Saponification of Jatropha curcas Seed Oil: Optimization by D-Optimal Design

Table 2

D-optimal design optimization of J. curcas seed oil saponification and response for FFA%.

Run	Coded independent variable levels			Response
no.	Ethanolic KOH (M, 𝑋1)	Temperature (°C, 𝑋2)	Time (h, 𝑋3)	FFA (%, 𝑌)
1	2.00	50	1.5	97.1
2	2.00	70	2.5	102.4
3	1.00	50	1.5	53.9
4	1.00	60	2.0	64.6
5	2.00	50	2.5	97.5
6	1.75	65	2.0	102.2
7	2.00	50	2.5	99.1
8	1.00	50	2.5	60.8
9	1.00	70	2.5	77.1
10	1.50	60	2.5	97.4
11	1.00	50	2.5	67.9
12	2.00	60	1.5	100.3
13	1.00	50	1.5	55.1
14	1.00	70	1.5	70.0
15	1.50	50	2.0	96.72
16	2.00	70	1.5	100.4
17	1.00	70	2.5	72.4
18	1.50	70	1.5	99.2