Reaction chemistry of H₂S absorption

All amines react in a similar fashion with H2S. H2S is transferred quickly into the liquid phase, where it forms bisulfide, protonating an amine in the process. These reactions are fast as illustrated in the following reaction table.

Even though the effect is not as strong as in CO2 removal, the absorption of H2S can also be impacted through selection of the type and concentration of amines.

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