Thermal characterization of oil and biodiesel from oiticica (<Emphasis Type="Italic">Licania rigida</Emphasis> Benth) |
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Authors: | F L Macedo R A Candeia L L M Sales M B Dantas A G Souza M M Conceição |
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Institution: | 1.Centro de Educa??o e Saúde,Universidade Federal de Campina Grande,Cuité,Brazil;2.Centro de Forma??o de Professores,Universidade Federal de Campina Grande,Cajazeiras,Brazil;3.Laboratório de Combustíveis e Materiais,Universidade Federal da Paraíba,Jo?o Pessoa,Brazil |
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Abstract: | Searching for other alternative sources, which are not part of the food chain, and which are able to supply the biofuel market
is a promising option. In this context, it has been searched to investigate the oiticica oil, approaching its availability
to the biodiesel synthesis, as well as its thermal stability. Few works retreat parameters such as: the optimization of the
biodiesel synthesis, its physical–chemical properties, and thermal parameters etc. The characterization results revealed
that the oil showed very high kinematic viscosity, and acidity value around 13 mg KOH/g, requiring a pre-treatment. To reduce
the acid in the oil, it has been done the esterification of oil, which was studied in different molar ratios oiticica oil/ethanol
(1:9) and 2.0% catalyst, in order to get the best reduction the index of acidity. The lowest level of acidity of the oil obtained
after the esterification was 4.4 mg KOH/g. The reaction rate for the synthesis of biodiesel, compared to the initial mass
of oiticica oil ester was 85%. This income can be overcome by pursuing an even smaller reduction of acid value of biodiesel
oiticica. The acid value of biodiesel was 1.8 mg KOH/g. The results have revealed that the oiticica oil and biodiesel are
stable at 224 and 179 °C, respectively. |
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