# US 2014/0360368 A1 · Method and device for separating hydrogen sulfide and hydrogen production system using the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0360368 A1 - Document ID: US20140360368A1 - Status: Published application - Kind: A1 - Application number: 14/363,423 - Filed: 2012-10-29 - Published: 2014-12-11 - Earliest claimed: 2011-12-08 - Assignees: Kawasaki Jukogyo Kabushiki Kaisha - Applicants: Kawasaki Jukogyo Kabushiki Kaisha - Inventors: Takashi Nakamoto; Toshinori Muraoka; Shigenobu Okajima; Norihiko Kumada; Masatoshi Hirokawa; Takatoshi Shoji - Web page: https://patentgrep.com/patent/US20140360368A1 ## CPC - C01B 3/508: by using hydrogen storage media (reversible storage of hydrogen C01B3/0005) - B01D 53/02: by adsorption, e.g. preparative gas chromatography {(solid sorbent compositions B01J20/00, preparation of inorganic compounds or elements C01)} - B01D 53/0462: {Temperature swing adsorption} - B01D 53/52: Hydrogen sulfide - B01D 53/82: with stationary reactants - C01B 3/56: by contacting with solids; Regeneration of used solids - C01B 17/167: {Separation} - C01B 32/50: Carbon dioxide - B01D 2252/20431: Tertiary amines - B01D 2253/20: Organic adsorbents - B01D 2253/25: Coated, impregnated or composite adsorbents - B01D 2256/16: Hydrogen - B01D 2257/304: Hydrogen sulfide - B01D 2257/504: Carbon dioxide - B01J 2219/00: Chemical, physical or physico-chemical processes in general; Their relevant apparatus - C01B 2203/043: Regenerative adsorption process in two or more beds, one for adsorption, the other for regeneration - C01B 2203/0475: the impurity being carbon dioxide - C01B 2203/0485: the impurity being a sulfur compound - C01B 2203/146: At least two purification steps in series - C01B 2203/147: Three or more purification steps in series - Y02C 20/40: of CO2 - C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C} - B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28) - B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS - Y02C: CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG] ## Abstract 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. ## Claims ### Claim 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. ### Claim 2 (depends on 1) The method for separating hydrogen sulfide according to claim 1, wherein the tertiary amine is a tertiary alkanolamine. ### Claim 3 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. ### Claim 4 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: a plurality of adsorbent-packed towers filled with the hydrogen sulfide adsorbent; a plurality of means for supplying the gas to be treated to the adsorbent-packed towers, respectively, to bring the hydrogen sulfide adsorbent and the gas to be treated into contact with each other; and a plurality of 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 towers, respectively, wherein the amine compound is a tertiary amine, and the contact between the hydrogen sulfide adsorbent and the gas to be treated in each of the adsorbent-packed towers is made in a dry state, and wherein the gas to be treated is supplied from the gas supplying means to one or more of the adsorbent-packed towers, respectively, to selectively adsorb hydrogen sulfide, and the heated gas flow is supplied from the heated gas flow supplying means to another of the adsorbent-packed towers or one or more of the other adsorbent-packed towers, respectively, to desorb hydrogen sulfide. ### Claim 5 (depends on 3) The device for separating hydrogen sulfide according to claim 3, wherein the tertiary amine is a tertiary alkanolamine. ### Claim 6 (depends on 4) The device for separating hydrogen sulfide according to claim 4, wherein the tertiary amine is a tertiary alkanolamine. ### Claim 7 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: the hydrogen sulfide separation device according to claim that selectively separates hydrogen sulfide from the raw material gas; 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. ### Claim 8 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: the hydrogen sulfide separation device according to claim that selectively separates hydrogen sulfide from the raw material gas; 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. ### Claim 9 (depends on 7) The hydrogen production system according to claim 7, wherein the hydrogen sulfide separation device and the carbon dioxide separation device are provided on a high-pressure gas treatment line. ### Claim 10 (depends on 8) The hydrogen production system according to claim 8, wherein the hydrogen sulfide separation device and the carbon dioxide separation device are provided on a high-pressure gas treatment line. ### Claim 11 (depends on 3) 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 carbon dioxide separation device that separates hydrogen sulfide and carbon dioxide from the raw material gas; 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; and the hydrogen sulfide separation device according to claim 3 that is provided downstream of the carbon dioxide separation device to selectively separate hydrogen sulfide from a gas containing hydrogen sulfide and carbon dioxide separated by the carbon dioxide separation device. ### Claim 12 (depends on 4) 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 carbon dioxide separation device that separates hydrogen sulfide and carbon dioxide from the raw material gas; 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; and the hydrogen sulfide separation device according to claim 4 that is provided downstream of the carbon dioxide separation device to selectively separate hydrogen sulfide from a gas containing hydrogen sulfide and carbon dioxide separated by the carbon dioxide separation device. ### Claim 13 (depends on 11) The hydrogen production system according to claim 11, wherein the carbon dioxide separation device is provided on a high-pressure gas treatment line and the hydrogen sulfide separation device is provided on an ordinary-pressure gas treatment line. ### Claim 14 (depends on 12) The hydrogen production system according to claim 12, wherein the carbon dioxide separation device is provided on a high-pressure gas treatment line and the hydrogen sulfide separation device is provided on an ordinary-pressure gas treatment line. ### Claim 15 (depends on 7) The hydrogen production system according to claim 7, wherein the carbon dioxide separation device separates carbon dioxide using a carbon dioxide adsorbent in which an amine compound is supported by a porous material. ### Claim 16 (depends on 8) The hydrogen production system according to claim 8, wherein the carbon dioxide separation device separates carbon dioxide using a carbon dioxide adsorbent in which an amine compound is supported by a porous material. ### Claim 17 (depends on 7) The hydrogen production system according to claim 7, wherein combustible off-gas after separation of hydrogen by the hydrogen purification device is used to generate a heated gas flow for desorbing hydrogen sulfide from the hydrogen sulfide adsorbent in the hydrogen sulfide separation device. ### Claim 18 (depends on 8) The hydrogen production system according to claim 8, wherein combustible off-gas after separation of hydrogen by the hydrogen purification device is used to generate a heated gas flow for desorbing hydrogen sulfide from the hydrogen sulfide adsorbent in the hydrogen sulfide separation device. ### Claim 19 (depends on 15) The hydrogen production system according to claim 15, wherein combustible off-gas after separation of hydrogen by the hydrogen purification device is used to generate a heated gas flow for desorbing carbon dioxide from the carbon dioxide adsorbent in the carbon dioxide separation device. ### Claim 20 (depends on 16) The hydrogen production system according to claim 16, wherein combustible off-gas after separation of hydrogen by the hydrogen purification device is used to generate a heated gas flow for desorbing carbon dioxide from the carbon dioxide adsorbent in the carbon dioxide separation device. ### Claim 21 (depends on 7) The hydrogen production system according to claim 7, comprising a carbon dioxide recovery device for recovering finally-separated carbon dioxide. ### Claim 22 (depends on 8) The hydrogen production system according to claim 8, comprising a carbon dioxide recovery device for recovering finally-separated carbon dioxide.