Biodiesel from oiticica oil (Licania rigida, Benth): production, thermogravimetric, and oxidative stability studies

• Autor(a) principal: Guimarães, A. K. V.
• Data de Publicação: 2018
• Outros Autores: Jesus, Anderson Alles de, Oliveira, Humberto Neves Maia de, Barros Neto, Eduardo Lins de, Gondim, Amanda Duarte, Chiavone Filho, Osvaldo
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UFRN
• Texto Completo: https://repositorio.ufrn.br/handle/123456789/44980
• topic: Oiticica oil; Biodiesel; Transesterification; Thermogravimetry; Oxidative stability

Oiticica is a feedstock with energetic potential for biofuel due to the presence of high oil content in its almond (54-60%). In this work, biodiesel from oiticica was produced by methyl transesterification using alkaline catalysts. Fatty acid methyl ester (FAME) obtained at 32 °C, with 1.5% of KOH and 2h of reaction time was higher (92%) than that with NaOH (85%). At the temperature of 50 °C, no difference between the catalysts was found, both resulting in a conversion of 91%. The best acid index was obtained with 1% of NaOH (0.40 mg KOH g-1 oil at 50 °C) and the best value of viscosity (9.61 mm2 s-1) with 1.5% of KOH at 50 °C. Oiticica oil and biodiesels exhibited high viscosities due the predominance of unsaturated compounds. Thermogravimetric analysis demonstrated to be a feasible technique, when compared to chromatography, in terms of time of analysis, conversion of the esters, and reagent consumption. All the biodiesels presented an oxidation temperature of 90 °C via Pressure Differential Scanning Calorimetry (PDSC)