Supercritical CO2 extraction of lyophilized Açaí (Euterpe oleracea Mart.) pulp oil from three municipalities in the state of Pará, Brazil

[Display omitted] •The highest global yield (57.06 ± 0.03%) was obtained at the 70 °C/490 bar condition for Chaves.•The oleic acid content ranged from 61.64 to 64.19% for all conditions.•The highest oil solubility was 0.108 g oil/g CO2 at 70 °C/490 bar condition.•Bioactive compounds concentrations i...

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Bibliographic Details
Published in:	Journal of CO2 utilization Vol. 31; pp. 226 - 234
Main Authors:	Silva, Marcilene P., Cunha, Vania Maria B., Sousa, Sérgio Henrique B., Menezes, Eduardo G. Ortiz, Bezerra, Priscila do Nascimento, Farias Neto, João T. de, Filho, Geraldo N.R., Araújo, Marilena E., Carvalho Jr, Raul N. de
Format:	Journal Article
Language:	English
Published:	Elsevier Ltd 01-05-2019
Subjects:	Açaí (Euterpe oleracea) Bioactive compounds Fatty acids Solubility Triacylglycerols Bioactive compounds Fatty acids Açaí (Euterpe oleracea) Triacylglycerols Solubility
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Summary:	[Display omitted] •The highest global yield (57.06 ± 0.03%) was obtained at the 70 °C/490 bar condition for Chaves.•The oleic acid content ranged from 61.64 to 64.19% for all conditions.•The highest oil solubility was 0.108 g oil/g CO2 at 70 °C/490 bar condition.•Bioactive compounds concentrations increased in lyophilized pulp after extractions.•The highest antioxidant capacity, 140.70 TEAC and 1533.45 DPPH (μM Trolox/g) was for Chaves. In this work supercritical CO2 was applied to extract lyophilized açaí (Euterpe oleracea) pulps (LAP) oil from three municipalities in the state of Pará, Brazil: Anajás, Chaves, and Saracá to evaluate the effects of temperature, pressure, and geographically localization on the global yield and fatty acid composition. The operational conditions were: 50 °C/350 bar, 60 °C/420, and 70 °C/490 bar. The bioactive compounds contents present in the pulp before and after the extraction were determinate. The highest yields (57.06%) were obtained of LAP oil from Chaves.The effect on fatty acid composition of LAP oil was more accentuated by geographically location than CO2-SE operating conditions. The triacylglycerols (TAGs) composition of the açai oil samples were predicted based on the fatty acid profile. The main TAGs predicted, representing more than 85% of the total composition, are OOO, POO, OLiO, PLiO and POP. The solubility values of açaí oil predicted applying the Peng-Robinson equation of state at the same operating conditions of global yield experiments showed the same behavior of the global yields that increases as pressure and temperature increases. After the extractions, there was an increase of bioactive compounds concentrations and antioxidant capacity in the açaí lyophilized pulp from all municipalities.
ISSN:	2212-9820 2212-9839
DOI:	10.1016/j.jcou.2019.03.019