# US 8,784,532 B2 · Sorbent regeneration in a heated hollow-fiber assembly > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,784,532 B2 - Document ID: US8784532B2 - Status: Granted - Kind: B2 - Application number: 13/409,972 - Filed: 2012-03-01 - Published: 2012-11-15 - Granted: 2014-07-22 - Earliest claimed: 2011-03-03 - Assignees: Phillips 66 Company - Applicants: Imona C. Omole; George F. Schuette - Inventors: Imona C. Omole; George F. Schuette - Web page: https://patentgrep.com/patent/US8784532B2 ## CPC - B01J 20/28023: {Fibres or filaments (fibres or filaments in the form of membranes B01J20/28038; B01J20/28007 takes precedence)} - B01D 53/1425: {Regeneration of liquid absorbents} - B01D 53/1475: {Removing carbon dioxide} - B01D 53/22: by diffusion (manufacturing semi-permeable membranes B01D67/00; form, structure or properties of semi-permeable membranes B01D69/00; material for semi-permeable membranes B01D71/00) - B01D 53/229: {Integrated processes (Diffusion and at least one other process, e.g. adsorption, absorption)} - B01D 63/02: Hollow fibre modules - B01D 69/087: {Details relating to the spinning process} - B01J 20/2805: {Sorbents inside a permeable or porous casing, e.g. inside a container, bag or membrane} - F23J 15/04: using washing fluids {(scrubbers for removing solids only F23J15/022)} - B01D 2252/20405: Monoamines - B01D 2252/20484: with one hydroxyl group - B01D 2257/304: Hydrogen sulfide - B01D 2258/0283: Flue gases - B01D 2311/13: Use of sweep gas - B01D 2313/221: Heat exchangers - B01D 2313/36: Energy sources - F23J 2215/50: Carbon dioxide - Y02C 20/40: of CO2 - Y02E 20/32: Direct CO2 mitigation - B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS - 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) - F23J: REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES (combustion apparatus for consuming smoke or fumes, e.g. exhaust gases, F23G7/06) - Y02C: CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG] - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract Methods and apparatus relate to recovery of carbon dioxide and/or hydrogen sulfide from a gas mixture. Separating of the carbon dioxide, for example, from the gas mixture utilizes a liquid sorbent for the carbon dioxide. The liquid sorbent contacts the gas mixture for transfer of the carbon dioxide from the gas mixture to the liquid sorbent. The carbon dioxide then desorbs from the liquid sorbent using hollow-fiber contactors as a source of heat to liberate the carbon dioxide further separated by the hollow-fiber contactors from the liquid sorbent. ## Claims ### Claim 1 A method, comprising: providing hollow-fiber contactors in a desorption unit where the hollow-fiber contactors are formed by spinning a composition doped with a conducting agent; passing a sorbent loaded with at least one of carbon dioxide and hydrogen sulfide along the hollow-fiber contactors of the desorption unit; and heating the sorbent by at least one of applying a voltage across the hollow-fiber contactors heated by electrical resistance and directing at least one of microwave and radiofrequency energy toward the hollow-fiber contactors which are heated upon absorbing the energy, wherein the heating of the sorbent through thermal contact with the hollow-fiber contactors which are heated results in absorbed gases including at least one of the carbon dioxide and the hydrogen sulfide being released from the sorbent and transferred across walls of the hollow-fiber contactors through pores of the hollow-fiber contactors to regenerate the sorbent. ### Claim 2 (depends on 1) The method according to claim 1, wherein the heating includes the applying of the voltage across the hollow-fiber contactors. ### Claim 3 (depends on 1) The method according to claim 1, wherein the heating includes the directing of microwave energy toward the hollow-fiber contactors. ### Claim 4 (depends on 1) The method according to claim 1, further comprising preparing the hollow-fiber contactors by preheating a polymeric material to a temperature sufficient to carbonize the polymeric material forming the hollow-fiber contactors. ### Claim 5 A method, comprising: passing a sorbent loaded with at least one of carbon dioxide and hydrogen sulfide along the hollow-fiber contactors of the desorption unit; and heating the sorbent by at least one of applying a voltage across the hollow-fiber contactors heated by electrical resistance and directing at least one of microwave and radiofrequency energy toward the hollow-fiber contactors which are heated upon absorbing the energy, wherein the heating of the sorbent through thermal contact with the hollow-fiber contactors which are heated results in absorbed gases including at least one of the carbon dioxide and the hydrogen sulfide being released from the sorbent and transferred across walls of the hollow-fiber contactors through pores of the hollow-fiber contactors to regenerate the sorbent; wherein current passes through a network of conductive material that is at least one of graphitic and metallic within the hollow-fiber contactors. ### Claim 6 (depends on 1) The method according to claim 1, wherein the sorbent includes an aqueous amine. ### Claim 7 (depends on 1) The method according to claim 1, wherein the sorbent is loaded with the carbon dioxide. ### Claim 8 (depends on 1) The method according to claim 1, further comprising generating a vacuum to carry away for processing any of the carbon dioxide and the hydrogen sulfide transferred through the pores of the hollow-fiber contactors. ### Claim 9 (depends on 1) The method according to claim 1, further comprising passing a sweep gas along a first flow path separated by the hollow-fiber contactors from a second flow path of the sorbent, wherein the sweep gas carries away for processing any of the carbon dioxide and the hydrogen sulfide that are transferred through the pores of the hollow-fiber contactors. ### Claim 10 (depends on 1) The method according to claim 1, further comprising passing steam along a flow path in fluid communication with any of the carbon dioxide and the hydrogen sulfide that are transferred through the pores of the hollow-fiber contactors and then condensing the steam to provide separation of gases and liquids. ### Claim 11 (depends on 1) The method according to claim 1, wherein the heating raises temperature of the sorbent to above 100° C. ### Claim 12 (depends on 1) The method according to claim 1, wherein the heating alone raises temperature of the sorbent to above 100° C. by heat transfer from the hollow-fiber contactors. ### Claim 13 (depends on 1) The method according to claim 1, wherein the heating includes both the directing of the microwave energy toward the hollow-fiber contactors and the applying of the voltage across the hollow-fiber contactors. ### Claim 14 A method, comprising: transferring carbon dioxide from a gas mixture to a liquid sorbent; transferring the carbon dioxide from the liquid sorbent into a sweep gas through a hollow-fiber contactor by heating the hollow-fiber contactors wherein the hollow-fiber contactors are formed by spinning a composition doped with a conducting agent and this step of transferring the carbon dioxide from the liquid sorbent into a sweep gas further includes providing a heat source in addition to phase separation; and condensing the sweep gas to separate the carbon dioxide transferred to the sweep gas; wherein current passes through a network of conductive material that is at least one of graphitic and metallic within the hollow-fiber contactors. ### Claim 15 (depends on 14) The method according to claim 14, wherein the hollow-fiber contactors are heated by applying a voltage across the hollow-fiber contactors. ### Claim 16 (depends on 14) The method according to claim 14, wherein the hollow-fiber contactors are heated by directing microwave energy toward the hollow-fiber contactors. ### Claim 17 A method, comprising: transferring carbon dioxide from a gas mixture to a liquid sorbent; transferring the carbon dioxide from the liquid sorbent into a sweep gas through a hollow-fiber contactor by heating the hollow-fiber contactors wherein current passes through a network of conductive material that is at least one of graphitic and metallic within the hollow-fiber contactors and this step of transferring the carbon dioxide from the liquid sorbent into a sweep gas further includes providing a heat source in addition to phase separation; and condensing the sweep gas to separate the carbon dioxide transferred to the sweep gas.