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A system and method for electricity storage and synthesis gas production based on solid oxide batteries

A solid oxide, syngas technology, applied in fuel cells, electrical components, electrodes, etc., to avoid Ni oxidation, avoid Ni segregation, and easy to operate

Active Publication Date: 2021-09-21
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] However, the above technology still has application limitations, such as US6051125A, US9574274B2 and CN107180985 A are mainly used in the field of electrolysis (mode 3), the purpose is to use fuel chemical energy to replace a part of electric energy to reduce electrolysis energy consumption, and to prepare high-value syngas or hydrogen at the same time

Method used

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  • A system and method for electricity storage and synthesis gas production based on solid oxide batteries
  • A system and method for electricity storage and synthesis gas production based on solid oxide batteries
  • A system and method for electricity storage and synthesis gas production based on solid oxide batteries

Examples

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Effect test

example 1

[0060] In this example, the power generation / electrolysis cycle is carried out in the prepared button cell (GDC-Ni / YSZ|YSZ|YSZ-LSF / GDC), such as image 3 shown. In the power generation mode, the cathode side is fed with air, and the oxygen in it is reduced to oxygen ions; the anode is fed with CH 4 , oxygen ions enter the anode through the electrolyte to undergo a complete oxidation reaction with the fuel to generate H 2 O and CO 2 , and release electrons to the external circuit to achieve the purpose of power generation:

[0061] Cathode: 2O 2 +8e - →4O 2-

[0062] Anode: CH 4 +4O 2- →CO 2 +2H 2 O+8e -

[0063] The overall reaction is: CH 4 +2O 2 →CO 2 +2H 2 o

[0064] In electrolysis mode, the anode gas is unchanged and the cathode air is switched to CO 2 , CO 2 The electrons obtained from the external circuit at the cathode are decomposed into CO and O 2- , the generated CO escapes from the cathode; oxygen ions are conducted from the cathode to the anode...

example 2

[0070] In this example, the power generation / electrolysis cycle is carried out in the prepared button cell (GDC-Ni / YSZ|YSZ|YSZ-LSF / GDC), such as Figure 4 shown. In the power generation mode, the cathode side is fed with air, and the oxygen in it is reduced to oxygen ions; the anode is fed with CH 4 , oxygen ions enter the anode through the electrolyte to undergo a complete oxidation reaction with the fuel to generate H 2 O and CO 2 , and release electrons to the external circuit to achieve the purpose of power generation:

[0071] Cathode: 2O 2 +8e - →4O 2-

[0072] Anode: CH 4 +4O 2- →CO 2 +2H 2 O+8e -

[0073] The overall reaction is: CH 4 +2O 2 →CO 2 +2H 2 o

[0074] In electrolysis mode, the anode gas is unchanged, and the cathode air is switched to H 2 O, H 2 O gets electrons from the external circuit at the cathode and is decomposed into H 2 and O 2- , resulting in H 2 escape from the cathode; oxygen ions are conducted from the cathode to the anode...

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Abstract

The invention discloses a method for electricity storage and synthesis gas production based on a solid oxide battery, specifically a single solid oxide battery device to realize power generation / electrolysis and high-efficiency synthesis gas production by adjusting cathode gas. The solid oxide cell operates in two modes: during power generation, the cathode is fed with air and the anode with hydrocarbon fuel; during electrolysis, the cathode gas is switched to CO 2 or H 2 O, the anode is still fed with hydrocarbon fuel. The chemical energy of hydrocarbon fuel and oxygen is converted into electrical energy during the electrolysis process, and the electrical energy is converted into the chemical energy of syngas during the power generation process. The synthesis gas produced by the entire power generation / electrolysis process is an important raw material for the chemical industry. This electricity storage method is different from the traditional reversible fuel cell operation electricity storage method, only by changing the cathode gas mode can realize the switching between power generation and electrolysis, and at the same time can effectively reduce the electrolysis voltage, which is expected to improve the electrolysis efficiency.

Description

technical field [0001] The invention relates to the fields of energy storage and synthesis gas production, in particular a system and method for realizing power generation / electrolysis and synthesis gas production by adjusting cathode gas in a single solid oxide battery. Background technique [0002] At present, a large amount of fossil fuels are directly burned to generate electricity and generate heat, releasing a large amount of CO 2 , resulting in atmospheric CO 2 It is one of the main factors causing global climate change. Most countries, including China, have developed CO 2 emission reduction target. On the other hand, new energy power generation technologies such as wind power and photovoltaics are developing rapidly, and they account for an increasing share of my country's installed power generation capacity. However, both wind energy and solar energy have the characteristics of volatility, resulting in unstable power generation, difficulty in grid connection, an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/04082H01M8/04089H01M8/0656C25B1/23C25B1/042C25B11/091
CPCY02E60/36Y02E60/50
Inventor 韩敏芳张永亮
Owner TSINGHUA UNIV