METHOD AND DEVICE FOR SEPARATING HYDROGEN SULFIDE AND HYDROGEN PRODUCTION SYSTEM USING THE SAME

摘要

The system includes adsorbent-packed towers 11 and 21 filled with H2S adsorbent which triethanolamine is supported by activated carbon. Mixed gas derived from a synthesis gas containing CO2 and H2S at about 40° C. is supplied to the adsorbent-packed towers 11 and 21 through a line. Valves 12 and 13 are opened, valves 22 and 23 are closed, valves 14 and 15 are closed, and valves 24 and 25 are opened to perform adsorption of H2S contained in the gas to be treated in the adsorbent-packed tower 11 in a dry state and to perform desorption of H2S in the adsorbent-packed tower 21. When adsorption of H2S contained in the gas to be treated is performed in the adsorbent-packed tower 21 and desorption of H2S is performed in the adsorbent-packed tower 11, the valves 12, 13, 24, and 25 are closed and the valves 22, 23, 14, and 15 are opened.

主权项

1. A method for separating hydrogen sulfide comprising:
an adsorption step in which a gas to be treated containing hydrogen sulfide and carbon dioxide is brought into contact with a hydrogen sulfide adsorbent, in which an amine compound is supported by a porous material, to selectively adsorb hydrogen sulfide; and a desorption step in which the hydrogen sulfide adsorbent after adsorption is heated to desorb hydrogen sulfide, wherein the amine compound is a tertiary amine, and the contact between the hydrogen sulfide adsorbent and the gas to be treated in the adsorption step is made in a dry state so that only hydrogen sulfide is selectively separated.