Multi-functional equipment for direct decarbonization with improved indoor air quality

Patent metadata

Field	Value
Publication number	US-12480672-B2
Application number	US-202217974227-A
Country	US
Kind code	B2
Filing date	Oct 26, 2022
Priority date	Oct 27, 2021
Publication date	Nov 25, 2025
Grant date	Nov 25, 2025

Abstract

A method of capturing carbon dioxide (CO 2 ) present in air is provided. The method includes adding a carbon-dioxide-capturing device to a heating, ventilation, and air conditioning (HVAC) system of a building. The carbon-dioxide-capturing device is added to one or both of an air handler and air-distribution ductwork of the HVAC system. The method further includes circulating air including carbon dioxide through the carbon-dioxide-capturing device in the HVAC system. A direct decarbonization system for capturing carbon dioxide present in air is also provided. The system includes an HVAC unit, air-distribution ductwork connected to the HVAC unit, and a carbon-dioxide-capturing device disposed in one or both of the HVAC unit and the air-distribution ductwork. Carbon dioxide gas present in air passing through the HVAC unit or the air-distribution ductwork is removable from the air by the carbon-dioxide-capturing device.

First claim

What is claimed is:

1 . A method of capturing carbon dioxide (CO 2 ) present in air, the method comprising:
adding a carbon-dioxide-capturing device to a heating, ventilation, and air conditioning (HVAC) system of a building; and circulating air including carbon dioxide through the carbon-dioxide-capturing device in the HVAC system; wherein the carbon-dioxide-capturing device is added to one or both of an air handler and air-distribution ductwork of the HVAC system; wherein the carbon-dioxide-capturing device removes carbon dioxide from the air by absorption.

2 . The method of claim 1 , wherein the air is non-ambient air within the building or the air is ambient air drawn into the HVAC system from an environment outside of the building.

3 . The method of claim 1 , wherein the carbon-dioxide-capturing device includes one of a hydrophobic material and a hydrophilic material.

4 . The method of claim 1 , wherein the carbon-dioxide-capturing device includes one of a thermally conductive material and a thermally non-conductive material.

5 . The method of claim 1 , wherein the carbon-dioxide-capturing device includes a carbon-dioxide-capturing material that is regenerated in the HVAC system or is removed from the HVAC system and regenerated outside of the HVAC system.

6 . The method of claim 5 , wherein the carbon-dioxide-capturing material is regenerated using waste energy from the HVAC system.

7 . The method of claim 1 , wherein the carbon dioxide captured in the HVAC system is decomposed by one or more of a biophotosynthetic process, a photothermal process, a microbial-photoelectrochemical process, a photosynthetic and photocatalytic (PS/PC) process, a photoelectrochemical (PEC) process, and a photovoltaic plus electrochemical (PV+EC) process.

8 . The method of claim 1 , wherein the air is actively or passively circulated through the carbon-dioxide-capturing device.

9 . The method of claim 1 , wherein the step of adding a carbon-dioxide-capturing device further includes adding a plurality of carbon-dioxide-capturing devices to the HVAC system, wherein one of the carbon-dioxide-capturing devices removes carbon dioxide from the air while another of the carbon-dioxide-capturing devices is being regenerated.

10 . The method of claim 1 , wherein the building is one of a commercial building and a residential building.

11 . The method of claim 1 , wherein the carbon-dioxide-capturing device includes a carbon-dioxide-capturing material that comprises one of an amine, a carbonate, and an ionic solution.

12 . A method of capturing carbon dioxide (CO 2 ) present in air, the method comprising:
adding a carbon-dioxide-capturing device to a heating, ventilation, and air conditioning (HVAC) system of a building; and circulating air including carbon dioxide through the carbon-dioxide-capturing device in the HVAC system; wherein the carbon-dioxide-capturing device is added to one or both of an air handler and air-distribution ductwork of the HVAC system; wherein the carbon-dioxide-capturing device is stationary.

13 . A direct decarbonization system for capturing carbon dioxide present in air, the system comprising:
a heating, ventilation, and air conditioning (HVAC) unit; air-distribution ductwork connected to the HVAC unit; and a carbon-dioxide-capturing device disposed in one or both of the HVAC unit and the air-distribution ductwork; wherein carbon dioxide (CO 2 ) gas present in air passing through the HVAC unit or the air-distribution ductwork is removable from the air by the carbon-dioxide-capturing device; wherein the carbon-dioxide-capturing device comprises an absorbent material.

14 . The direct decarbonization system of claim 13 , wherein the carbon-dioxide-capturing device comprises one of a hydrophobic and a hydrophilic material.

15 . The direct decarbonization system of claim 13 , wherein the carbon-dioxide-capturing device comprises one of a thermally conductive material and a thermally non-conductive material.

16 . The direct decarbonization system of claim 13 , wherein the carbon-dioxide-capturing device comprises a membrane.

17 . A direct decarbonization system for capturing carbon dioxide present in air, the system comprising:
a heating, ventilation, and air conditioning (HVAC) unit; air-distribution ductwork connected to the HVAC unit; and a carbon-dioxide-capturing device disposed in one or both of the HVAC unit and the air-distribution ductwork; wherein carbon dioxide (CO 2 ) gas present in air passing through the HVAC unit or the air-distribution ductwork is removable from the air by the carbon-dioxide-capturing device; wherein the carbon-dioxide-capturing device is stationary.

Assignees

• Ut Battelle Llc

Inventors

• Nawaz Kashif
• Fricke Brian A
• Sun Xin
• Sluder Scott
• Tsouris Constantinos
• Kidder Michelle K
• Janke Christopher J
• Li Kai
• Thompson Joshua A

Classifications

• B01D53/14

  by absorption · CPC title

• B01D53/04

  with stationary adsorbents {(B01D53/025 takes precedence)} · CPC title

• B01D53/06

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

• B01D53/02

  by adsorption, e.g. preparative gas chromatography {(solid sorbent compositions B01J20/00, preparation of inorganic compounds or elements C01)} · CPC title

• F24F8/175

  using biological materials, plants or microorganisms · CPC title