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Systems and methods for electrochemical processes

An electrochemical and process technology, applied in the direction of chemical instruments and methods, electrodes, electrodialysis, etc., can solve the problems of Faraday efficiency reduction, safe operation range limitation, hydrogen volume increase, etc.

Pending Publication Date: 2022-04-29
拉普兰塔拉登理工大学
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In cases where the current ripple causes the instantaneous current density to approach zero or even reach zero, the safe operating range of the water electrolysis system is limited due to the non-optimal quality of the supplied DC current due to the Faradaic efficiency at smaller current densities decreases and the amount of hydrogen on the oxygen side increases

Method used

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  • Systems and methods for electrochemical processes
  • Systems and methods for electrochemical processes
  • Systems and methods for electrochemical processes

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Embodiment Construction

[0022] The specific examples provided in the description given below should not be construed as limiting the scope and / or applicability of the appended claims. The lists and groups of examples provided in the description given below are not exhaustive unless expressly stated otherwise.

[0023] figure 1 A system for an electrochemical process is illustrated, according to exemplary and non-limiting embodiments. The system includes an electrochemical reactor 101 for containing a liquid and including electrodes for directing electrical current to the liquid. exist figure 1 , the two electrodes are denoted by reference numerals 102 and 103 . exist figure 1 In the exemplary system shown, electrochemical reactor 101 includes a stack of electrolytic cells. The electrolysis cell may contain, for example, an alkaline liquid electrolyte for alkaline water electrolysis. In this exemplary case, the liquid electrolyte may include, for example, aqueous potassium hydroxide "KOH" or aqu...

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Abstract

A system for an electrochemical process comprises an electrochemical reactor (101), a converter bridge (104) for providing a direct current to electrodes (102, 103) of the electrochemical reactor, and a serial inductor (107) connected to alternating voltage terminals of the converter bridge. The converter bridge comprises a bi-directional controllable switch (111, 112) between a DC voltage terminal and an AC voltage terminal of the converter bridge. Forced commutation of the bi-directional controllable switch enables reduction of current ripples in the direct current provided to the electrochemical reactor. The forced commutation also enables control of the power factor of the AC power supply of the system.

Description

technical field [0001] The present disclosure relates to a system for an electrochemical process such as, for example, electrolysis or electrodialysis. Additionally, the present disclosure relates to a method for providing electrical power to an electrochemical process. Background technique [0002] The electrochemical process for providing electrical power to the process liquid may be, for example, an electrolysis process or an electrodialysis process. Electrolysis can be used, for example, to split water into hydrogen gas H 2 and oxygen O 2 of water electrolysis. A widely used type of water electrolysis is alkaline water electrolysis, in which the electrodes are operated in an alkaline liquid electrolyte which may include, for example, aqueous potassium hydroxide "KOH" or aqueous sodium hydroxide "NaOH". The electrodes are separated by a porous separator that is electrically non-conductive, thereby avoiding electrical short circuits between the electrodes. The porous ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J5/00H02M7/219H02M1/088C25B9/65C25B1/04
CPCH02J5/00H02M7/219H02M1/088C25B9/65C25B1/04B01D61/463B01D61/422C25B13/04C25B1/16C25B15/02B01D61/52B01D2313/365C25B9/73C25B9/70H02M1/14H02M1/4208C25B9/77Y02E60/36C25B9/17C25B11/00C25B13/00H02M7/162
Inventor 约纳斯·科波宁韦萨·鲁斯卡宁安蒂·科索宁安东·波卢埃克托夫杰罗·阿霍拉马库·涅梅莱
Owner 拉普兰塔拉登理工大学