Naslov
Optimization of the supercritical CO2 extraction of oil from rapeseed using response surface methodology

Autori
Cvjetko, Marina ; Vidović, Senka ; Jokić, Stela ; Marić, Branimir ; Lepojević, Žika ; Radojčić Redovniković, Ivana

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
7th International Congress of Food Technologists, Biotechnologists and Nutritionists / - , 2011

Skup
7th International Congress of Food Technologists, Biotechnologists and Nutritionists

Mjesto i datum
Opatija, Hrvatska, 20.09.2011. - 23.09.2011

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
supercritical CO2 extraction; rapeseed oil; response surface methodology; kinetics; fatty acids

Sažetak
Rapeseed oil is one of the most widespread vegetable oils on the global market of edible fats, used in cooking, consumption and food production. Traditionally, oil from rapeseed is produced by a combined process using mechanical pressing of the seeds, followed by organic solvent extraction of residual oil in the press-cake. Offlate, there is a growing interest in alternative processes that can minimize the environmental impact, decrease the toxic residues, more efficiently use the sub-products and also produce higher quality foods. Supercritical fluid technology is a viable alternative to current extraction methods. Response surface methodology was employed to optimize the process parameters of the supercritical CO2 extraction of oil from rapeseed. The effects of pressure, temperature and extraction time on the oil yield were investigated. Mass transfer model was used to describe the extraction kinetic curves of rapeseed oil. The fatty acid composition of oil was determined by gas chromatography. Results showed that data were adequately fitted into the second-order polynomial model. The linear and quadratics of independent variables temperature, pressure and extraction time, had a significant effect on the oil yield. Optimal condition for oil yield within the experimental range of the variables studied was at 296.97 bar, 52.14 °C and 3.36 h. Under these conditions, the oil yield was predicted to be 28.27%. The fatty acid compositions of rapeseed oil extracted with supercritical CO2 and n-hexane were similar. The content of unsaturated fatty acids in oil obtained by supercritical CO2 was very high, 92.92%. Almost the same content was determined in oil obtained by n-hexane, 92.94%. The most dominant was monounsaturated oleic acid with 64.30% in oil obtained by n-hexane and 66.31% in oil obtained by supercritical CO2 extraction. Supercritical CO2 extraction was demonstrated to be a valuable alternative technology to traditional extraction techniques for extracting oil from rapeseed.

Izvorni jezik
Engleski

Znanstvena područja
Prehrambena tehnologija

POVEZANOST RADA