Table 3.

CCD experimental design for the SFE of G. procumbens.

Run	Factor 1	Factor 2	Factor 3	CCD position
	A: Pressure (MPa)	B: Temperature (°C)	C: Water content in ethanol (%)
1	24	60	30	Factorial
2	24	70	30	Factorial
3	21	58	20	Axial
4	18	70	30	Factorial
5	24	60	10	Factorial
6	21	72	20	Axial
7	25	65	20	Axial
8	21	65	33	Axial
9	21	65	20	Center point
10	18	60	30	Factorial
11	21	65	20	Center point
12	24	70	10	Factorial
13	18	70	10	Factorial
14	18	60	10	Factorial
15	21	65	7	Axial
16	17	65	20	Axial
17	21	65	20	Center point
18	21	65	20	Center point
19	21	65	20	Center point
20	21	65	20	Center point