@article{Cancela_Maceiras_Alfonsín_Sanchez_2015, title={Transesterification of waste frying oil under ultrasonic irradiation}, volume={4}, url={https://www.ecsdev.org/ojs/index.php/ejsd/article/view/274}, DOI={10.14207/ejsd.2015.v4n2p401}, abstractNote={<p class="03ABSTRAKT">This study investigates the effect of ultrasounds in conversion of waste frying oil into biodiesel. Many researchers have studied the use of ultrasounds in the biodiesel production from different feedstock; however, there are few studies focused on the biodiesel production from waste frying oil. In this research, ultrasound-assisted transesterification was carried out to convert the waste frying oil into biodiesel directly. The effect of different process parameters such as reaction time (30-90 min), amount of catalyst (0.5 -1% wt. NaOH) and temperature (20-40 ºC) were also analyzed to obtain the higher conversion. A methanol to oil molar ratio of 6:1, 0.5% amount of catalyst and 30 ºC was enough to complete the process in 60 min. The obtained results in this study confirm that that ultrasound-assisted transesterification was a fast and efficient method for biodiesel production from waste frying oil even if reaction temperature is low.</p><p class="06TRUPI"><em> </em></p><p class="06TRUPI">Keywords: ultrasound transesterification, waste frying oil, biodiesel.</p>}, number={2}, journal={European Journal of Sustainable Development}, author={Cancela, Ángeles and Maceiras, Rocío and Alfonsín, Víctor and Sanchez, Ángel}, year={2015}, month={Jun.}, pages={401} }