# US 2026/0084086 A1 · Carbon dioxide recovery apparatus and carbon dioxide recovery method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2026/0084086 A1 - Document ID: US20260084086A1 - Status: Published application - Kind: A1 - Application number: 19/106,714 - Filed: 2023-02-17 - Published: 2026-03-26 - Earliest claimed: 2022-09-01 - Assignees: Mitsubishi Heavy Industries, Ltd. - Applicants: Mitsubishi Heavy Industries, Ltd. - Inventors: Takuro Onuki; Masayuki Inui; Masatoshi Katsuki; Tatsuya Tsujiuchi; Takahito Yonekawa; Takeshi Matsuo; Yutaka Kosugi - Web page: https://patentgrep.com/patent/US20260084086A1 ## CPC - B01D 53/0407: {Constructional details of adsorbing systems} - B01D 53/0462: {Temperature swing adsorption} - B01D 53/62: Carbon oxides - B01D 53/82: with stationary reactants - B01D 53/96: Regeneration, reactivation or recycling of reactants - B01D 2257/504: Carbon dioxide - B01D 2258/06: Polluted air - B01D 2259/41: using plural beds of the same adsorbent in series - 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) - Y02C: CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG] ## Abstract A carbon dioxide recovery apparatus includes: a first adsorption chamber having an intake port and an exhaust port open to an atmosphere; a fan that is configured to form a flow of air in a direction from the intake port toward the exhaust port; a damper that is configured to close the exhaust port; a first adsorption unit that is disposed in the first adsorption chamber and is configured to adsorb carbon dioxide contained in air; a second adsorption chamber that is formed alongside the first adsorption chamber; a connecting pipe that connects the first adsorption chamber and the second adsorption chamber to each other; a second adsorption unit that is disposed in the second adsorption chamber and is configured to adsorb carbon dioxide contained in a gas flowing into the second adsorption chamber from the connecting pipe; and an on-off valve that is provided on the connecting pipe. ## Claims ### Claim 1 A carbon dioxide recovery apparatus comprising: a first adsorption chamber having an intake port and an exhaust port open to an atmosphere; a fan that is configured to form a flow of air in a direction from the intake port toward the exhaust port; a damper that is configured to close the exhaust port; a first adsorption unit that is disposed in the first adsorption chamber and is configured to adsorb carbon dioxide contained in air; a second adsorption chamber that is formed alongside the first adsorption chamber; a connecting pipe that connects the first adsorption chamber and the second adsorption chamber to each other; a second adsorption unit that is disposed in the second adsorption chamber and is configured to adsorb carbon dioxide contained in a gas flowing into the second adsorption chamber from the connecting pipe; an on-off valve that is provided on the connecting pipe; a first desorption unit that is configured to desorb the carbon dioxide absorbed by the first adsorption unit; a second desorption unit that is configured to desorb the carbon dioxide absorbed by the second adsorption unit; and a suction unit that is connected to the second adsorption unit and is configured to suck gases in the first adsorption chamber and the second adsorption chamber. ### Claim 2 (depends on 1) The carbon dioxide recovery apparatus according to claim 1, wherein a porosity of the first adsorption unit is larger than a porosity of the second adsorption unit, and a volume of the first adsorption unit is larger than a volume of the second adsorption unit. ### Claim 3 (depends on 1) The carbon dioxide recovery apparatus according to claim 1, wherein the first desorption unit is a first heating unit that is configured to heat the first adsorption unit. ### Claim 4 (depends on 1) The carbon dioxide recovery apparatus according to claim 1, wherein the second desorption unit is a second heating unit that is configured to heat the second adsorption unit. ### Claim 5 (depends on 1) The carbon dioxide recovery apparatus according to claim 1, wherein the second desorption unit is the suction unit that is connected to the second adsorption unit and is configured to suck the gas in the second adsorption chamber. ### Claim 6 (depends on 1) The carbon dioxide recovery apparatus according to claim 1, wherein the second desorption unit further includes a water vapor supply unit that is configured to supply water vapor into the second adsorption chamber. ### Claim 7 (depends on 1) The carbon dioxide recovery apparatus according to claim 1, further comprising: a single or a plurality of the first adsorption chambers and the first adsorption units that are arranged in parallel; and a single or a plurality of the second adsorption chambers and the second adsorption units that are arranged in parallel. ### Claim 8 (depends on 7) The carbon dioxide recovery apparatus according to claim 7, wherein a total value of porosities and volumes of the plurality of second adsorption units is smaller than a total value of porosities and volumes of the plurality of first adsorption units. ### Claim 9 (depends on 1) A carbon dioxide recovery method using the carbon dioxide recovery apparatus according to claim 1, the carbon dioxide recovery method comprising: a step of adsorbing carbon dioxide onto the first adsorption unit by driving the fan while opening the damper in a state where the on-off valve is closed; a step of desorbing the carbon dioxide adsorbed onto the first adsorption unit by driving the first desorption unit and adsorbing the carbon dioxide onto the second adsorption unit by driving the suction unit to guide a gas containing the desorbed carbon dioxide to the second adsorption chamber through the connecting pipe, in a state where the damper is closed and the on-off valve is opened; and a step of desorbing the carbon dioxide adsorbed onto the second adsorption unit to guide the carbon dioxide to an outside by driving the suction unit and the second desorption unit, in a state where the on-off valve is closed, wherein the step of adsorbing carbon dioxide onto the first adsorption unit and the step of desorbing the carbon dioxide adsorbed onto the second adsorption unit to guide the carbon dioxide to the outside are executed in parallel.