# US 2014/0196481 A1 · Carbon dioxide removal system using absorption refrigeration > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0196481 A1 - Document ID: US20140196481A1 - Status: Published application - Kind: A1 - Application number: 13/741,674 - Filed: 2013-01-15 - Published: 2014-07-17 - Earliest claimed: 2013-01-15 - Assignees: ALSTOM Technology Ltd - Applicants: ALSTOM Technology Ltd. - Inventors: Sanjay Kumar Dube - Web page: https://patentgrep.com/patent/US20140196481A1 ## CPC - F25B 27/00: Machines, plants or systems, using particular sources of energy (F25B30/06 takes precedence) - B01D 53/1475: {Removing carbon dioxide} - B01D 53/343: {Heat recovery} - B01D 53/62: Carbon oxides - F23J 15/06: of coolers - B01D 2252/102: Ammonia - B01D 2258/0283: Flue gases - F23J 2215/50: Carbon dioxide - F25B 15/04: the refrigerant being ammonia evaporated from aqueous solution {(F25B15/025 takes precedence)} - F25B 15/06: the refrigerant being water vapour evaporated from a salt solution, e.g. lithium bromide {(F25B15/025 takes precedence)} - Y02C 20/40: of CO2 - Y02E 20/14: Combined heat and power generation [CHP] - Y02E 20/16: Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT] - Y02E 20/30: Technologies for a more efficient combustion or heat usage - Y02E 20/32: Direct CO2 mitigation - F25B: REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS - 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 A carbon dioxide removal system includes a chilled ammonia carbon capture system; an absorber refrigeration system in fluid communication with the chilled ammonia system; and a heat recovery steam generator (HSRG) in fluid communication with the chilled ammonia system and the absorber refrigeration system. ## Claims ### Claim 1 A carbon dioxide removal system comprising: a chilled ammonia carbon capture system; an absorber refrigeration system in fluid communication with the chilled ammonia system; and a heat recovery steam generator (HSRG) in fluid communication with the chilled ammonia system and the absorber refrigeration system. ### Claim 2 (depends on 1) The carbon dioxide removal system of claim 1, further comprising a refrigerant stripper and a reboiler, both in fluid communication with the chilled ammonia carbon capture system, the refrigerant absorber and the HRSG. ### Claim 3 (depends on 2) The carbon dioxide removal system of claim 2, wherein the reboiler is configured to receive steam, and the refrigerant stripper is configured to receive a vapor stream comprising ammonia and water from the reboiler. ### Claim 4 (depends on 3) The carbon dioxide removal system of claim 3, further comprising a condenser and a first heat exchanger, wherein the condenser is configured to receive a vapor refrigerant from the refrigerant stripper to condense the vapor refrigerant using a cooling medium, and the first heat exchanger is configured to receive the liquid refrigerant from the condenser to cool the refrigerant. ### Claim 5 (depends on 4) The carbon dioxide removal system of claim 4, wherein the absorber refrigeration system is selected from the group consisting of a LiBr-water system and an ammonia-water system. ### Claim 6 (depends on 4) The carbon dioxide removal system of claim 4, wherein the absorber refrigeration system is configured to receive refrigerant from the first heat exchanger. ### Claim 7 (depends on 6) The carbon dioxide removal system of claim 6, further comprising a second heat exchanger, wherein the second heat exchanger is configured to receive a liquid stream comprising the refrigerant from the refrigerant absorber to produce a heated liquid stream comprising the refrigerant. ### Claim 8 (depends on 7) The carbon dioxide removal system of claim 7, further comprising a CAP stripper condenser configured to receive the heated liquid stream from the second heat exchanger comprising the refrigerant from the refrigerant absorber, and wherein the refrigerant stripper is configured to receive the heated liquid stream from the CAP stripper condenser. ### Claim 9 (depends on 3) The carbon dioxide removal system of claim 3, further comprising a condenser and a first heat exchanger, wherein the condenser is configured to receive a vapor refrigerant from the refrigerant stripper, and the first heat exchanger is configured to receive a liquid refrigerant. ### Claim 10 (depends on 1) The carbon dioxide removal system of claim 1, wherein the system is configured to operate at an ambient wet bulb temperature greater than about 5° C. ### Claim 11 (depends on 10) The carbon dioxide removal system of claim 10, wherein the system is configured to operate at an ambient wet bulb temperature greater than about 10° C. ### Claim 12 (depends on 10) The carbon dioxide removal system of claim 10, wherein the system is configured to operate at an ambient wet bulb temperature greater than about 15° C. ### Claim 13 A method for reducing power consumed during a carbon capture process, comprising: in a carbon dioxide removal system comprising: a chilled ammonia carbon capture system; an absorber refrigeration system in fluid communication with the chilled ammonia system; and a heat recovery steam generator (HSRG) in fluid communication with the chilled ammonia system and the absorber refrigeration system; contacting the chilled ammonia carbon capture system with the absorber refrigeration system without the use of a mechanical refrigeration system. ### Claim 14 (depends on 13) The method of claim 13, wherein a CAP stripper condenser receives a heated liquid stream comprising ammonia from the refrigerant absorber, and the refrigerant stripper receive the heated liquid stream from the CAP stripper condenser. ### Claim 15 (depends on 14) The method of claim 14, comprising contacting the chilled ammonia carbon capture system with the absorber refrigeration system without the use of a mechanical refrigeration system at an ambient wet bulb temperature of greater than about 5° C.