Amine solution foaming
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In the circulating hydrogen desulfurization tower, the temperature of the lean amine solution should be 5–7 degrees higher than that of the circulating hydrogen. If the temperature of the amine solution is too low, foaming may occur. I would like to ask experts: what are the consequences if the temperature of the lean amine solution is 7 degrees or more, even 10 degrees or more, higher than that of the circulating hydrogen?
If the temperature of the lean amine solution is too high, its absorption capacity decreases.
Excessively high amine solution temperature may carry hydrogen sulfide into the gas phase
The desulfurization efficiency will decrease. . . . . . . .
The temperature of the amine solution is 50 degrees, which is within the normal range. The temperature of the circulating hydrogen is below 40 degrees, resulting in a temperature difference of over 10 degrees. Could this lead to foaming? The temperature differences found so far are all between 5 and 7 degrees, with no indication of any significant harm
I’m telling you clearly: the temperature must not be too high (90 degrees), as high temperatures cause severe corrosion to the subsequent equipment.
The lean amine solution achieves good desulfurization effects at relatively low temperatures; above 10 degrees, it wastes heating energy
Light hydrocarbons in the recycled hydrogen are carried into the rich liquid, which hinders the operation of downstream solvent regeneration units; it also constitutes a contamination of the lean liquid, increasing reagent consumption
If the temperature of the lean amine solution is too high, it will affect its alkalinity, which in turn will impact its desulfurization efficiency