Publicação
Produção de biodiesel a partir de óleo de sementes de cardo
| dc.contributor.advisor | Vicente, Maria Suzana Ferreira Dias | |
| dc.contributor.advisor | Pereira, Helena Margarida Nunes | |
| dc.contributor.author | Sengo, Inês de Castro e | |
| dc.date.accessioned | 2009-07-07T15:22:11Z | |
| dc.date.available | 2009-07-07T15:22:11Z | |
| dc.date.issued | 2008 | |
| dc.description | Mestrado em Engenharia Alimentar - Instituto Superior de Agronomia | en |
| dc.description.abstract | 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. | en |
| dc.description.sponsorship | Este trabalho foi realizado no âmbito do projecto “Energy Crops: Possibilities of Large Scale Implementation in the Atlantic Space", programa de iniciativa comunitária INTERREG III B “ESPAÇO ATLÂNTICO”, Janeiro de 2004-Dezembro de 2007, da responsabilidade da Professora Catedrática Helena Pereira (ISA). | en |
| dc.identifier.uri | http://hdl.handle.net/10400.5/1084 | |
| dc.language.iso | por | en |
| dc.subject | biodiesel | en |
| dc.subject | cardoon oil | en |
| dc.subject | alcoholysis | en |
| dc.subject | fatty acid methyl esters | en |
| dc.subject | response surface methodology | en |
| dc.subject | transesterification | en |
| dc.subject | óleo de cardo | en |
| dc.subject | alcoólise | en |
| dc.subject | esteres metilicos de ácidos gordos | en |
| dc.subject | metodologia das superficies de resposta | en |
| dc.subject | transesterificação | en |
| dc.title | Produção de biodiesel a partir de óleo de sementes de cardo | en |
| dc.type | master thesis | |
| dspace.entity.type | Publication | |
| rcaap.rights | openAccess | en |
| rcaap.type | masterThesis | en |
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