Why does the upgrade of oil standards reduce the octane rating of finished oils?
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When moving from National Standard 4 to National Standard 5, the octane rating of gasoline decreased. With National Standard 6 on the horizon, will the octane rating decrease further? What methods do refineries use to adjust octane ratings? I would like to ask what the specific reasons for the decrease in octane rating are Thank you all!
Processes such as desulfurization in the device can reduce the octane rating; it is difficult to maintain this octane rating in accordance with the National IV standards, and the cost of blending is relatively high. I guess the compression ratio of a car can still accommodate certain fluctuations in octane rating
Hydrofining causes some of the olefins to saturate, resulting in a decrease in octane number
If implemented according to the original design, it’s likely that few will meet the requirements – does that mean they all have to close? Also, if we follow the original labeling requirements, the initial investment required is definitely not small at all! Therefore, a compromise solution is adopted to ensure the maximum performance of the engine under existing conditions.
Do any experts have any data related to cost accounting of this kind? It’s good to get some general trends by throwing out ideas to stimulate further discussion. Compared to National V fuel, National VI fuel features a reduced content of olefins and aromatics; what impacts will this have on the octane rating and production?
Which part has a greater impact on octane rating, the hydrogenation section or the desulfurization section? At present, I believe that a decrease in the content of hydrogenated olefins will have a significant impact on the octane rating
I think the refining and desulfurization process will reduce the octane rating. Refineries typically refine atmospheric and vacuum naphtha to remove sulfur from it, mix it with high-octane components, and then add antiknock agents in order to produce gasoline of the desired octane rating, thereby **saving petroleum resources**. It’s the ordinary people who are harmed
Why does the saturation of olefins affect octane rating? Could you provide a detailed analysis?
The hydrocarbons that make up gasoline contribute differently to its octane rating; when alkenes with the same structure are saturated, the octane rating of the corresponding alkanes decreases
The olefin content in gasoline standards has been reduced, and a decrease in olefin content leads to a lower octane rating
Gasoline is a mixture whose components include the following types: straight-chain hydrocarbons with carbon chains ranging from C4 to C12； Naphthenes, aromatics. Among them, olefins and aromatic hydrocarbons can be used to increase the octane rating of gasoline. In addition to olefins and aromatic hydrocarbons, the octane rating of gasoline can also be increased by adding anti-knock agents. Upgrading oil products requires reducing sulfur and olefin content, which leads to a decrease in octane rating.