Does CO2 affect the absorption of hydrogen sulfide by ethanolamine?
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This post was last edited by liaifeng on 2018-7-28 10:34. Does carbon dioxide affect the absorption of hydrogen sulfide by ethanolamine? Compared to hydrogen sulfide, which one is easier to desorb?
Amine solutions absorb hydrogen sulfide more rapidly than carbon dioxide, but once the hydrogen sulfide concentration in the gas drops to ppm levels after absorption, the excess carbon dioxide is then absorbed. Therefore, the circulation volume of the amine solution should not be too high.
With different ethanolamine formulations, the medium that is absorbed preferentially also varies! However, in sulfur recovery units, priority is generally given to adsorbing hydrogen sulfide gas, with some carbon dioxide gas also being absorbed simultaneously!