Apparatus and method for removal of a target gas from a cold storage environment

Patent metadata

Field	Value
Publication number	US-11976371-B2
Application number	US-202117145754-A
Country	US
Kind code	B2
Filing date	Jan 11, 2021
Priority date	Jan 14, 2020
Publication date	May 7, 2024
Grant date	May 7, 2024

Abstract

Various embodiments are directed to an improved electrochemical cell system that is configured to reduce the concentration of a target gas in a cold storage environment. The electrochemical cell system may comprise an electrochemical cell apparatus, an air circulation apparatus, and a flow hood. The electrochemical cell apparatus may be combined with or coupled to an air circulation apparatus via the flow hood to maximize access of the target gas to the gas aperture.

First claim

What is claimed is:

1. An electrochemical cell system configured for reducing a concentration of a target gas in a cold storage environment comprising:
an electrochemical cell apparatus comprising a housing including a gas aperture, a first electrode and a second electrode disposed within the housing, wherein the electrochemical cell apparatus is configured to receive the target gas through the gas aperture, at least partially electrochemically oxidize the target gas upon contact with a surface of the first electrode to form one or more reaction products, and disseminate at least part of the one or more reaction products through the gas aperture, reducing the concentration of the target gas;
an air circulation apparatus; and
a flow hood, wherein the electrochemical cell apparatus is coupled to the air circulation apparatus via the flow hood, the flow hood defining a flow path for the target gas to flow across the gas aperture of the electrochemical cell apparatus.

2. The electrochemical cell system according to claim 1 , wherein the flow hood is configured such that it generates a turbulent flow of the target gas through the flow hood.

3. The electrochemical cell system according to claim 1 , wherein the flow hood comprises one or more protrusions in the flow path.

4. The electrochemical cell system according to claim 1 , wherein the electrochemical cell apparatus further comprises a third electrode.

5. The electrochemical cell system according to claim 4 , wherein the electrochemical cell apparatus further comprises a fourth electrode.

6. The electrochemical cell system according to claim 1 , wherein the electrochemical cell apparatus further comprises one or more electrolyte separators disposed between the first electrode and the second electrode.

7. The electrochemical cell system according to claim 1 , wherein the first electrode comprises a first gas permeable membrane and a first catalyst mixture, the first electrode positioned within the housing such that the target gas passes through the first gas first permeable membrane prior to reaching the first catalyst mixture.

8. The electrochemical cell system according claim 1 , wherein the target gas comprises ethylene, hydrogen sulfide, or combinations thereof.

9. The electrochemical cell system according to claim 1 , wherein at least one of the first electrode or the second electrode comprises gold or a gold alloy.

10. The electrochemical cell system according to claim 1 , wherein the air circulation apparatus is a fan.

11. The electrochemical cell system according to claim 1 , wherein the air circulation apparatus is a pump.

12. The electrochemical cell system according claim 1 , further comprising an electronic circuit configured to measure a current generated by the electrochemical cell apparatus.

13. The electrochemical cell system according to claim 12 , wherein the air circulation apparatus is configured such that it is activated when the current generated by the electrochemical cell apparatus satisfies a predetermined threshold.

14. The electrochemical cell system according to claim 1 , further comprising a timer and wherein the air circulation apparatus is configured such that it is activated upon expiration of a defined period of time measured by the timer.

15. The electrochemical cell system according to claim 1 , further comprising a high surface area carbon filter.

16. A method for reducing a concentration of a target gas in a cold storage environment using an electrochemical cell apparatus, the method comprising:
generating a turbulent flow of a target gas across a gas aperture of an electrochemical cell apparatus, the electrochemical cell apparatus comprising a housing including a first electrode and a second electrode disposed within the housing;
contacting a surface of the first electrode of the electrochemical cell apparatus with the target gas, wherein the first electrode is configured to selectively electrochemically oxidize the target gas into one or more reaction products; and
disseminating at least part of the one or more reaction products through the gas aperture of the electrochemical cell apparatus into the turbulent flow such that the concentration of the target gas is reduced in the cold storage environment.

17. The method of claim 16 , further comprising measuring an amount of current generated by the electrochemical cell apparatus.

18. The method of claim 17 , wherein the electrochemical cell apparatus is coupled to an air circulation apparatus via a flow hood, the flow hood defining a flow path for the target gas to flow across the gas aperture of the electrochemical cell apparatus.

19. The method of claim 18 , further comprising activating the air circulation apparatus in an instance wherein the measured amount of current generated by the electrochemical cell apparatus satisfies a predetermined threshold.

20. The method of claim 18 , wherein the air circulation apparatus is a fan or a pump.

Assignees

• Honeywell Int Inc

Inventors

• Chapples John

Classifications

• C25B15/08 Primary

  Supplying or removing reactants or electrolytes; Regeneration of electrolytes · CPC title

• B01D53/326 Primary

  in electrochemical cells · CPC title

• C25B1/02

  Hydrogen or oxygen · CPC title

• C25B3/02

  Chemistry & Metallurgy · mapped topic

• C25B3/07

  Oxygen containing compounds · CPC title