High pressure electrolysis cell for hydrogen production from water

A high-voltage electrolysis and electrolysis cell technology, applied in electrolysis components, electrolysis process, electrodes, etc., can solve problems such as damage and impact of electrolysis cells

Inactive Publication Date: 2010-11-17
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The efficiency of this type of electrolyzer is mainly limited by the reaction of oxygen evolution at the anode
Also, the high pressure limits of these electrolyzers may be adversely affected by the diffusion of hydrogen gas through the diaphragm and into the oxygen chamber where it combines with oxygen in an exothermic reaction, wherein this heat of formation may adversely affect the gas flow associated with the electrolyzer. One or more elastic components, including elastic hoses connected to gas outlets, which can eventually lead to damage to the electrolyzer

Method used

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  • High pressure electrolysis cell for hydrogen production from water
  • High pressure electrolysis cell for hydrogen production from water
  • High pressure electrolysis cell for hydrogen production from water

Examples

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example 1

[0075] To illustrate the increase in cell efficiency of the exemplary embodiment cell 110 of FIG. 2 for the cell 10 of FIG. 1 , theoretical calculations of different cell efficiencies can be made based on the assumption that the cells 10, 110 are of the same size. . Additionally, the dimensions of the components were based on measurements made on the Avalence Hydrofiller 50-6500-50RG system described above.

[0076] Therefore, the length (1) of the electrolytic cell 10, 110 is set to approximately 1219 mm. The inner diameter of the outer pressure vessel barrel (i.e., the inner cylindrical surface 12a of the cathode 12 in FIG. 1 and the inner cylindrical surface 118a of the anode 118 in FIG. 2) may be about 42.9 millimeters, which gives a calculated surface area of ​​about 1640 square centimeters. The outer diameter of the conductive center post (ie, the outer cylindrical surface 18a of the anode 18 in FIG. 1 and the outer cylindrical surface 112a of the cathode 12 in FIG. 2) ...

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Abstract

Exemplary embodiments include a method or apparatus for improving the electrolysis efficiency of high-pressure electrolysis cells by decreasing the current density at the anode and reducing an overvoltage at the anode while decreasing the amount of hydrogen permeation through the cell membrane from the cathode chamber to the anode chamber as the high-pressure electrolysis cell is operated.

Description

technical field [0001] The field to which the present disclosure generally relates includes electrolyser apparatus and methods for the production of high-pressure hydrogen by electrolysis of water. Background technique [0002] Water electrolysis means that water (H 2 O) decomposes into oxygen (O 2 ) and hydrogen (H 2 ). [0003] Traditional alkaline water electrolyzers work by placing two electrodes in a liquid electrolyte, such as potassium hydroxide (KOH) in water. One electrode acts as the anode and the other acts as the cathode, and they are separated from each other by an ion-selective but gas-impermeable diaphragm or cell membrane. When a voltage is applied between the electrodes, a current flows through the electrolyte between the electrodes. Hydrogen is produced at the cathode and oxygen at the anode. The separator keeps hydrogen and oxygen separated as the resulting gas bubbles escape from the liquid electrolyte. The efficiency of such electrolyzers is mainl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B15/02C25B1/10C25B11/08C25B9/19
CPCC25B1/12C25B9/00Y02E60/366Y02E60/36C25B1/04C25B9/05C25B9/73C25B9/19
Inventor N·A·凯莉T·L·吉布森D·B·乌维克尔克
Owner GM GLOBAL TECH OPERATIONS LLC
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