Research Article
Biodiesel Production Using Supercritical Methanol with Carbon Dioxide and Acetic Acid
Table 4
Results of L9 (34) orthogonal array experiments on fatty acid methyl ester (FAME) and glycerol contents of biodiesel production samples.
| Run | FAME content | Glycerol content | Test 1 (%) | Test 2 (%) | AVG | SD | S/N ratio (db) | Test 1 (%) | Test 2 (%) | AVG |
| 1 | 35.73 | 38.22 | 38.22 | 3.51 | 31.59 | 3.21 | 3.67 | 3.44 | 2 | 51.1 | 51.47 | 51.47 | 0.52 | 34.23 | 5.29 | 5.59 | 5.44 | 3 | 61.12 | 60.44 | 60.44 | 0.97 | 35.62 | 5.27 | 5.52 | 5.39 | 4 | 85.97 | 86.49 | 86.49 | 0.74 | 38.74 | 5.44 | 5.64 | 5.54 | 5 | 85.17 | 82.35 | 82.35 | 4 | 38.3 | 5.63 | 6.08 | 5.85 | 6 | 72.3 | 72.46 | 72.46 | 0.22 | 37.2 | 6.85 | 7.19 | 7.02 | 7 | 85.27 | 82.73 | 82.73 | 3.59 | 38.34 | 6.01 | 6.39 | 6.2 | 8 | 62.05 | 63.38 | 63.38 | 1.88 | 36.03 | 6.79 | 7.17 | 6.98 | 9 | 71.88 | 70.45 | 70.45 | 2.03 | 36.95 | 6.63 | 7.01 | 6.82 | CT | 98.17 | 97.48 | 97.83 | 0.49 | 39.81 | 6.74 | 7.22 | 6.98 |
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AVG: average; SD: standard deviation; S/N: signal-to-noise ratio; CT: confirmation test.
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