Continuous carbon dioxide capture system for increasing adsorption efficiency and regeneration purity and method of operating the same

Patent metadata

Field	Value
Publication number	US-2026034498-A1
Application number	US-202519287442-A
Country	US
Kind code	A1
Filing date	Jul 31, 2025
Priority date	Aug 1, 2024
Publication date	Feb 5, 2026
Grant date	—

Abstract

The present disclosure relates to a continuous carbon dioxide capture system for increasing adsorption efficiency and regeneration purity, more particularly to, as a continuous carbon dioxide capture system, a continuous direct air capture system with a low differential pressure for increasing adsorption efficiency and regeneration purity including: an adsorption unit including a housing having an inlet part for introducing external air and an outlet part for discharging carbon dioxide-removed air, and a plurality of adsorbent modules installed within the housing and composed of carbon dioxide adsorbents, wherein the adsorption unit is connected in plurality, and the adsorption unit sequentially undergoes adsorption mode and regeneration mode and always operates in adsorption mode in a set number of adsorption units; a suction valve provided at the inlet part for introducing external air, and an outlet valve provided at the outlet part for exhausting the gas passed through the adsorbent modules; and a controller for controlling the suction valve and the outlet valve according to the adsorption mode and the regeneration modes, respectively.

First claim

1 . As a continuous carbon dioxide capture system, a continuous carbon dioxide capture system for increasing adsorption efficiency and regeneration purity comprising:
a housing that includes an air inlet port through which external air is introduced and an outlet port through which carbon dioxide-removed air is discharged; and an adsorption unit that is installed within the housing and configured with a carbon dioxide adsorbent, wherein the adsorption unit is connected in plurality and sequentially undergoes an adsorption mode, a heating mode, a CO 2 regeneration mode, and a nitrogen regeneration-cooling mode, such that a set number of adsorption units always operate in the adsorption mode; and a regeneration circulation line that connects an adsorption unit in the heating mode to an adsorption unit in the regeneration mode.

2 . The continuous carbon dioxide capture system for increasing adsorption efficiency and regeneration purity of claim 1 , wherein
each of the plurality of adsorption units sequentially undergoes an adsorption mode, a preheating mode, a first heating mode, a second heating mode, a CO2 regeneration mode, an N2 regeneration-cooling mode, and an adsorption mode, and a set number of the adsorption units always operate in the adsorption mode.

3 . The continuous carbon dioxide capture system for increasing adsorption efficiency and regeneration purity of claim 2 , further comprising:
a cooling circulation line that connects an outlet port of the adsorption unit in the preheating mode and an inlet port of an adsorption unit in a cooling step of the N 2 regeneration-cooling mode, and connects an outlet port of the adsorption unit in the cooling step of the N 2 regeneration-cooling mode and an inlet port of the adsorption unit in the preheating mode.

4 . The continuous carbon dioxide capture system for increasing adsorption efficiency and regeneration purity of claim 3 , further comprising:
an N 2 —CO 2 purge line for purging N 2 —CO 2 into the adsorption unit in preheating mode; and a first valve provided on one side of the N 2 —CO 2 purge line.

5 . The continuous carbon dioxide capture system for increasing adsorption efficiency and regeneration purity of claim 4 , further comprising:
an N 2 regeneration circulation line that connects an outlet port of the adsorption unit in the first heating mode and an inlet port of an adsorption unit in an N 2 regeneration step of the N 2 regeneration-cooling mode, and connects an inlet port of the adsorption unit in the N 2 regeneration step and an inlet port of the adsorption unit in the first heating mode; and a CO 2 purge line for purging CO 2 into the adsorption unit in the first heating mode.

6 . The continuous carbon dioxide capture system for increasing adsorption efficiency and regeneration purity of claim 5 , further comprising:
a discharge line through which N 2 —CO 2 is discharged from the adsorption unit in the first heating mode; and a second valve provided on one side of the discharge line.

7 . The continuous carbon dioxide capture system for increasing adsorption efficiency and regeneration purity of claim 6 , further comprising:
an N 2 —CO 2 buffer tank provided between the N 2 —CO 2 purge line and the discharge line.

8 . The continuous carbon dioxide capture system for increasing adsorption efficiency and regeneration purity of claim 7 , further comprising:
a regeneration circulation line that connects an outlet port of the adsorption in the second heating mode and an inlet port of the adsorption unit in the CO 2 regeneration mode, and connects an outlet port of the inlet port of the adsorption unit in the CO 2 regeneration mode and an inlet port of the adsorption unit in the second heating mode.

9 . The continuous carbon dioxide capture system for increasing adsorption efficiency and regeneration purity of claim 8 , further comprising:
a condensation line branched from a line that connects the outlet port of the adsorption unit in the second heating mode and the inlet port of the adsorption unit in the CO 2 regeneration mode, and connected to a CO 2 storage tank; and a moisture condensation part provided within the condensation line to condense moisture.

10 . The continuous carbon dioxide capture system for increasing adsorption efficiency and regeneration purity of claim 9 , wherein
the CO 2 purge line is provided between the CO 2 storage tank and the inlet port of the adsorption unit in the first heating mode, and further comprising a third valve provided on one side of the CO 2 purge line.

11 . As a method of operating the continuous carbon dioxide capture system according to claim 1 , a method of operating the continuous carbon dioxide capture system for increasing adsorption efficiency and regeneration purity comprising:
a first step in which an adsorption unit in an adsorption mode allows external air to be introduced through an inlet port, and discharges carbon dioxide-removed air through an outlet port; a second step in which an adsorption unit switched to a preheating mode circulates gas through an adsorption unit in a cooling step of an N 2 regeneration-cooling mode and cooling circulation line; a third step in which an adsorption unit switched to a first heating mode circulates gas through the adsorption unit in the cooling step of the N 2 regeneration-cooling mode and an N 2 regeneration line; a fourth step in which an adsorption unit switched to a second heating mode circulates gas through an adsorption unit in a CO 2 regeneration mode and a regeneration circulation line, and CO 2 discharged through a condensation line branched from one side of the regeneration circulation line is stored in a CO 2 storage tank; a fifth step in which an adsorption switched to a regeneration mode circulates gas through the adsorption unit switched to the second heating mode and the regeneration circulation line, and CO 2 discharged through the condensation line branched from one side of the regeneration circulation line is stored in the CO 2 storage tank; a sixth step in which an adsorption unit moved into a regeneration-cooling unit and switched to an N 2 regeneration step of the N 2 regeneration-cooling mode circulates gas through the adsorption unit in the first heating mode and the N2 regeneration circulation line; a seventh step in which an adsorption unit switched to a cooling step of the N 2 regeneration-cooling mode circulates gas through the adsorption unit in the preheating mode and the cooling circulation line; and a step of repeating the first step to the seventh step.

12 . The method of operating the continuous carbon dioxide capture system for increasing adsorption efficiency and regeneration purity of claim 11 , wherein
in the second step, N 2 is purged to the adsorption unit, and in the third step, CO 2 is purged to the adsorption unit purges.

13 . The method of operating the continuous carbon dioxide capture system for increasing adsorption efficiency and regeneration purity of claim 12 , wherein
in the third step, N 2 —CO 2 is discharged through an outlet line and stored in a buffer tank, and the N 2 —CO 2 stored in the buffer tank is purged to the adsorption unit in the second step.

14 . The method of operating the continuous carbon dioxide capture system for increasing adsorption efficiency and regeneration purity of claim 13 , wherein
the CO 2 stored in the CO 2 storage tank is supplied to the adsorption unit in the first heating unit through a CO 2 purge line.

15 . As a method of operating the continuous carbon dioxide capture system a

Assignees

• Korea Inst Energy Res

Inventors

• Kim Jae Young
• Jin Gyoung-Tae
• Park Young Cheol
• Jo Sung-Ho
• Park Jae-Hyeon
• Lee Dong-Ho
• Lee Yu Ri
• Hwang Yuntae
• Kim Jeong Min
• Park Hyun-Seol
• Chun Dong-Hyuk
• Kim Hyunuk
• Moon Dong-Kyu

Classifications

• B01D2259/4009

  using hot gas · CPC title

• B01D2257/80

  Water · CPC title

• B01D2257/504

  Carbon dioxide · CPC title

• B01D53/265

  by refrigeration (condensation) · CPC title

• B01D53/0446

  Means for feeding or distributing gases · CPC title