Do the technical requirements for ethanol gasoline for use in vehicles specified in standard GB18351 \"Ethanol Gasoline for Vehicles (E10)\\" prohibit the use of ethers?
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The technical requirements for ethanol gasoline (E10) specified in GB18351 \"Ethanol gasoline for vehicles (E10)\\" stipulate that the content (by mass fraction) of other organic oxygen compounds in ethanol gasoline, other than ethanol, shall not exceed 0.5%. Does this mean that etherification products represented by MTBE will be banned from use as raw materials for oil blending? Does it include ethyl tert-butyl ether (ETBE) and diisopropyl ether (DIPE)?
If Metbe doesn’t work well, then using ethanol-based gasoline will do; it’s not as if ethanol-based gasoline will be the only option in the future
Ethanol gasoline and conventional vehicle gasoline are two separate product categories, and the oxygen content in each of these products must be strictly controlled, primarily due to the impact of oxygen content on fuel combustion. In ethanol-blended gasoline, the oxygen content associated with ethanol is 32%, and the ethanol content itself is 10%; therefore, if no other oxygen-containing compounds are present, the total oxygen content in such gasoline will be 3.2%. Vehicle gasoline is required to have an oxygen content of 2.7%, which corresponds to an MTBE addition level of generally no more than 15%. Before blending, gasoline inevitably contains certain compounds. Ethanol-based gasoline imposes restrictions on oxidized compounds, and these restrictions apply not only to ethers. As a component used to increase the octane rating of gasoline, some oxygen must be added to meet the oxygen requirements for combustion. Since MTBE is not easily degraded and can contaminate groundwater, many countries in Europe and America no longer use it, opting instead for ethanol-based gasoline. That is why we are also gradually introducing ethanol-blended gasoline.