Table 3.
Properties of Parkia biglobosa biodiesel compared to standards of Europe and United States and Ghana Standard Authority.
| Property | Method | ASTM Std. D6751 | EN 14214 | Ghana Std. Authority | Determined value |
|---|---|---|---|---|---|
| Cetane number | ASTM D6890 | ≥47 | ≥51 | 47 min | 51 |
| Kinematic viscosity (mm2/s; 40°C) | ASTM D445 | 1.9–6.0 | 3.5–5.0 | 1.5–6.5 | 4.1 |
| Oxidative stability (h) | EN 14112 | ≥3 | ≥6 | — | 3.1 |
| Cloud point (°C) | GB/T510 | −15 to 16 | — | — | −1 |
| Pour point (°C) | GB/T3535 | −3 to 12 | — | +15 max | −1 |
| Flash point (°C) | ASTM D93 | ≥93 | ≥120 | 66 min | 155 |
| Sulphur content (%, w/w) | ASTM D4294 | ≤0.05 | 0.020 | 0.05 max | 0.004 |
| Ash content (%, w/w) | GB/T508 | ≤0.02 | ≤0.02 | 0.1 max | 0.019 |
| Acid value (KOH mg/kg) | ASTM D664-01 | ≤0.5 | ≤0.5 | 1.0 max | 0.456 |
| Water (mg/kg) | D6304 | ≤0.05 | ≤0.05 | 0.05 max | 0.07 |
| Density (20°C) | SH/T0248 | — | 860–900 | — | 868 |
| Iodine value (g/100) | EN 14111 | ≤120 | ≤120 | — | 137 |
| Copper strip corrosion (50°C, 3 h) | ASTM D 130-94 | ≤No.3a | ≤No.1a | — | 1a |
| Free glycerine (%, w/w) | EN 1405 | ≤0.02 | ≤0.020 | — | 0.002 |
| Total glycerine (%, w/w) | SH/T0796 | 0.24 | ≤0.25 | — | 0.16 |
Source: lab analysis (2021).