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Produção de Biodiesel por catálise enzimática a partir de óleo de cardo
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Resumo(s)
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
Palavras-chave
cadoon oil biodiesel fatty acids methil esters lipase/acyltransferase transesterification
Contexto Educativo
Citação
Silva, Raquel Filipa Maia - Produção de biodiesel por catálise enzimática a partir de óleo de cardo. Lisboa: ISA, 2011