Synthesis of Biodiesel from Grape Seed Oil Using Ultrasound IrradiationAbstract: Biodiesel is a mixture of fatty esters obtained by transesterification of triglycerides with low molecular weight alcohols, such as methanol and ethanol. The transesterification reaction is slow at room temperature and therefore require the use of catalysts. In this work, conventional heating sources were replaced by ultrasound in the presence of KOH and methanol. The oil was obtained from grape seed, a byproduct of the wineries. The biodiesel was obtained in 97% yield, at the time of 30 minutes and the fatty acids of grape oil were characterized by gas chromatography and evaluated the parameters viscosity, iodine, and acidic saponification.Keywords: Biodiesel; ultrasound; grape seed oil; transesterification.
ResumoO biodiesel é uma mistura de ésteres graxos obtido por transesterificação de triglicerídeos com alcoóis de baixo peso molecular, como metanol e etanol. A reação de transesterificação é lenta a temperatura ambiente e, por isso, requer o uso de catalisadores. Neste trabalho, as fontes convencionais de aquecimento foram substituídas por ultrassom, na presença de KOH e metanol. O óleo foi obtido da semente de uva, um subproduto das vinícolas. O biodiesel foi obtido em 97 % de rendimento, no tempo de 30 minutos, e os ácidos graxos do óleo de uva foram caracterizados por cromatografia em fase gasosa, e avaliados os parâmetros viscosidade, índices de iodo, acidez e saponificação.Palavras-chave: Biodiesel; ultrassom; óleo de semente de uva; transesterificação.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.