Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.5/4073
Título: Produção de Biodiesel por catálise enzimática a partir de óleo de cardo
Autor: Silva, Raquel Filipa Maia da
Orientador: Dias, Suzana Ferreira
Gominho, Jorge
Palavras-chave: cadoon oil
biodiesel
fatty acids methil esters
lipase/acyltransferase
transesterification
Data de Defesa: 2011
Editora: ISA/UTL
Citação: Silva, Raquel Filipa Maia - Produção de biodiesel por catálise enzimática a partir de óleo de cardo. Lisboa: ISA, 2011
Resumo: This work aimed the production of biodiesel from cardoon seed oil (Cynara cardunculus L.) by enzymatic catalysis. The oil was extracted from cardoon seeds from two different crops, 2007 and 2009, and had a free fatty acid (FFA) content of 4.5% and 1.6%, respectively. The effect of FFA content in the enzymatic reaction kinetics was, therefore, investigated. The biodiesel (fatty acid methyl esters - FAME) were obtained by transesterification of crude oil whit methanol in a biphasic organic/aqueous system in the presence of a biocatalyst (enzyme). The lipase/acyltransferase from Candida parapsilosis was used in free form and immobilized in syntetic resins (Accurel MP1000 and Eupergit C) at different concentrations from 0.13% to 2.65% in the reaccion. Using an amount of 0.28% of enzyme in the free form, a maximum yield of 97% of FAME was obtained after 24h of reaction. In the production of fatty acid methyl esters using immobilized lipase/acyltransferase a lower yield of approximately 40% was obtained, but the recovery and reuse of the enzyme in different studies is possible. The FFA content in cardoon oils did not affect enzymatic catalysis
Descrição: Mestrado em Engenharia Alimentar - Instituto Superior de Agronomia
URI: http://hdl.handle.net/10400.5/4073
Aparece nas colecções:BISA - Dissertações de Mestrado / Master Thesis

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DISSERTAÇÃO - Raquel Silva - Versão Final.pdf2,15 MBAdobe PDFVer/Abrir


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