Sulfur recovery
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How to reduce the absorption of carbon dioxide by the lean liquid (MDEA)? At present, the carbon dioxide content in the regenerated acidic gas produced by this unit is relatively high. We have tried to address this issue by adjusting the temperature of the lean liquid – specifically by reducing the temperature of the cooled lean liquid as well as the temperature of the dry gas entering the tower – but the effects were not significant. Are there any other solutions?/
Reducing the contact time – carbon dioxide absorption is a slow reaction. Try lowering the feed tray level in the absorption tower; adjusting the temperature has little effect on carbon dioxide absorption
It is generally done by controlling the height of entry into the tower, that is, by reducing the contact time inside the absorption tower