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Method and device for supplementing molten carbonate fuel cell electrolyte

A molten carbonate and fuel cell technology, applied in molten electrolyte fuel cells, fuel cell additives, fuel cell control, etc., can solve problems such as damage to the battery structure, and achieve the effect of avoiding time-consuming

Pending Publication Date: 2021-10-19
HUANENG POWER INTERNATIONAL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the defects in the prior art that the electrolyte can only be replenished at room temperature and damage the battery structure, thereby providing a method and device for replenishing the electrolyte of molten carbonate fuel cells

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  • Method and device for supplementing molten carbonate fuel cell electrolyte
  • Method and device for supplementing molten carbonate fuel cell electrolyte

Examples

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Embodiment 1

[0037] This embodiment provides a method for supplementing molten carbonate fuel cell electrolyte, the specific steps are as follows:

[0038] Heat lithium iodide to 520°C to form steam;

[0039] Carbon dioxide and oxygen are heated to 520°C, and the above steam is passed into the cathode chamber of the molten carbonate fuel cell at the same time, wherein the molar ratio of lithium iodide to carbon dioxide and oxygen is 1.8:0.9:0.3, and the reaction occurs, The flow rate of carbon dioxide and oxygen was controlled at 5L / min to generate carbonate until the electrolyte replenishment was completed.

Embodiment 2

[0041] This embodiment provides a method for supplementing molten carbonate fuel cell electrolyte, the specific steps are as follows:

[0042] Heat lithium iodide to 550°C to form steam;

[0043] Heat carbon dioxide and oxygen to 550°C, and pass the above steam into the cathode chamber of the molten carbonate fuel cell at the same time, in which the molar ratio of lithium iodide to carbon dioxide and oxygen is 2:1:0.5, and react to form carbon acid salt, wherein the flow rate of carbon dioxide and oxygen is controlled at 6L / min until the electrolyte replenishment is completed, and the unreacted raw materials and the generated halide vapor are cooled and recycled.

Embodiment 3

[0045] This embodiment provides a method for supplementing molten carbonate fuel cell electrolyte, the specific steps are as follows:

[0046] Heat lithium iodide to 600°C to form steam;

[0047] Carbon dioxide and oxygen are heated to 600°C, and the above steam is passed into the cathode chamber of the molten carbonate fuel cell at the same time, wherein the molar ratio of lithium iodide to carbon dioxide and oxygen is 2.2:1.1:0.6, and the reaction occurs to form carbon acid salt, wherein the flow rate of carbon dioxide and oxygen is controlled at 7L / min until the electrolyte replenishment is completed, and the unreacted raw materials and the generated halide vapor are cooled and recycled.

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Abstract

The invention belongs to the technical field of molten carbonate fuel cell electrolyte, and relates to a method and device for supplementing molten carbonate fuel cell electrolyte. The method comprises the following steps of: heating alkali metal halide to a first temperature to form steam; and heating carbon dioxide and oxygen to a second temperature, and introducing the carbon dioxide, the oxygen and the steam into the cathode chamber of the molten carbonate fuel cell at the same time, so as to make the alkali metal halide react with the carbon dioxide and oxygen to generate carbonate, thereby completing electrolyte supplementing. According to the method, firstly, the alkali metal halide is gasified, then the preheated carbon dioxide and oxygen are introduced, the lithium carbonate is generated in the cathode chamber of the molten carbonate fuel cell by utilizing the chemical reaction, an electrolyte supplementing effect is realized; and the method is applied for the first time in the field. The problems of long time consumption and low efficiency caused by cooling of the fuel cell in a traditional method are avoided. The added electrolyte can solve the problem of electrolyte deficiency caused by long-period operation of the fuel cell.

Description

technical field [0001] The invention belongs to the technical field of molten carbonate fuel cell electrolytes, and in particular relates to a method and device for supplementing molten carbonate fuel cell electrolytes. Background technique [0002] Molten carbonate fuel cell is a high-temperature fuel cell power generation technology, which uses carbonate (potassium carbonate, lithium carbonate, sodium carbonate) gas, etc.). Its modularization can realize the rapid installation of fuel cells, and is suitable for distributed or fixed power stations, and has been widely used in various countries in the world. [0003] Molten carbonate fuel cells include bipolar plates, electrodes (anode: nickel, cathode: nickel oxide), etc. The working principle is electrochemical reaction, the anode is the reaction of hydrogen and carbonate to generate water, carbon dioxide and electrons, and the cathode is oxygen and Carbon dioxide reacts with the electrons transported by the anode to for...

Claims

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Application Information

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IPC IPC(8): H01M8/14H01M8/04298
CPCH01M8/14H01M8/04298Y02E60/50
Inventor 卢成壮张瑞云李昊程健杨冠军黄华白发琪
Owner HUANENG POWER INTERNATIONAL
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