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 s

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
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Example Embodiment

[0043] Example 1

[0044] The preparation method of the catalyst for methane steam reforming in molten carbonate fuel cell specifically includes the following steps:

[0045] (1) Ball milling mixture: Add the three oxide powders of aluminum, zirconium and lanthanum to the ball mill according to the final requirements of the catalyst. The three oxide powders are further crushed and thoroughly mixed by ball milling. The mixing time is 1 hour.

[0046] (2) Powder molding: the powder prepared in step (1) is made into uniform fine particles with a particle size of 10 mesh through a granulator, and then the fine particles are added to the rotary tablet press or hydraulic forming tablet press In the process, it is pressed into granules of prescribed shape.

[0047] (3) Pretreatment: Put the particles of the specified shape prepared in step (2) at a temperature of 50°C, a pressure of 0.01Mpa, and a residence time of 1 hour;

[0048] (4) Carrier calcination: the pre-processed particles of the ...

Example Embodiment

[0051] Example 2

[0052] The preparation method of the catalyst for methane steam reforming in molten carbonate fuel cell specifically includes the following steps:

[0053] (1) Ball milling compound: The three oxides of aluminum, zirconium and lanthanum are added to the ball mill according to the final requirements of the catalyst, and the three oxides are further broken and thoroughly mixed by ball milling. The mixing time is 12 hours.

[0054] (2) Powder molding: the powder prepared in step (1) is made into fine particles of uniform particles with a particle size of 500 mesh through a granulator, and then the fine particles are added to the rotary tablet press or hydraulic forming tablet press In the process, it is pressed into granules of prescribed shape.

[0055] (3) Pretreatment: Put the particles of the prescribed shape prepared in step (2) at a temperature of 700°C, a pressure of 2.0Mpa, and a residence time of 24h;

[0056] (4) Carrier calcination: the pre-processed particle...

Example Embodiment

[0058] Example 3

[0059] The preparation method of the catalyst for methane steam reforming in molten carbonate fuel cell specifically includes the following steps:

[0060] (1) Ball milling compound: The three oxides of aluminum, zirconium and lanthanum are added to the ball mill according to the final requirements of the catalyst, and the three oxides are further broken and thoroughly mixed by ball milling. The mixing time is 6 hours.

[0061] (2) Powder molding: the powder prepared in step 1 is made into fine particles of uniform particles with a particle size of 60 mesh through the granulator, and then the fine particles are added to the rotary tablet press or the hydraulic forming tablet press. Press into granules of prescribed shape.

[0062] (3) Pretreatment: Put the particles of the prescribed shape prepared in step (2) at a temperature of 100°C, a pressure of 0.1Mpa, and a residence time of 5h;

[0063] (4) Carrier calcination: the particles of the prescribed shape pretreated...

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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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