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Monatomic catalyst doped with rare earth element and used for hydrogenation of organic hydrogen storage medium and preparation method of monatomic catalyst

A technology of rare earth elements and catalysts, applied in the field of catalytic materials

Active Publication Date: 2021-07-06
QINGDAO CHUANGQI XINNENG CATALYSIS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, patent CN112246236A discloses a low-carbon alkane chromium-based dehydrogenation catalyst containing a spinel structure and its preparation method. The dehydrogenation catalyst improves the performance of the dehydrogenation catalyst without increasing the amount of precious metals by adding rare earth elements. Stability and selectivity, but the dehydrogenation catalyst still has problems such as dehydrogenation reaction at a higher temperature

Method used

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  • Monatomic catalyst doped with rare earth element and used for hydrogenation of organic hydrogen storage medium and preparation method of monatomic catalyst
  • Monatomic catalyst doped with rare earth element and used for hydrogenation of organic hydrogen storage medium and preparation method of monatomic catalyst
  • Monatomic catalyst doped with rare earth element and used for hydrogenation of organic hydrogen storage medium and preparation method of monatomic catalyst

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Effect test

Embodiment 1

[0034] Weigh 18.75g of Al(NO 3 ) 3 9H 2 O and 0.868g of Ce(NO 3 ) 3 ·6H 2 O was dissolved in 500 mL of deionized water, stirred at room temperature at a speed of 300 r / min for 10 min, then 2 mL of polyethylene glycol 400 was added as a dispersant, and stirred for 15 min to obtain a mixed solution. At the same time, ammonia water with a mass fraction of 5 wt% was prepared, ammonia water was added dropwise to the mixed solution under stirring, and the pH of the solution was adjusted to 9.0, and then the stirring reaction was kept for 40 minutes, and then the stirring was turned off. The precipitate was separated by vacuum filtration, and the obtained precipitate was washed with deionized water for 3 times, then placed in a constant temperature 90°C water bath for 4 hours to crystallize, after the crystallization was completed, it was washed with absolute ethanol for 3 times, and then placed in a 100°C oven Dry for 10 hours to obtain a catalyst carrier precursor. The cataly...

Embodiment 2

[0039] Weigh 18.75g of Al(NO 3 ) 3 9H 2 O and 0.866g of La(NO 3 ) 3 ·6H 2 O was dissolved in 500 mL of deionized water, stirred at room temperature at a speed of 300 r / min for 10 min, then 2 mL of polyethylene glycol 400 was added as a dispersant, and stirred for 15 min to obtain a mixed solution. At the same time, ammonia water with a mass fraction of 5 wt% was prepared, ammonia water was added dropwise to the mixed solution under stirring, and the pH of the solution was adjusted to 9.0, and then the stirring reaction was kept for 40 minutes, and then the stirring was turned off. The precipitate was separated by vacuum filtration, and the obtained precipitate was washed with deionized water for 3 times, then placed in a constant temperature 90°C water bath for 4 hours to crystallize, after the crystallization was completed, it was washed with absolute ethanol for 3 times, and then placed in a 100°C oven Dry for 10 hours to obtain a catalyst carrier precursor. The cataly...

Embodiment 3

[0044] Weigh 18.75g of Al(NO 3 ) 3 9H 2 O and 0.766g of Y (NO 3 ) 3 ·6H 2 O was dissolved in 500 mL of deionized water, stirred at room temperature at a speed of 300 r / min for 10 min, then 2 mL of polyethylene glycol 400 was added as a dispersant, and stirred for 15 min to obtain a mixed solution. At the same time, ammonia water with a mass fraction of 5 wt% was prepared, ammonia water was added dropwise to the mixed solution under stirring, and the pH of the solution was adjusted to 9.0, and then the stirring reaction was kept for 40 minutes, and then the stirring was turned off. The precipitate was separated by vacuum filtration, and the obtained precipitate was washed with deionized water for 3 times, then placed in a constant temperature 90°C water bath for 4 hours to crystallize, after the crystallization was completed, it was washed with absolute ethanol for 3 times, and then placed in a 100°C oven Dry for 10 hours to obtain a catalyst carrier precursor. The cataly...

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Abstract

The invention discloses a monatomic catalyst doped with a rare earth element and used for dehydrogenation of an organic hydrogen storage medium. The catalyst comprises a carrier and active components, wherein the active components comprise Pt, Ru and Rh, the three components are dispersed on the carrier in a monatomic form, and the loading amount of the active components on the carrier is 1-5 wt% in terms of a mass ratio of the active components to the carrier; and the carrier is Al2O3 doped with one or more rare earth metals selected from Ce, La and Y, and the total content of the rare earth metals is not more than 5 wt%. According to the invention, rare earth metal doping is used for realizing modification of the carrier, so the activity of the catalyst for catalyzing the dehydrogenation reaction of the organic hydrogen storage medium is effectively improved, the dehydrogenation reaction of the hydrogen storage medium can be realized at lower temperature and lower pressure, and the purity of hydrogen in a product is improved.

Description

technical field [0001] The invention belongs to the field of catalytic materials, and in particular relates to a single-atom catalyst doped with rare earth elements for dehydrogenation of an organic hydrogen storage medium and a preparation method thereof. Background technique [0002] With the development of new energy technology, hydrogen energy has become one of the important energy carriers in the future human society due to its advantages such as high calorific value, environmental friendliness, and abundant resources. In recent years, the hydrogen energy industry has continued to develop, and the equipment and technology of hydrogen production and hydrogen consumption have gradually developed and improved. However, the long-distance hydrogen storage and transportation technology that connects the two has not yet achieved a breakthrough. At present, the mainstream hydrogen transportation methods are still high-pressure gaseous hydrogen storage and liquid hydrogen storag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/63B01J29/12C07C5/10C07C13/18
CPCB01J23/63B01J29/126C07C5/10B01J2229/186C07C2523/63C07C2529/12C07C13/18Y02E60/32
Inventor 张傑梁鑫赵宏
Owner QINGDAO CHUANGQI XINNENG CATALYSIS TECH CO LTD
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