# US 2025/0375730 A1 · Membrane volatile compound capture in post-combustion carbon capture > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2025/0375730 A1 - Document ID: US20250375730A1 - Status: Published application - Kind: A1 - Application number: 19/230,382 - Filed: 2025-06-06 - Published: 2025-12-11 - Earliest claimed: 2024-06-07 - Assignees: Entropy Inc. - Applicants: Entropy Inc. - Inventors: Paitoon TONTIWACHWUTHIKUL; Raphael IDEM; Tianci LI; Congning YANG; Gui TREMBLAY; James MARTIN; Megan BORDEN - Web page: https://patentgrep.com/patent/US20250375730A1 ## CPC - B01D 53/1475: {Removing carbon dioxide} - B01D 53/1425: {Regeneration of liquid absorbents} - B01D 53/229: {Integrated processes (Diffusion and at least one other process, e.g. adsorption, absorption)} - B01D 61/025: {Reverse osmosis; Hyperfiltration} - C02F 1/441: {by reverse osmosis} - B01D 2257/504: Carbon dioxide - C02F 2101/322: {Volatile compounds, e.g. benzene} - C02F 2103/18: from the purification of gaseous effluents - C02F 2209/02: Temperature - Y02C 20/40: of CO2 - 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) - C02F: TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE (separation in general B01D; special arrangements on waterborne vessels of installations for treating water, waste water or sewage, e.g. for producing fresh water, B63J; adding materials to water to prevent corrosion C23F; treating radioactively-contaminated liquids G21F9/04; regeneration of reactants for recirculation into processes, see the relevant places for the processes) - Y02C: CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG] ## Abstract Apparatus and methods to a prepare and use such apparatus for the capture of a volatile compound component from a water wash solution in an absorption unit of a post-combustion carbon capture system, said apparatus located after a water wash section of said unit where said water wash solution, comprising said volatile compound component, is exposed to said apparatus comprising a means to separate a volatile compound component from said water wash solution. ## Claims ### Claim 1 An apparatus for the capture of a volatile compound component from a water wash solution in an absorption unit of a post-combustion carbon capture system, said apparatus located after a water wash section of said unit where said water wash solution, comprising said volatile compound component, is exposed to said apparatus comprising a means to separate a volatile compound component from said water wash solution. ### Claim 2 (depends on 1) The apparatus according to claim 1, wherein said means to separate a volatile compound component from said water wash solution comprises at least one membrane. ### Claim 3 (depends on 0) The apparatus according to claim 0, wherein said at least one membrane comprises a reverse osmosis membrane. ### Claim 4 A method to treat and capture a volatile compound component from a water wash solution in a water wash portion of a post-combustion carbon capture system, wherein said method comprises the steps of: (a) providing a means to separate a volatile compound component from a water wash solution; (b) providing said water wash solution; (c) exposing said water wash solution to said means to separate a volatile compound component therefrom; and (d) recovering a treated water wash solution. (e) reusing treated water and treated volatile compounds. ### Claim 5 (depends on 4) The method according to claim 4, wherein said treated water wash solution is substantially free of volatile compound components. ### Claim 6 (depends on 4) The method according to claim 4, wherein said means to separate a volatile compound component from said water wash solution comprises at least one membrane. ### Claim 7 (depends on 6) The method according to claim 6, wherein said at least one membrane comprises a reverse osmosis membrane. ### Claim 8 (depends on 4) The method according to claim 4, wherein said water wash solution comprises one or more of the following compounds: 2-1-(2-hydroxyethyl) pyrrolidine (PR), hexamethylenediamine (HMDA), polyethylenimine (PEI, branch), 2-diethylaminoethanol (DEAE), 4-Amino-1-butanol (E), and monoethanolamine (MEA). ### Claim 9 (depends on 5) The method according to claim 5, wherein said water wash solution comprises one or more of the following compounds: 2-1-(2-hydroxyethyl) pyrrolidine (PR), hexamethylenediamine (HMDA), polyethylenimine (PEI, branch), 2-diethylaminoethanol (DEAE), 4-Amino-1-butanol (E), and monoethanolamine (MEA). ### Claim 10 (depends on 4) The method according to claim 4 wherein an initial concentration of said volatile compound component in said water wash solution is in the range of 0.01M to 0.5M. ### Claim 11 (depends on 5) The method according to claim 5 wherein an initial concentration of said volatile compound component in said water wash solution is in the range of 0.01M to 0.5M. ### Claim 12 (depends on 4) The method according to claim 4, wherein a temperature of said water wash solution is in the range of 25° C. to 40° C. ### Claim 13 (depends on 5) The method according to claim 5, wherein a temperature of said water wash solution is in the range of 25° C. to 40° C. ### Claim 14 Use of an apparatus comprising a means to separate and capture a volatile compound component from a water wash solution in a water wash portion of a post-combustion carbon capture system. ### Claim 15 (depends on 14) The use according to claim 14, wherein said volatile compound component comprises one or more of the following compounds: 2-1-(2-hydroxyethyl) pyrrolidine (PR), hexamethylenediamine (HMDA), polyethylenimine (PEI, branch), 2-diethylaminoethanol (DEAE), 4-Amino-1-butanol (E), and monoethanolamine (MEA). ### Claim 16 (depends on 15) The use according to claim 15, wherein an initial concentration of said volatile compound component in said water wash solution is in the range of 0.01M to 0.5M.