Research Article
Response Surface Methodology for Biodiesel Production Using Calcium Methoxide Catalyst Assisted with Tetrahydrofuran as Cosolvent
Table 8
Biodiesel properties.
| | Parameters | Testing method | Specification | WCO biodiesel |
| | Viscosity at 40°C (cSt) | ASTM D 445 | 1.9–6.0 | 4.78 | | Density at 15°C (g/cm3) | EN ISO 3675 | 0.86–0.90 | 0.89 | | Acid value (mg KOH/g) | ASTM D 664 | 0.80 max | 0.53 | | Water and sediment (v%) | ASTM D 2709 | 0.05 max | <0.05 | | Methyl ester purity (wt%) | EN 14103 | ≥96.5 | 97.13 |
|
|
