Reasons for the high alcohol content in the residue from atmospheric distillation columns
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Why does the residue from the atmospheric pressure column contain methanol? How to reduce the methanol content in the residue? Is it possible to achieve zero emissions?
For zero emissions, in addition to distillation control, the quality of your crude methanol also plays a role; a level of around 50PPM is relatively easy to control.:o
An increase in the methanol content in the residue may be caused by insufficient temperature control at the bottom of the atmospheric pressure tower, or by a sudden increase in the feed to the tower; these factors prevent methanol from evaporating, resulting in a higher methanol content in the residue. It is difficult to achieve zero emissions, but it should be possible to keep the level at the PPM range. It is necessary to appropriately increase the temperature at the bottom of the tower, stabilize the feed to the atmospheric pressure tower, and control the reflux ratio so that it is not too high.
The reasons have been analyzed on the third floor. Zero emissions are impossible; adding another tower won’t achieve zero emissions either. Also 50-100PPM