Carbon dioxide capture system

Patent metadata

Field	Value
Publication number	US-2025375732-A1
Application number	US-202218875212-A
Country	US
Kind code	A1
Filing date	Jul 15, 2022
Priority date	Jul 15, 2022
Publication date	Dec 11, 2025
Grant date	—

Abstract

A carbon dioxide capture system according to the present disclosure includes a supply route, a carbon dioxide capture portion that has a processing region and a recycling region, an extraction route, a recycle route, a circulation route, and a carbon dioxide separator. The supply route guides air. The processing region causes a sorbent to adsorb carbon dioxide present in the air. The recycle region recycles the sorbent using a recycle fluid. The extraction route guides the air having a reduced concentration of carbon dioxide using the processing region. The recycle route guides the recycle fluid to the recycle region. The circulation route guides a recycle discharge fluid that is discharged by recycling the sorbent using the recycle fluid. The carbon dioxide separator obtains the recycle fluid by separating at least a portion of the carbon dioxide from the recycle discharge fluid.

First claim

1 . A carbon dioxide capture system comprising:
a supply route that guides air; a carbon dioxide capture portion that has a processing region, which causes a sorbent to adsorb carbon dioxide present in the air, and a recycle region that recycles the sorbent using a recycle fluid; an extraction route that guides the air having a reduced concentration of carbon dioxide using the processing region; a recycle route that guides the recycle fluid to the recycle region; a circulation route that guides a recycle discharge fluid that is discharged by recycling the sorbent using the recycle fluid; a carbon dioxide separator that obtains the recycle fluid by separating at least a portion of the carbon dioxide from the recycle discharge fluid; and a capture route that is connected to the carbon dioxide separator, and captures the separated carbon dioxide, wherein the recycle route is connected to the carbon dioxide separator, and guides the recycle fluid that has a reduced concentration of carbon dioxide, due to the carbon dioxide being guided from the carbon dioxide separator to the capture route.

2 . A carbon dioxide capture system according to claim 1 , further comprising:
a heater that heats the recycle fluid; a cooler that cools the recycle discharge fluid; and a compressor that increases a pressure of the recycle discharge fluid.

3 . The carbon dioxide capture system according to claim 2 , wherein
the heater heats the recycle fluid by exchanging heat with a heat transfer fluid, and the cooler cools the recycle discharge fluid by exchanging heat with the heat transfer fluid.

4 . The carbon dioxide capture system according to claim 2 , further comprising:
an intermediate heat exchanger, wherein the heater heats the recycle fluid by exchanging heat with a first heat transfer fluid, and the intermediate heat exchanger cools a second heat transfer fluid by exchanging heat with the first heat transfer fluid, and the cooler cools the recycle discharge fluid by exchanging heat with the second heat transfer fluid.

5 . The carbon dioxide capture system according to claim 1 , wherein
the carbon dioxide separator separates the carbon dioxide present in the recycle discharge fluid using liquefied separation.

6 . The carbon dioxide capture system according to claim 1 , wherein
the carbon dioxide separator separates the carbon dioxide present in the recycle discharge fluid using membrane separation.

7 . The carbon dioxide capture system according to claim 3 , wherein
the heat transfer fluid is carbon dioxide.

8 . The carbon dioxide capture system according to claim 3 , wherein
the heater and the cooler at least configure an air conditioner.

9 . The carbon dioxide capture system according to claim 3 , wherein
the heater and the cooler at least configure a refrigeration and freezing device.

10 . The carbon dioxide capture system according to claim 1 , wherein
an exhaust route that discharges a portion of the air that flows through the extraction route to an outside, is connected to the extraction route.

11 . The carbon dioxide capture system according to claim 2 , wherein
the compressor increases the pressure of the recycle discharge fluid that is guided to the carbon dioxide separator.

12 . The carbon dioxide capture system according to claim 4 further comprising:
a heat transfer fluid compressor that increases a pressure of the heat transfer fluid; and
an expander that decreases the pressure of the heat transfer fluid;
wherein
the heat transfer fluid compressor, the heater, the expander, and the cooler configure a heat pump that circulates the heat transfer fluid in such order.

Assignees

• Mitsubishi Electric Corp

Inventors

• Shinoki Toshio
• Onaka Yoji
• Nakashima Seiji
• Kawamoto Makoto
• Tanishima Makoto

Classifications

• B01D2259/4009

  using hot gas · CPC title

• B01D2258/06

  Polluted air · CPC title

• B01D2257/504

  Carbon dioxide · CPC title

• B01D53/06

  with moving adsorbents, e.g. rotating beds {(B01D53/025 takes precedence)} · CPC title

• B01D53/0462

  Temperature swing adsorption · CPC title