Research Article
Effect of Selected Metal Contaminants on the Stability of Castor Oil Methyl Ester
Table 1
Physicochemical properties of castor oil and castor oil methyl ester.
| | Properties | CSO | COME | Biodiesel standard | Test method | | ASTM D6751 |
| | Specific gravity | | | 0.87–0.90 | ASTM D4502 | | Acid value (mg KOH/g oil) | | | 0.80 max. | ASTM D664 | | Iodine value (mg I2/100 g oil) | | | 120 max. | D-664-11 | | Peroxide value (meq/kg) | | | — | EN 14111 | | Cloud point (°C) | n/d | | — | ASTM D2500 | | Flash point (°C) | | | 130.0 min. | ASTM D93 | | Viscosity (40°C) (mm2/s) | | | 1.9–6.0 | ASTM D445 | | Cetane number | n/d | 51.6 | 47 min. | ASTM D613 |
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n/d: not determined.
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