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Bioresources and Bioprocessing

Table 4 Kinetic parameters for SFE of lees from pisco-making

From: Supercritical fluid extraction of polyphenols from lees: overall extraction curve, kinetic data and composition of the extracts

Parameter

20 MPa

35 MPa

t CER (h)

0.90 ± 0.01

0.71 ± 0.01

t FER (h)

3.22 ± 0.03

3.2 ± 0.1

M CER (10−8 kg extract/s)

16 ± 2

10 ± 1

Y CER (10−4 kg extract/kg solvent)

12.5 ± 0.1

8.0 ± 0.3

R CER (%, d.b.)

3.9 ± 0.4

1.9 ± 0.2

R TOTAL (%, d.b.)

10.5 ± 0.4

7.5 ± 0.2

  1. t CER duration of the constant extraction rate (CER) period, t FER duration of the falling extraction rate (FER) period, M CER mass transfer rate at t CER, Y CER solute mass ratio in the supercritical phase at the exit of the extractor at t CER, R CER extraction yield at t CER, R TOTAL global yield of the process
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