Amine solution?
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We are a viscose fiber plant that generates hydrogen sulfide gas. May I ask what type of amine solution is used before the sulfur plant to absorb hydrogen sulfide gas? What is the unit consumption?
Generally, MDEA is used as the absorbent
In typical sulfur recovery units, MDEA is used to absorb hydrogen sulfide, with the main consideration being selective absorption of H2S from among CO2 and H2S. It is not certain whether CO2 is present; if it is, MDEA is the preferred choice. If CO2 is absent, other absorbents can be considered, in which case selectivity is no longer an issue. Generally, the absorption capacity of MDEA is around 0.04 mol H2S per mol of MDEA.
It’s not feasible; what will you do after desorption? We can provide a dry-process solution
Hydrogen sulfide gas is accompanied by carbon disulfide waste gas; I’m not sure if this will work. After purification, it is used to produce acid.
Yes, that’s the case these days for many things
Is it possible to have an amine solution that absorbs only hydrogen sulfide and not carbon disulfide?
Theoretically, it does not exist, because both H2S and CO2 are acidic gases while amine solutions are alkaline; 100% selectivity is impossible, in my humble opinion.
It’s carbon disulfide, not carbon dioxide :)