Ethanol gasoline and methanol gasoline
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What are the differences in quality and performance between ethanol-blended gasoline and methanol-blended gasoline?
I’m not too sure about ethanol-based gasoline; methanol-based gasoline has very high quality
Methanol-blended gasoline has high power, while ethanol-blended gasoline has lower power than lead-free gasoline； In terms of production costs, methanol gasoline is less expensive than lead-free gasoline, and even less so than ethanol gasoline. However, due to the high corrosiveness of methanol, **ethanol gasoline is now being widely promoted**. In August, Shaanxi **announced that it planned to roll out methanol gasoline on a nationwide scale in October, but no further news on this matter appeared later; it’s unclear what happened with those plans, or whether they were abandoned.
Most of the corrosion problems associated with methanol are due to the high water content in industrial methanol nowadays. These corrosion issues have been largely resolved; in Shanxi, not only methanol-blended gasoline is in use, but vehicles powered purely by methanol have also been in operation for many years. Standards for methanol-blended gasoline will be established next year, in July or August
It needs to be considered from several aspects: 1. Octane rating: Both methanol and ethanol have high octane ratings, exceeding 100. 2. Toxicity: Methanol is highly toxic, making it less safe to use compared to ethanol. 3. Intermiscibility with gasoline: Methanol performs worse than ethanol; ethanol can be mixed with gasoline over a wide range of proportions, while methanol tends to cause stratification when used in large amounts. 4. Impact on engines and fuel systems: Methanol has a more severe impact than ethanol. 5. Energy density: Methanol has a lower energy density per unit weight than ethanol. There are other factors that haven’t been considered here; feel free to add them. Additionally, specific data for the aspects mentioned above are available; I won’t list them all here. Those who are interested can look them up on their own