Systems and methods for continuous generation of gases

Patent metadata

Field	Value
Publication number	US-2023313391-A1
Application number	US-202118040191-A
Country	US
Kind code	A1
Filing date	Aug 4, 2021
Priority date	Aug 4, 2020
Publication date	Oct 5, 2023
Grant date	—

Abstract

Provided is a system for continuous generation of gases, the system including an electrochemical device and an active- material regeneration device.

First claim

1 - 50 . (canceled)

51 . A system for generation of gases, the system comprising
an electrochemical device comprising one or more electrode assemblies and a redox-active material, wherein the redox-active material is provided as an electrode material provided as a material film on a surface region of an electrode or is the electrode material or as a dispersion thereof; and a redox-active material regeneration device that is external to the electrochemical device, wherein the electrochemical device comprises an electrode assembly comprising (i) at least two electrodes of the redox-active material, or (ii) a movable electrode of the redox-active material, and wherein when the electrochemical device comprises two or more electrodes of the redox-active material, at any time point, one of the electrodes is operable.

52 . The system according to claim 51 , wherein the electrochemical device comprises
means configured and operable to output, while the device is in operation, the redox-active material, in an oxidized form, from the device to a region outside of the device and means configured and operable to input, while the device is in operation, the redox-active material, in a reduced form, from a region outside the device back into the device; such that the amount of the redox-active material in the reduced form in the device remains substantially constant during the device operation.

53 . The system according to claim 51 , wherein the electrochemical device is provided with an external closed loop system having at least one inlet permitting flow of a material from the electrochemical device to a region outside of the device, at least one outlet permitting flow of a material from the closed loop back into the device, and at least one regeneration device positioned between said inlet and outlet.

54 . The system according to claim 51 , wherein the electrochemical device is provided with an external closed loop system having at least one inlet and at least one outlet, the external closed loop system defining a path of a moving electrode having a segment thereof in the electrochemical device and another segment thereof extending the length of the external closed loop, the external closed loop system being provided with at least one regeneration device positioned between said inlet and outlet.

55 . The system according to claim 51 , wherein the electrochemical device is provided with means for removing an electrode from the device, while in operation, to an outside region of the device for regeneration.

56 . The system according to claim 51 , the system being provided with a mechanical system configured and operable to attach and move an electrode from the electrochemical device to the regeneration device, wherein the mechanical system is optionally in a form or comprises a moving belt, a robotic arm, a mechanical lift or a displacing mechanism.

57 . The system according to claim 51 , wherein when the electrochemical device comprises the movable electrode, the electrochemical device is provided with an external closed loop system and the electrode is structured as a continuous belt extending both the electrochemical device and regeneration device.

58 . The system according to claim 57 , wherein part of the electrode active material is in an oxidized form and another part of the electrode is in a reduced form, and wherein the part of the electrode moving through the electrochemical device undergoes oxidation and the part moving through the regeneration device undergoes reduction.

59 . The system according to claim 51 , wherein the movable electrode is in a form of active particles dispersed in a medium of the electrochemical device.

60 . An electrochemical device for generation of a gas utilizing at least one redox-active material having an oxidized form and a reduced form, the device comprising
an external closed loop configured and operable to output, while the device is in operation, the at least one redox-active material or a medium comprising same from the device to a regeneration device positioned or associated with the external closed loop, and further configured and operable to input, while the device is in operation, the at least one redox-active material or a medium comprising same back into the device; such that the amount of the at least redox-active material in the reduced form in the device remains substantially constant during device operation, wherein the external closed loop further comprises an electrolyte bath positioned between an outlet of the electrochemical device and an inlet of the regeneration device, and wherein the electrolyte bath is maintained at a temperature higher than the temperature of the electrolyte medium in the electrochemical device and lower than the temperature of the electrolyte medium in the regeneration device.

61 . An electrochemical device for generation of a gas utilizing at least one redox-active material having an oxidative form and a reduced form, the device comprising a movable belt-shape electrode and an external closed loop system defining a path of the movable electrode, and a regeneration device positioned or associated with the external closed loop system.

62 . An electrochemical device for generation of a gas utilizing at least one redox-active material having an oxidized form and a reduced form, the device comprising
a rotary screw conveyor configured and operable to lift the active material and transport it from the electrochemical device and into a regeneration device, wherein the electrochemical device and the regeneration device are associated through an external closed loop system defining a path of the active material, and wherein the regeneration device is integrally positioned or associated with the external closed loop system, the electrochemical device being provided with a pair of valves each configured to electrically isolate the active material, wherein a first valve of said pair of valves is provided at an entry point of the active material to the electrochemical cell and a second valve of said pair of valves is provided at an exit point of the active material from the electrochemical cell.

63 . The device according to claim 62 , wherein each of the valves is a rotary valve.

64 . The device according to claim 62 , wherein the first and second valves are positioned in series.

65 . The device according to claim 61 , wherein the external closed loop system is provided with at least one inlet and at least one outlet, the external closed loop system defining the path of the electrode or active material having a segment thereof in the electrochemical device and another segment thereof extending the length of the external closed loop, the external closed loop system being provided with at least one regeneration device positioned between said inlet and outlet.

66 . The device according to claim 60 , wherein the external closed loop system is provided in the form of a continuous tubing or pipe or channel that comprises an electrolyte solution that is maintained under conditions substantially identical to conditions defining the electrolyte medium in the electrochemical device.

67 . The device according to claim 66 , wherein the external closed loop is equipped with one or two selective filtering units; one positioned and operable to permit directional flow of oxidized active material from the device into the external closed loop and the regeneration device and a second positioned and operable to permit directional flow of regenerated active material from the regeneration device into the elec

Assignees

• H2Pro Ltd
• Technion Res & Development Found Ltd

Inventors

• Grader Gideon
• Rothschild Avner
• Dotan Hen
• Landman Avigail
• Kay Asaf
• Moshkovich Mordechay

Classifications

• C25B9/13 Primary

  Single electrolytic cells with circulation of an electrolyte · CPC title

• C25B1/04 Primary

  by electrolysis of water · CPC title

• C25B9/30

  Cells comprising movable electrodes, e.g. rotary electrodes; Assemblies of constructional parts thereof · CPC title

• C25B9/40

  Cells or assemblies of cells comprising electrodes made of particles; Assemblies of constructional parts thereof · CPC title

• C25B15/087

  Recycling of electrolyte to electrochemical cell · CPC title