In diesel hydrogenation, is the flash point of refined diesel related to the bottom temperature of the fractionation tower?
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In diesel hydrogenation, is the flash point of refined diesel related to the bottom temperature of the fractionation tower?
Yes, when the temperature at the bottom of the tower is not high enough, the light components cannot rise, resulting in a lower flash point; conversely, if the temperature is high enough, the flash point is higher
The flash point of refined diesel is controlled by the low temperature in the distillation tower... it’s the most direct method of control!
There is a relationship, but attention must also be paid to the tower top load
With constant top pressure and temperature, as well as constant feed temperature and top reflux, increasing the bottom temperature raises the flash point, while decreasing it lowers it.
The flash point is directly related to low temperature; under constant pressure and top temperature conditions, the higher the low temperature, the higher the flash point
Relevant: it has a low flash point and contains many light components. The bottom temperature or stripping steam can be adjusted. I think it’s also okay to appropriately reduce the tower pressure, so that the light components can rise more easily.