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Preparation method of methane steam reforming catalyst for fuel cell

A fuel cell and steam reforming technology, applied in fuel cells, battery electrodes, electrochemical generators, etc., can solve the problems of unstable catalyst structure, poor activity stability, and low activity rate, and achieve high thermal stability and toxicity resistance , stable structure and large pore size

Active Publication Date: 2018-06-22
SOUTHWEST RES & DESIGN INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Low activity rate and high stability to alkali metal ions
[0007] The catalyst of this patent is prepared by a precipitation method. The structure of the catalyst prepared by this preparation method is unstable, and the strength and specific surface decrease rapidly after reduction. As the catalyst strength and specific surface decrease, the catalyst activity decreases rapidly, resulting in relatively low activity stability. Difference

Method used

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  • Preparation method of methane steam reforming catalyst for fuel cell
  • Preparation method of methane steam reforming catalyst for fuel cell
  • Preparation method of methane steam reforming catalyst for fuel cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A preparation method for a catalyst for steam reforming of methane in a molten carbonate fuel cell, specifically comprising the following steps:

[0045] (1) Ball mill mixing: Add the three oxide powders of aluminum, zirconium and lanthanum into the ball mill according to the final composition ratio of the catalyst, and further crush and fully mix the three oxide powders by ball milling. The mixing time is 1 Hour.

[0046] (2) Powder molding: the powder prepared in step (1) is passed through a granulator to make uniform fine particle materials with a particle size of 10 mesh, and then the fine particle materials are added to a rotary tablet press or a hydroforming tablet press. , pressed into particles of prescribed shape.

[0047] (3) Pretreatment: The particles with the specified shape prepared in step (2) are kept at a temperature of 50°C and a pressure of 0.01Mpa for 1 hour;

[0048] (4) Calcination of the carrier: Calcining the particles with the specified shape ...

Embodiment 2

[0052] A preparation method for a catalyst for steam reforming of methane in a molten carbonate fuel cell, specifically comprising the following steps:

[0053] (1) Ball mill mixing: Add the three oxides of aluminum, zirconium and lanthanum into the ball mill according to the final composition ratio of the catalyst, and further crush and fully mix the three oxides by ball milling. The mixing time is 12 hours.

[0054] (2) Powder molding: the powder prepared in step (1) is passed through a granulator to make uniform fine particle materials with a particle size of 500 mesh, and then the fine particle materials are added to a rotary tablet press or a hydroforming tablet press. , pressed into particles of prescribed shape.

[0055] (3) Pretreatment: The particles with the specified shape prepared in step (2) are subjected to a temperature of 700°C and a pressure of 2.0Mpa for a residence time of 24h;

[0056] (4) Calcination of the carrier: Calcining the particles with the specif...

Embodiment 3

[0059] A preparation method for a catalyst for steam reforming of methane in a molten carbonate fuel cell, specifically comprising the following steps:

[0060] (1) Ball mill mixing: Add the three oxides of aluminum, zirconium and lanthanum into the ball mill according to the final composition ratio of the catalyst. The three oxides are further crushed and fully mixed by ball milling. The mixing time is 6 hours.

[0061] (2) Powder molding: the powder prepared in step 1 is passed through a granulator to make uniform fine particle materials with a particle size of 60 mesh, and then the fine particle materials are added to a rotary tablet press or a hydroforming tablet press. Granules compressed into prescribed shapes.

[0062] (3) Pretreatment: The particles of the specified shape prepared in step (2) are subjected to a temperature of 100°C, a pressure of 0.1Mpa, and a residence time of 5h;

[0063] (4) Calcination of the carrier: the pre-treated particles of the specified sha...

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Abstract

The invention belongs to the technical field of catalyst and particularly relates to a preparation method of a methane steam reforming catalyst for a fuel cell, especially a molten carbonate fuel cell. The method comprises the steps of ball-milling mixing, powder molding, pretreatment, carrier calcination and dipping decomposition. According to a preparation technology of using a dipping method, acatalyst carrier is firstly prepared and then the carrier is loaded with active components, so that the prepared catalyst is large in mean pore size and stable in structure, thereby further improvingthe alkali metal poisoning resistance of the catalyst, improving the activity stability and prolonging the service life of the catalyst.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to a method for preparing a catalyst used in fuel cells, especially for methane steam reforming in molten carbonate fuel cells. Background technique [0002] A molten carbonate fuel cell ("MCFC") is a high temperature fuel cell that generates electricity through an electrochemical reaction between a cathode, an anode, and an electrolyte mother plate between the cathode and anode. In this type of battery, a molten eutectic (such as a molten eutectic composed of lithium carbonate and potassium carbonate) impregnated in a carrier material (such as a film carrier composed of LiAlO2 / Al2O3) is used as a electrolyte. The hydrogen required for fuel cell operation is produced directly in the cell via the methane steam reforming reaction. The steam reforming reaction of methane is shown in the following example: CH4+H2O→CO+3H2 (1) CO+H2O→CO2+H2 (2) The first reaction is strong...

Claims

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Application Information

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IPC IPC(8): H01M4/90H01M4/88H01M8/0612
CPCH01M4/8803H01M4/9016H01M4/9075H01M8/0618Y02E60/50
Inventor 刘阳华波麦景红曾斌刘卫东彭国建谢昊杜勇杨娟郭游博杨丽芸
Owner SOUTHWEST RES & DESIGN INST OF CHEM IND
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