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Method for operating an electrolysis system and an electrolysis system

A technology of electrolysis system and electrolysis cell, which is applied in the direction of electrolysis process, electrolysis components, cells, etc., can solve problems such as increasing the cost of electrolysis process, and achieve the effect of saving cost.

Active Publication Date: 2014-10-08
SIEMENS ENERGY GLOBAL GMBH & CO KG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Both of these increase the cost of the electrolytic process

Method used

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  • Method for operating an electrolysis system and an electrolysis system
  • Method for operating an electrolysis system and an electrolysis system
  • Method for operating an electrolysis system and an electrolysis system

Examples

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Embodiment Construction

[0046] exist figure 1 is shown with the hydrogen used to generate H 2 and oxygen O 2 The electrolysis system 1 of the PEM electrolysis cell 2 . In the example shown, high-pressure electrolysis is carried out. However, the PEM electrolysis cell 2 can also be operated at atmospheric pressure.

[0047] The components of the PEM electrolysis cell 2 are a proton-permeable polymer membrane (Proton-Exchange-Membrane proton exchange membrane) not shown in detail here, which is connected on both sides to electrodes (anode, cathode) coated with catalyst. ) in contact. An external voltage is applied to the electrodes and water is delivered on the anode side of the PEM electrolysis cell 2 . Oxygen, electrons, and positively charged hydrogen ions are formed when water is split. Hydrogen ions diffuse through the proton-conducting membrane onto the cathode side, where they combine into hydrogen molecules H with the help of electrons from an external circuit 2 . From the PEM electroly...

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PUM

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Abstract

The efficiency of an electrolysis system (1) for generating hydrogen and oxygen by decomposing water in a PEM electrolyser (2) is increased by supplying process water (PW) to the PEM electrolyser, storing in a heat transfer medium (WM) waste heat produced during the decomposition of the process water (PW) in the PEM electrolyser (2), supplying the heat transfer medium (WM) to a low-temperature distillation system (10) and producing deionised water (DW) from raw water (RW) in the low-temperature distillation system (10) by means of the waste heat at operating temperatures between 60 DEG C and 100 DEG C, wherein only part, in particular less than 50%, of the deionised water (DW) is supplied as process water (PW) to the PEM electrolyser (2), and an industrial water stream (IW), comprising in particular more than 50% of the deionised water (DW), is diverted out of the electrolysis system (1) downstream of the low-temperature distillation system (10) and upstream of the PEM electrolyser (2).

Description

technical field [0001] The invention relates to a method and an electrolysis system for operating an electrolysis system for producing hydrogen and oxygen by splitting water. Background technique [0002] The fluid can be stored in the form of hydrogen or oxygen by splitting water into hydrogen and oxygen with the aid of an electrolyte. After the reaction, most of the introduced electrical energy is recovered in the chemical energy of the products hydrogen and oxygen (die Produkte Wasserstoff und Sauerstoff). However, in addition to the products hydrogen and oxygen, losses in the form of heat of reaction also form during the electrolysis. [0003] The electrolysis process is supplied with fresh water, which is usually completely desalinated, in particular distilled, water. To prevent minerals and other impurities from coating the electrode surfaces of the electrolytic cell, tap water is cleaned and deionized even before it is delivered to the electrolytic cell. In order t...

Claims

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Application Information

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IPC IPC(8): C25B1/10C25B15/08
CPCC25B15/08Y02E60/366C25B1/10C25B1/04C25B9/73Y02E60/36Y02P20/129
Inventor 托马斯·哈默迪特尔·莫斯特约亨·舍费尔马丁·塔肯贝格阿明·达茨克劳斯·登纳林诺贝特·胡贝尔安德烈亚斯·赖纳约亨·斯托柏维尔纳·斯托柏
Owner SIEMENS ENERGY GLOBAL GMBH & CO KG
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