Optimization of algal methyl esters using RSM and evaluation of biodiesel storage characteristics

Bioresources and Bioprocessing

Table 2 Central composite design matrix for Sargassum myriocystum biodiesel

Run number	Oil:alcohol ratio (A)	Catalyst amount (B)	Time (C)	Temperature (D)	Experimental yield (%)	Predicted yield (%)
1	4	0.50	150	50	78.4	79.54
2	4	0.10	30	90	59.35	54.09
3	4	0.30	90	90	68.57	69.18
4	6	0.30	90	60	82.11	83.54
5	4	0.10	150	50	72.11	73.05
6	8	0.50	30	90	73.23	71.79
7	6	0.50	90	70	81.75	82.88
8	4	0.50	30	90	61.62	60.48
9	8	0.10	150	50	62.54	64.8
10	6	0.30	90	60	82.11	83.54
11	6	0.30	90	70	81.71	82.88
12	8	0.50	150	50	65.70	69.54
13	8	0.50	30	50	63.53	64.8
14	4	0.10	150	90	71.47	68.88
15	8	0.10	30	50	55.28	54.09
16	8	0.50	150	90	69.85	71.79
17	6	0.30	90	50	78.85	69.54
18	4	0.10	30	50	55.32	57.7
19	6	0.30	90	90	81.45	82.88
20	6	0.30	90	70	82.11	83.54
21	8	0.30	90	70	81.65	80.22
22	6	0.30	30	70	69.82	75.52
23	6	0.30	90	60	83.54	80.88
24	8	0.10	30	90	63.95	69.73
25	6	0.30	90	70	82.82	83.1
26	4	0.50	150	90	67.57	65.25
27	8	0.10	150	90	66.59	69.87
28	6	0.30	150	60	78.23	82.14
29	4	0.50	30	50	58.25	52.57
30	6	0.10	90	70	49.27	52.88