A kind of preparation method of methanol fuel decomposition catalyst with high stability

A methanol fuel, high-stability technology, applied in electrolysis components, electrolysis process, electrodes, etc., can solve the problems of decreased activity, affect catalytic activity, reduce catalyst stability, etc., achieve increased activity, improve catalytic performance, inhibit liquid phase The effect of the formation of by-products

Active Publication Date: 2021-11-30
江苏优尚环境工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In view of the above-mentioned related technologies, the inventors believe that in the scheme of catalyzing methanol decomposition through catalysts, in the methanol decomposition catalyst, the particles doped in the catalyst will be thermally sintered and lead to agglomeration, so that the activity in the methanol decomposition reaction will drop rapidly, affecting its catalytic performance. activity, reducing the stability of the catalyst

Method used

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  • A kind of preparation method of methanol fuel decomposition catalyst with high stability
  • A kind of preparation method of methanol fuel decomposition catalyst with high stability

Examples

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Effect test

Embodiment 1

[0034]According to the molar ratio of Cu:Mg:Al 1:2:1, take copper nitrate, magnesium nitrate and aluminum nitrate and mix them respectively. According to the mass ratio of 1:25, take the mixture and add it to deionized water, stir and mix and collect the dissolved solution, according to the volume ratio of 1:1, add the dissolving solution to the 10% sodium carbonate solution by mass fraction, stir and mix and magnetically stir to obtain the base liquid, add dropwise 5% sodium hydroxide solution by mass fraction to the base liquid, stir and mix And control the pH of the matrix liquid to be 9. After the dropwise addition is completed, stir and mix and leave it to stand at room temperature for 3 hours, remove the lower layer of precipitate and place it at 75°C for crystallization treatment for 3 hours to obtain crystallized particles and wash them with deionized water After the washing liquid is neutral, then vacuum freeze-dry, crush and pass through a 500-mesh sieve, take the sie...

Embodiment 2

[0038] According to the molar ratio of Cu:Mg:Al 1:2.5:1, take copper nitrate, magnesium nitrate and aluminum nitrate and mix them respectively, according to the mass ratio of 1:25, take the mixture and add it to deionized water, stir and mix and collect the dissolved solution, according to the volume ratio of 1:1, add the dissolving solution to the 10% sodium carbonate solution by mass fraction, stir and mix and magnetically stir to obtain the base liquid, add dropwise 5% sodium hydroxide solution by mass fraction to the base liquid, stir and mix And control the pH of the matrix liquid to be 9. After the dropwise addition is completed, stir and mix and leave it to stand at room temperature for 4 hours, remove the lower precipitate and place it at 77°C for crystallization treatment for 4 hours to obtain crystallized particles and wash them with deionized water After the washing liquid is neutral, then vacuum freeze-dry, crush and pass through a 500-mesh sieve, take the sieved pa...

Embodiment 3

[0042] According to the molar ratio of Cu:Mg:Al 1:3:1, take copper nitrate, magnesium nitrate and aluminum nitrate and mix them respectively. According to the mass ratio of 1:25, take the mixture and add it to deionized water, stir and mix and collect the dissolved solution, according to the volume ratio of 1:1, add the dissolving solution to the 10% sodium carbonate solution by mass fraction, stir and mix and magnetically stir to obtain the base liquid, add dropwise 5% sodium hydroxide solution by mass fraction to the base liquid, stir and mix And control the pH of the matrix liquid to be 10. After the dropwise addition is completed, stir and mix and place it at room temperature for 3-5 hours of static aging, remove the lower precipitate and place it at 80°C for crystallization treatment for 5 hours to obtain crystallized particles and use deionized Wash with water until the washing liquid is neutral, then vacuum freeze-dry, crush and pass through a 500-mesh sieve, take the si...

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Abstract

The application relates to the field of catalyst materials, and specifically discloses a preparation method of a highly stable methanol fuel decomposition catalyst. The following preparation steps are included: S1, adding copper nitrate, magnesium nitrate and aluminum nitrate to deionized water, stirring and mixing with sodium carbonate solution to obtain a matrix liquid; S2, adjusting the pH of the matrix liquid, standing for aging, and removing the lower layer of precipitation and crystallization treatment, heat preservation and roasting to obtain matrix particles; S3, by weight parts, respectively weigh 45-50 parts of solvent, 0.5-1.0 parts of modified graphite particles and 3-5 parts of chloroplatinic acid and stir and mix to obtain a reaction solution ; S4, hydrothermal treatment under argon atmosphere, adjust the pH to 2.5, filter and collect the precipitate, wash, dry, crush and sieve. The application firstly prepares the hydrotalcite substrate, and then composites the graphite surface loaded with reduced platinum simple substance with the hydrotalcite substrate, which improves the activity of the methanol decomposition catalyst in the catalytic decomposition reaction and improves the stability of the catalyst.

Description

technical field [0001] The application relates to the field of catalyst materials, more specifically, it relates to a preparation method of a highly stable methanol fuel decomposition catalyst. Background technique [0002] The chemisorption and decomposition of methanol on a variety of metal surfaces has been extensively studied in recent years because methanol can serve as a new liquid energy carrier and is easily synthesized from biomass, coal, and natural gas, which are ore resources that are more abundant than crude oil, And it has become one of the most promising raw materials because of its low cost, easy operation and high energy. Methanol as a raw material has the following advantages: [0003] ① Methanol decomposition only needs methanol as a raw material, and can use the waste heat of the engine; [0004] ② Liquid methanol is more convenient in long-distance transportation; [0005] ③As long as there is a cost-effective catalyst, it can be converted into CO and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B1/02C25B11/091
CPCC25B1/02
Inventor 赵志远赵艳徐保安
Owner 江苏优尚环境工程有限公司
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