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1. WO2020112024 - AN ELECTROCHEMICAL REACTOR SYSTEM COMPRISING STACKABLE REACTION VESSELS

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[ EN ]

CLAIMS

1. An electrochemical reactor system comprising:

stackable reaction vessels, wherein each of the stackable reaction vessels is fillable with an electrolyte and comprises an anode, a cathode and an ion selective membrane arranged between the anode and the cathode; and

at least one gas sparger disposed across two of the stackable reaction vessels, wherein the two stackable reaction vessels are configured as an upstream stackable reaction vessel and a downstream stackable reaction vessel arranged adjacent to the upstream stackable reaction vessel, wherein the at least one gas sparger comprises (i) a pipe disposed across the two stackable reaction vessels and (ii) a chamber disposed in the downstream stackable reaction vessel, wherein the chamber has an opening and a closed end disposed away from the opening, wherein the pipe extends through the opening toward the closed end to direct gas to form a sparger headspace at the closed end within the chamber.

2. The electrochemical reactor system of claim 1 , wherein the pipe and the opening of the chamber are arranged to allow the gas to flow from the upstream stackable reaction vessel through the pipe into the adjacent downstream stackable reaction vessel which the chamber is disposed in, and to prevent the electrolyte from flowing through the pipe in a direction opposite to the flow of the gas.

3. The electrochemical reactor system of claim 1 or 2, wherein each of the stackable reaction vessels is designed to have a reaction headspace formable therein, wherein the reaction headspace prevents the electrolyte from flowing through the pipe from the downstream stackable reaction vessel to the upstream stackable reaction vessel arranged adjacent to the downstream stackable reaction vessel.

4. The electrochemical reactor system of any one of claims 1 to 3, wherein the opening of the chamber faces a direction opposite to which the gas flows through the pipe from the upstream stackable reaction vessel into the adjacent downstream stackable reaction vessel.

5. The electrochemical reactor system of any one of claims 1 to 4, wherein a liquid-proof gas permeable membrane is arranged between the upstream stackable reaction vessel and the adjacent downstream stackable reaction vessel to prevent liquid and the electrolyte migrating between the upstream stackable reaction vessel and the adjacent downstream stackable reaction vessel.

6. The electrochemical reactor system of any one of claims 1 to 5, wherein either or both of the anode and the cathode comprise a catalyst configured to perform an electrochemical reaction in each of the stackable reaction vessels, wherein the electrochemical reaction in each of the stackable reaction vessels is different.

7. The electrochemical reactor system of any one of claims 1 to 6, wherein each of the stackable reaction vessels comprises an anode compartment and a cathode compartment which the anode and the cathode in each of the stackable reaction vessels are coupled to, respectively.

8. The electrochemical reactor system of claim 7, wherein the anode compartment is formed in each of the stackable reaction vessels, and wherein the anode compartment is shaped to have a serpentine flow channel.

9. The electrochemical reactor system of claim 7 or 8, wherein the anode compartment is in fluid communication with a second electrolyte tank.

10. The electrochemical reactor system of any one of claims 7 to 9, wherein the anode compartment is an opened compartment exposed to atmosphere.

11. The electrochemical reactor system of any one of claims 7 to 10, wherein the cathode compartment is formed in each of the stackable reaction vessels, and wherein the cathode compartment is in fluid communication with a first electrolyte tank.

12. The electrochemical reactor system of any one of claims 1 to 11, wherein two of the stackable reaction vessels each comprise the cathode compartment being in fluid communication with a gas tank.

13. The electrochemical reactor system of any one of claims 1 to 12, wherein the anode and the cathode each have (i) a length ranging from 0.5 cm to 3 cm, and/or (ii) a diameter ranging from 0.5 to 3 cm.

14. The electrochemical reactor system of any one of claims 1 to 13, wherein the anode and the cathode in each of the stackable reaction vessels are spaced apart at 2 cm or less.

15. The electrochemical reactor system of any one of claims 1 to 14, wherein the chamber is constructed of a plastic comprising polyether ether ketone or polyetherimide.

16. The electrochemical reactor system of any one of claims 1 to 15, wherein each of the stackable reaction vessels is constructed from a chemically inert material comprising polytetrafluoroethylene, ethylenetetrafluoroethylene, polychlorotrifluoroethylene, or polyether ether ketone.

17. The electrochemical reactor system of any one of claims 1 to 16, further comprising a gas permeable membrane disposed at an end of the pipe proximal to the closed end of the chamber.

18. The electrochemical reactor system of any one of claims 1 to 17, wherein the stackable reaction vessels are vertically stacked.

19. The electrochemical reactor system of any one of claims 1 to 18, wherein the stackable reaction vessels are horizontally stacked.

20. The electrochemical reactor system of any one of claims 1 to 19, wherein the stackable reaction vessels are contiguously stacked.