Experimental and modeling study of supercritical CO2 extraction of Quercus cerris cork: Influence of ethanol and particle size on extraction kinetics and selectivity to friedelin
authors de Melo, MMR; Sen, A; Silvestre, AJD; Pereira, H; Silva, CM
nationality International
journal SEPARATION AND PURIFICATION TECHNOLOGY
author keywords Cork; Extraction curves; Friedelin; Modeling; Quercus cerris; Supercritical CO2 extraction
keywords EUCALYPTUS-GLOBULUS BARK; GRAPE SEED OIL; FLUID EXTRACTION; TRITERPENIC ACIDS; CARBON-DIOXIDE; EICHHORNIA-CRASSIPES; CHEMICAL-COMPOSITION; OPERATING-CONDITIONS; EXPERIMENTAL-DESIGN; ECONOMIC-EVALUATION
abstract Turkish oak (Quercus cerris) cork is an interesting source of friedelin, a bioactive triterpenoid. In this work, the supercritical fluid extraction of Q cerris cork was carried out in order to measure cumulative curves for both total and friedelin extraction yields (eta(total) and 17 eta(friedehn)) The influence of particle size and ethanol (CO2 modifier) content were assessed in the ranges of coarse particles to >80 mesh size, and 0-5 wt.%. The 14 experimental curves were modeled using the broken plus intact cells model, being attained global errors of only 4.43% (eta(total) and 4.25% (eta(friedehn)). Moreover, an analysis of the extraction periods allowed to get insights on the impact of the operating conditions on the duration and yields attained under the constant extraction rate (CER) period. Finally, an assessment of the selectivity to friedelin was also accomplished, being concluded that intermediate particle sizes (40-60 to 60-80 mesh) are preferable for uptaking friedelin, and also that the ethanol addition favors the competitive removal of this compound but only up to a limiting extent. In the whole, this article documents the influence of particle size and ethanol content can affect the production of friedelin-enriched extracts by supercritical fluid extraction, enhancing eta(total) up to 230% and eta(friedehn) up to 353%. (C) 2017 Elsevier B.V. All rights reserved.
publisher ELSEVIER SCIENCE BV
issn 1383-5866
isbn 1873-3794
year published 2017
volume 187
beginning page 34
ending page 45
digital object identifier (doi) 10.1016/j.seppur.2017.06.011
web of science category Engineering, Chemical
subject category Engineering
unique article identifier WOS:000409150700004
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journal analysis (jcr 2017):
journal impact factor 3.927
5 year journal impact factor 4.202
category normalized journal impact factor percentile 84.307
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