and under heating at 70 °C. The experimental and simulated absorption spectra of the entrapped radicals allowed both identifying the presence of a derivative of the hydroxyl radical and characterizing the degradation stages of biodiesel. This result was discussed and compared with the accelerated heating method. The analysis allowed to establish EPR as a suitable, quick, and inexpensive way of probing the degradation of biodiesel in comparison with standard methods.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
