by Prof. E.
Schrimpff, FH Weihenstephan, GermanyComparison of pure plant oil and bio diesel as fuel
by Prof. E.
Schrimpff, FH Weihenstephan, Germany
| Plant oil (SVO) | biodiesel (BD) | |
| 1) Physical characteristics: | ||
| physical density | 0,90 - 0,92 | 0,88 |
| viscosity | 60 - 80 | 7 - 8 |
| ignition point | > 220 | 135 |
| 2) Chemical characteristics: | ||
| phosphate mg/kg | < 15 | < 15 |
| sulphur mg/kg | < 10 | < 10 |
| chem. reaction | neutral, very low | hygroscopic, solvent, fast reaction |
| 3) Production: | ||
| principle | decentralized small oil expellers | central, big industrial units |
| chemical compounds needed | - | methanol, potassium hydroxyd |
| energy input | 12 % | 29 % |
| 4) Transport / storage | no risk | small risk |
| 5) Environment | ||
| biol. degradation | very fast | delayed |
| danger of water pollution | no | small |
| human toxicity | regularly no or small | toxic |
| circuit of matter | complete | difficult to realize |
| 6) Social acceptability | ||
| strategy | small, decentralized | big, central |
| logistics | simple | complex |
| transportation | short distances | long distances |
| vulnerability | small | higher |
| regional income generation | high | low |
| 7) Costs | ||
| fuel production | 0,25 - 0,40 | 0,45 - 0,60 US$ |
| fuel prices | 0,45 - 0,55 | 0,70 - 0,85 US$ |
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modification 09.07.02 by
