Research Article
Effect of Operating Conditions on Pollutants Concentration Emitted from a Spark Ignition Engine Fueled with Gasoline Bioethanol Blends
Table 2
Test fuel properties.
| | Properties | Gasoline | Ethanol |
| | Chemical formula | C8.23H15.39 | C2H5OH | | Molecular weight (kg/kmol) | 114.15 | 46.07 | | Density (kg/m3 at 20°C) | 732 | 792 | | Oxygen (% wt.) | 0 | 35 | | Octane number (RON) | 86–94 | 105–108 | | Boiling point (°C) | 25–230 | 78.5 | | Latent heat of vaporization (kJ/kg) | 289 | 854 | | Autoignition temperature (°C) | 257 | 423 | | A/F ratio (by mass) | 14.7 | 9 | | Lower heating value (MJ/kg) | 43.8 | 26.7 | | Flash point | −43 | 9 |
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