燃料エタノール
燃料エタノールの仕様
ここで紹介する仕様は米国のASTM method D4806-06c、”Standard Specification for Denatured Fuel Ethanol for Blending with Gasolines for Use as Automotive Spark-Ignition Engine Fuels"。
つまり、”自動車用点火内燃機関に使用されるガソリンブレンド用の変性燃料エタノールの標準仕様”ということになります。
ASTM D4806 for EtOH used for fuel
| Property | Limits |
| Ethanol, % v/v | 92.1 min. |
| Methanol, % v/v | 0.5 max. (5,000ppm) |
| Water, % v/v | 1.0 max. (10,000ppm) |
| Solvent-washed gum, mg/100mL | 5 max. (50ppm) |
| Chloride ion, mg/L | 40 max. (40ppm) |
| Sulfate ion, mg/L | 4 max. (4ppm) |
| Copper content, mg/kg | 0.1 max. (0.1ppm) |
| Acidity as acetic acid, % w/w | 0.007 max. (70ppm) |
| Appearance | Visibly free of suspended or precipitated contaminants |
| Denaturant, % v/v | Min. 1.96 and max. 4.76 natural gasoline, gasoline components or unleaded gasoline. |
0.1 % = 1,000 ppm
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