Range of gasoline hydrogenation light gasoline and heavy gasoline
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The boiling range of the light gasoline produced by the gasoline hydrogenation unit is 40 to 70 degrees, while that of the heavy gasoline is 90 to 190 degrees. I’m really confused about what happens to the components in the range of 70 to 90 degrees. I’m wondering whether these components change as a result of the pre-hydrogenation reaction, where low-sulfur compounds are converted into high-sulfur compounds
The separation effect is good; it’s normal for there to be some voiding. The dry point and initial boiling point are also related to the composition of the analyte; the presence of vacuum does not mean that the middle portion is gone
If the separation effect is good, Enneberg distillation (ASTM D86) will exhibit a vacuum drop of around 20°C, but this does not mean that there is no oil during this period. If you take a look at the data from simulated distillation using chromatography (ASTM D2887), you will see that there is oil present at all temperatures up to 20°C.
Enneberg distillation (ASTM D86) shows vacuum loss, and the true boiling point is continuous or overlapping
Just to ask, is the liquid fraction on the tray from this section?
I think the part of En’s distillation where vacuum is applied is mainly at the trays
In my opinion, the phenomenon of void formation can be understood as follows: 1. The separation effect is good； 2. The content of vacuum distillate in the raw materials is already low ； 3. The evacuated section undergoes internal circulation within the tower ； 4. Differences in analysis methods lead to this ； If there is no interruption in the boiling range of the raw material, the 20-degree vacuum loss is still related to the operating conditions; it is necessary to make adjustments to the operation by appropriately modifying the reflux rate and the temperatures of the upper and lower distillates, which should help to resolve the issue