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Engineering ToolBox > Alternative Fuels Properties
Properties of some alternative fuels are indicated in the table below.
| Fuel | Cetane Number | Research Octane Number | Motor Octane Number | Density (lb/gal) | LHV (Btu/gal) | LHV (Btu/lb) | DEE (gal) | DEE (lb) |
| 100% Ethanol | 8 | 109 | 90 | 6.6 | 75600 | 11500 | 0.59 | 0.66 |
| E85, 85% Ethanol | 105 | 89 | 6.5 | 83600 | 12855 | 0.64 | 0.72 | |
| 10% Ethanol/gasoline | 96.5 | 86 | 6.1 | 111000 | 18000 | 0.86 | 1.39 | |
| 10% Ethanol/diesel | 45 | 7 | 123000 | 17500 | 0.95 | 1.01 | ||
| 100% Methanol | 5 | 109 | 89 | 6.7 | 56200 | 8400 | 0.44 | 0.48 |
| 100% Soy methyl-ester | 49 | 7.3 | 120200 | 16500 | 0.93 | 0.95 | ||
| B100, 100% Biodiesel | 54 | 117000 | 15800 | |||||
| B20, 20% Biodiesel, 80% petrodiesel | 46 | 18100 | ||||||
| #2 Diesel | 44 | 6.7-7.4 | 126000-130000 | 18000-19000 | 1 | 1 | ||
| #1 Diesel | 44 | 7.6 | 125800 | 16600 | 0.98 | 0.95 | ||
| Gasoline | 90-100 | 80-90 | 6 | 115400 | 19200 | 0.89 | 1.1 | |
| CNG - Compressed Natural Gas | < 0 | > 127 | 122 | 20400 | 1.17 | |||
| LNG - Liquified Natural Gas | < 0 | > 127 | 122 | 3.5 | 78000 | 22300 | 0.6 | 1.28 |
| LPG - Propane | 109 | 96 | 4.2 | 83600 | 19900 | 0.65 | 1.14 | |
| DME - Dimethyl ether | 55-60 | 5.6 | 74800 | 13600 | 0.58 | 0.78 |