Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.5/1084
Título: Produção de biodiesel a partir de óleo de sementes de cardo
Autor: Sengo, Inês de Castro e
Orientador: Vicente, Maria Suzana Ferreira Dias
Pereira, Helena Margarida Nunes
Palavras-chave: biodiesel
cardoon oil
alcoholysis
fatty acid methyl esters
response surface methodology
transesterification
óleo de cardo
alcoólise
esteres metilicos de ácidos gordos
metodologia das superficies de resposta
transesterificação
Data de Defesa: 2008
Resumo: In this work, was investigated the use of oil from cardoon seeds (Cynara cardunculus, L.), for biodiesel production. The cardoon seeds contain 24% of oil, and 7.8% dry matter (dry basis). The oil had a free fatty acid content of 0.6%, an iodine index of 122, saponification value of 200, and cetane number of 46.14. The production of Fatty Acid Methyl Esters (FAME) was obtained by transesterification of crude cardoon oil with methanol in the presence of a catalyst (sodium methoxide), for 120 minutes, following a central composite rotatable design. The temperature ranged from 26ºC to 94ºC, the amount of sodium methoxide was between 0.12% and 2.5% (m/m), and the molar ratio methanol/oil was from 0.95:1 to 11:1. Modeling alcoholysis and optimization of reaction conditions were carried out at a lab-scale via Response Surface Methodology. The estimated yield in FAME (97%) was obtained after 30 minutes, at 52ºC, for a molar ratio of 6.4:1 and a 1.4% of catalyst. The lab-scale model validation obtained 94% of FAME after 30 minutes. The yield of 88% FAME was obtained at pilot scale after 90 minutes under the optimized conditions. After purification the biodiesel showed high quality according to DIN EN 14214.
Descrição: Mestrado em Engenharia Alimentar - Instituto Superior de Agronomia
URI: http://hdl.handle.net/10400.5/1084
Aparece nas colecções:BISA - Dissertações de Mestrado / Master Thesis

Ficheiros deste registo:
Ficheiro Descrição TamanhoFormato 
Produção de biodiesel a partir de óleo de sementes de cardo.pdfDissertação6,36 MBAdobe PDFVer/Abrir
Anexo - Resultados batches biodiesel DIN EN 14214.pdfAnexo61,87 kBAdobe PDFVer/Abrir


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