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Device and method for electrochemically utilizing carbon dioxide

A carbon dioxide, electrochemical technology, applied in the direction of electrodes, electrolysis components, electrolysis process, etc., can solve problems such as the limitation and influence of value product selection

Active Publication Date: 2020-10-30
SIEMENS ENERGY GLOBAL GMBH CO & KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Furthermore, the choice of these metals as cathode material disadvantageously leads to severe limitations in the choice of value products: the value products produced in carbon dioxide electrolysers depend decisively on the reaction mechanism, on which the cathode material in turn has a major influence

Method used

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  • Device and method for electrochemically utilizing carbon dioxide

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Embodiment Construction

[0026] figure 1 An exemplary embodiment of an electrolysis device with an electrolysis cell 1 , a cathode chamber 2 and an anode chamber 3 is shown. In the anode compartment 3 there is a cation-selective membrane 4 on which an anode 5 is directly applied. The cation-selective membrane 4 is cation-selective, in particular by immobilizing negative charges, in this example by means of deprotonated sulfonic acid groups, ie mainly cations are able to pass through the membrane. In the cathode compartment 2 there is an anion-selective polymer 7 on which the cathode 6 is applied directly. The anion-selective polymer is characterized in that the polymer passes through the quaternary amine NR 4 + Modified, so mainly negatively charged ions are able to pass through this layer.

[0027] In the electrolytic cell 1 there is pure water as an electrolyte. Carbon dioxide decomposes at cathode 6 and co-forms hydroxide OH with water - . The hydroxide OH - Anion-selective polymers typical...

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Abstract

The invention relates to an electrolysis device for the electrochemical utilization of carbon dioxide, said electrolysis device comprising at least one electrolysis cell, wherein said electrolysis cell comprises an anode chamber with an anode and a cathode chamber with a cathode, in said anode chamber A cation-permeable first membrane is arranged between the cathode compartment and the anode directly adjoins said first membrane, and a layer comprising an anion-selective polymer is arranged between the first membrane and the cathode.

Description

technical field [0001] The invention relates to a method and an electrolysis device for the electrochemical utilization of carbon dioxide. Background technique [0002] The demand for electricity fluctuates strongly with the time of day. As the proportion of electricity generated by renewable energy sources rises, the amount of power generation also fluctuates over time throughout the day. In order to be able to balance the oversupply of electricity during periods of high sun and strong winds when the demand for electricity is low, adjustable power plants or accumulators are required to store this energy. [0003] One currently considered solution is the conversion of electrical energy into value products, especially base chemicals or synthesis gas. Electrolysis is a viable technology for converting electrical energy into valuable products. [0004] The electrolysis of water into hydrogen and oxygen is known in the art. In recent years, however, the electrolysis of carbo...

Claims

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Application Information

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IPC IPC(8): C25B11/03C25B11/04C25B13/08C25B1/00C25B3/04C25B9/10C25B9/19C25B3/25C25B9/23
CPCC25B13/08C25B1/00C25B3/25C25B9/23C25B11/031C25B11/075
Inventor H.兰德斯E.M.费尔南德斯桑奇斯M.哈内布思
Owner SIEMENS ENERGY GLOBAL GMBH CO & KG
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