Table 7.
Emergy analysis table for jatropha-based biodiesel.
| Stage | Type | Item | Data | Reference | Transformity (sej/unit) | Reference | Solar emergy (sej) |
|---|---|---|---|---|---|---|---|
| Plantation and reap | R | Sunlight (J) | 0.15E + 13 | Calculated | 1.00E + 00 | [5] | 0.15E + 13 |
| Rain geopotential (J) | 0.17E + 09 | Calculated | 4.70E + 04 | [5] | 0.80E + 13 | ||
| Rain chemical potential (J) | 0.17E + 10 | Calculated | 3.05E + 04 | [5] | 0.52E + 14 | ||
| Wind (J) | 0.28E + 10 | Calculated | 1.50E + 03 | [6] | 0.42E + 13 | ||
| N | Topsoil loss | 0.38E + 09 | Calculated | 7.40E + 04 | [5] | 2.81E + 13 | |
| F | Water (kg) | 10705350 | Statistics | 4.65E + 08 | [6] | 4.98E + 15 | |
| Nitrogen (kg) | 87 | Statistics | 2.40E + 13 | [5] | 2.09E + 15 | ||
| Phosphate (kg) | 174 | Statistics | 2.02E + 13 | [5] | 3.51E + 15 | ||
| Diesel (kg) | 255 | Estimated | 3.04E + 12 | [5] | 7.75E + 14 | ||
| Human labor (h) | 200 | Estimated | 1.1E + 12 | [5] | 2.2E + 14 | ||
| Jatropha management fee ($) | 225.56 | Estimated | 1.18E + 13 | [8] | 2.66E + 15 | ||
|
| |||||||
| Jatropha oil production | F | Electricity (J) | 4.91E + 08 | Statistics | 3.36E + 05 | [8] | 1.65E + 14 |
|
| |||||||
| Biodiesel production | F | MeOH (kg) | 391 | Statistics | 1.76E + 12 | [8] | 6.88E + 14 |
| NaOH (kg) | 8 | Statistics | 6.38E + 12 | [8] | 5.10E + 13 | ||
| H2O (kg) | 1000 | Estimated | 4.65E + 08 | [6] | 4.65E + 11 | ||
| H3PO4 (kg) | 6.84 | Statistics | 2.65E + 12 | [9] | 1.81E + 13 | ||
| Electricity (J) | 3.02E + 07 | Statistics | 3.36E + 05 | [8] | 1.01E + 13 | ||
| Human labor (h) | 800 | Estimated | 1.1E + 12 | [5] | 8.8E + 14 | ||