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 system for producing hydrogen from a raw material gas that is a gas to be treated containing hydrogen sulfide, carbon dioxide, and hydrogen, the system comprising:
a hydrogen sulfide separation device a carbon dioxide separation device that is provided downstream of the hydrogen sulfide separation device to separate carbon dioxide from a gas obtained by removing hydrogen sulfide from the raw material gas; and a hydrogen purification device that is provided downstream of the carbon dioxide separation device to separate hydrogen from a gas obtained by removing hydrogen sulfide and carbon dioxide from the raw material gas: wherein the hydrogen sulfide separation device is a device for selectively separating hydrogen sulfide from a gas to be treated containing hydrogen sulfide and carbon dioxide using a hydrogen sulfide adsorbent in which an amine compound is supported by a porous material, the device comprising: an adsorbent-packed tower filled with the hydrogen sulfide adsorbent; means for supplying the gas to be treated to the adsorbent-packed tower to bring the hydrogen sulfide adsorbent and the gas to be treated into contact with each other; and means for supplying a heated gas flow for desorbing hydrogen sulfide from the hydrogen sulfide adsorbent after adsorption of hydrogen sulfide to the adsorbent-packed tower, wherein the amine compound is a tertiary amine, and the contact between the hydrogen sulfide adsorbent and the gas to be treated in the adsorbent-packed tower is made in a dry state.