Table 2 The experimental data fitted by Esquivel and Brunner models.

From: Influence of particle size in supercritical carbon dioxide extraction of roselle (Hibiscus sabdariffa) on bioactive compound recovery, extraction rate, diffusivity, and solubility

Run

Temp, °C

P, Mpa

FCO2, ml/min

Dp, µm

Global Yield, %

Esquivel

Brunner

k

y

k/y (mg/s)

%AARD

R2

k

1/y

k/y (mg/s)

%AARD

R2

1

40

10

4

250 < dp < 355

7.91

1.13E + 04

9.41E + 01

8.32E−03

3.00

1.00

1.88E−04

4.46E + 01

8.37E−03

3.15

1.00

2

355 < dp < 425

6.90

3.46E + 04

2.46E + 02

7.12E−03

1.26

1.00

1.53E−04

4.87E + 01

7.47E−03

3.67

0.99

3

425 < dp < 500

6.37

6.16E + 05

3.50E + 03

5.69E−03

0.18

1.00

1.18E−04

5.35E + 01

6.31E−03

4.01

1.00

4

60

10

4

250 < dp < 355

7.94

8.96E + 03

1.21E + 02

1.35E−02

12.70

0.99

8.90E−05

1.31E + 02

1.16E−02

10.23

0.99

5

355 < dp < 425

7.75

9.12E + 03

1.17E + 02

1.29E−02

14.40

0.98

9.75E−05

1.16E + 02

1.13E−02

12.30

0.99

6

425 < dp < 500

6.79

1.11E + 10

8.36E + 07

7.53E−03

8.08

1.00

6.63E−05

1.27E + 02

8.45E−03

9.76

0.99

7

40

30

4

250 < dp < 355

11.97

1.13E + 04

9.41E + 01

8.32E−03

3.99

1.00

1.88E−04

4.46E + 01

8.37E−03

4.15

1.00

8

355 < dp < 425

11.57

1.50E + 04

1.05E + 02

7.00E−03

0.56

1.00

1.18E−04

5.92E + 01

6.96E−03

0.63

1.00

9

425 < dp < 500

9.15

3.65E + 10

1.88E + 08

5.15E−03

3.13

1.00

3.94E−05

1.41E + 02

5.55E−03

4.35

1.00

10

60

30

4

250 < dp < 355

8.99

2.91E + 04

2.45E + 02

8.42E−03

7.53

0.99

7.11E−05

1.19E + 02

8.45E−03

7.72

0.99

11

355 < dp < 425

8.43

1.09E + 04

9.83E + 01

9.00E−03

13.15

0.99

1.94E−04

4.78E + 01

9.28E−03

13.91

0.98

12

425 < dp < 500

6.59

1.97E + 08

1.03E + 06

5.22E−03

8.70

1.00

1.18E−04

5.20E + 01

6.13E−03

11.95

0.99

Average

8.36

3.99E + 09

2.27E + 07

0.01

0.99

6.39

0.00

82.00

0.01

7.15

0.99