IP Library › Granted Patent US 12,385,145
Granted Patent B2
US 12,385,145 · App. 17/864,187 · Granted Aug 12, 2025

Systems and methods for hydrogen recovery

Inventors: Arne Ballantine (Incline Village, NV); Chockkalingam Karuppaiah (Fremont, CA); Rasool Aghatehrani (Redwood City, CA)
Assignee: Ohmium International, Inc.
C25B1/02B01D53/26C01B3/50B01D2257/80
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Quick Facts
Patent No.
US 12,385,145
App. No.
17/864,187
Granted
Aug 12, 2025
Kind
B2
Abstract

A system for hydrogen recovery includes a dryer having an inlet that may be fluidly connected to a hydrogen outlet of a hydrogen generator, a hydrogen using device having an inlet fluidly connected to a dry hydrogen outlet of the dryer, and one or more conduits fluidly connecting a wet hydrogen outlet from the dryer and an impure hydrogen exhaust outlet of the hydrogen using device to the inlet of the dryer.

Claims (15)

1. A system for hydrogen recovery comprising:

a dryer comprising an inlet that may be fluidly connected to a hydrogen generator comprising an electrolyzer stack, wherein the dryer is a pressure swing adsorption (PSA) dryer, a temperature swing adsorption (TSA) dryer or a hybrid PSA-TSA dryer;

a hydrogen-using application comprising an inlet fluidly connected to a dry hydrogen outlet of the dryer and an outlet fluidly connected to the inlet of the dryer, such that a hydrogen exhaust stream from the outlet of the hydrogen-using application is recirculated to the inlet of the dryer.

2. The system of claim 1 , further comprising one or more pumps fluidly connected to the dryer, the hydrogen generator, the hydrogen-using application, or a combination thereof.

3. The system of claim 2 , each of the one or more pumps comprising an inlet fluidly connected to the hydrogen-using application and an outlet fluidly connected to the inlet of the dryer.

4. The system of claim 2 , further comprising one or more humidifiers fluidly connected to the dryer.

5. The system of claim 4 , each of the one or more humidifiers comprising an inlet and an outlet, the outlet fluidly connected to the one or more pumps.

6. The system of claim 2 , further comprising a purifier fluidly connected to the dryer.

7. The system of claim 6 , the purifier comprising an inlet fluidly connected to the dry hydrogen outlet of the dryer and an outlet fluidly connected to the inlet of the hydrogen-using application.

8. The system of claim 1 , further comprising at least one oxygen sensor.

9. The system of claim 1 , the dryer further comprising a wet hydrogen outlet fluidly connected to the inlet of the dryer.

10. The system of claim 3 , the dryer further comprising a wet hydrogen outlet fluidly connected to the inlet of at least one of the one or more pumps.

11. The system of claim 1 , further comprising a blending tank.

12. The system of claim 11 , the blending tank comprising an inlet fluidly connected to the outlet of the hydrogen-using application.

13. The system of claim 1 , further comprising an electrochemical hydrogen pump in fluid communication between the dry hydrogen outlet of the dryer and the inlet of the dryer.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Feb 28, 2023
From: AGHATEHRANI, RASOOL; BALLANTINE, ARNE; KARUPPAIAH, CHOCKKALINGAM
To: OHMIUM INTERNATIONAL, INC.
Reel/Frame 062834/0248 →
Priority Claims (1)
TW 111125595 · Jul 7, 2022 · national
Continuity (2)
Provisional Application 63221664 · Jul 14, 2021
Related Publication 20230015026A1 · Jan 19, 2023
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