Optimization of Conversion of High Free Fatty Acid Jatropha curcas Oil to Biodiesel Using Response Surface Methodology

Table 2

CCD arrangement and responses for JCB yield.

Run	Parameter 1	Parameter 2	Parameter 3	Parameter 4	Experimental response	Predicted response
	𝐴: catalyst concentration; (%)	𝐵: temperature; (°C)	𝐶: time; (min)	𝐷: methanol/oil ratio	JCB yield; (%)	JCB yield; (%)
1	1	45	105	9	82.6	82.84
2	0	45	105	9	89.5	89.81
3	0.5	40	67.5	10.5	78.2	80.37
4	1.5	40	142.5	10.5	88.6	87.84
5	0.5	40	67.5	10.5	77.8	80.37
6	0.5	50	67.5	7.5	87.1	86.76
7	1.5	50	67.5	10.5	73.9	76.50
8	0.5	40	142.5	7.5	91	89.83
9	1	45	105	9	82.9	82.84
10	0.5	40	67.5	7.5	86.1	87.33
11	1	45	105	9	83.1	82.84
12	1	45	105	12	85.5	84.97
13	1	45	105	9	82.1	82.84
14	1	45	180	9	93.4	92.65
15	0.5	50	142.5	10.5	97.8	99.99
16	1	45	30	9	78.2	79.56
17	1.5	50	142.5	10.5	88.3	87.10
18	0.5	50	67.5	10.5	90	87.17
19	0.5	40	142.5	10.5	91.8	91.86
20	1.5	40	67.5	7.5	85.7	84.18
21	0.5	50	142.5	7.5	90	90.98
22	1	35	105	9	92.4	91.00
23	1.5	40	142.5	7.5	81.6	84.05
24	1.5	40	142.5	10.5	83.8	87.84
25	1	45	105	12	85.9	84.97
26	0.5	50	67.5	10.5	90.4	87.17
27	1.5	40	67.5	10.5	80	78.97
28	2	45	105	9	73	73.37
29	1	55	105	9	88.2	89.69
30	1.5	50	142.5	7.5	77	75.94
31	1.5	40	67.5	7.5	85.2	84.18
32	1	45	105	9	82.4	82.84
33	1	55	105	9	87.9	89.69
34	1.5	50	67.5	10.5	74.1	76.50
35	1.5	50	67.5	7.5	74.8	74.34
36	1.5	50	142.5	7.5	77.3	75.94
37	1.5	40	67.5	10.5	80.2	78.97
38	1	45	105	9	82.8	82.84
39	0.5	50	67.5	7.5	87.5	86.76
40	2	45	105	9	73.2	73.37
41	1	45	105	6	79.5	80.76
42	1.5	50	67.5	7.5	74.5	74.34
43	0	45	105	9	89.9	89.81
44	1.5	40	142.5	7.5	81.2	84.05
45	0.5	50	142.5	7.5	90.4	90.98
46	0.5	50	142.5	10.5	98.2	99.98
47	1	35	105	9	92.1	91.00
48	1	45	105	6	79.8	80.76
49	0.5	40	67.5	7.5	86.5	87.33
50	0.5	40	142.5	10.5	92.1	91.86
51	1	45	30	9	78.5	79.56
52	0.5	40	142.5	7.5	91.4	89.83
53	1.5	50	142.5	10.5	88.7	87.10
54	1	45	180	9	93.7	92.65