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Table 2 Central composite design matrix for Sargassum myriocystum biodiesel

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

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