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Hollow carbon sphere supported metal particle catalyst as well as preparation method and application thereof

A granular catalyst and hollow carbon sphere technology, applied in the field of catalysis, can solve the problems of active metal loss, catalyst deactivation, etc., and achieve the effects of small activity loss, improved selectivity and stability

Active Publication Date: 2021-11-16
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved in the present invention is to overcome the problems of active metal loss in the high-temperature liquid phase environment and catalyst deactivation in the prior art, and provide a hollow carbon sphere-supported metal particle catalyst with high-temperature liquid phase stability and its preparation method and use

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  • Hollow carbon sphere supported metal particle catalyst as well as preparation method and application thereof
  • Hollow carbon sphere supported metal particle catalyst as well as preparation method and application thereof
  • Hollow carbon sphere supported metal particle catalyst as well as preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0036] A highly stable hollow carbon-supported nickel-based catalyst is prepared by mixing hollow carbon and metal nickel at a mass ratio of 1:0.15. Wherein the preparation method of hollow carbon spheres and the loading method of metal nickel are as follows:

[0037] S1. Add 3ml of ammonia water to the mixed solution of 70ml of ethanol and 10ml of water. Then 3.56 ml of tetraethylsilicate was added quickly to the above solution under vigorous stirring. Stirring was continued until a white suspension was formed, then 0.4 g of resorcinol and 0.56 ml of formaldehyde aqueous solution were added thereto, and stirring was continued for 24 hours. The obtained khaki solid was centrifuged, washed with deionized water and absolute ethanol several times, and dried;

[0038] S2. The dried product is raised to 700°C at a rate of 2°C / min under a nitrogen atmosphere and kept for 5 hours to fully carbonize the phenolic resin on the surface.

[0039] S3. Then weigh 1 g of the carbonized so...

Embodiment 2

[0048] A highly stable hollow carbon-supported copper-based catalyst is prepared by mixing hollow carbon and metal copper at a mass ratio of 1:0.1. Wherein the preparation method of hollow carbon spheres and the loading method of metal copper are as follows:

[0049] S1. Add 3ml of ammonia water to the mixed solution of 70ml of ethanol and 10ml of water. Then 3.56 ml of tetraethylsilicate was added quickly to the above solution under vigorous stirring. Stirring was continued until a white suspension was formed, then 0.3 g of resorcinol and 0.56 ml of formaldehyde aqueous solution were added thereto, and stirring was continued for 24 hours. The obtained khaki solid was centrifuged, washed with deionized water and absolute ethanol several times, and dried;

[0050] S2. The dried product is raised to 700°C at a rate of 2°C / min under a nitrogen atmosphere and kept for 5 hours to fully carbonize the phenolic resin on the surface.

[0051] S3. Then weigh 1 g of the carbonized sol...

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Abstract

The invention belongs to the field of catalysis, and particularly relates to a hollow carbon sphere supported metal particle catalyst as well as a preparation method and application thereof. The catalyst is composed of a hollow carbon sphere shell layer and metal particles distributed on the inner surface of the hollow carbon sphere shell layer. The preparation method comprises the following steps: preparing phenolic resin-coated silicon dioxide nanospheres, preparing a carbon-coated silicon dioxide material, preparing hollow carbon spheres, and preparing the hollow carbon sphere supported metal particle catalyst. The size of the hollow carbon sphere can be controlled by controlling the size of the silicon spheres, and the thickness of the sphere shell can be controlled by controlling the amount of resorcinol and formaldehyde. The prepared catalyst has a large internal cavity, the coating degree of the active metal is low, the active metal is protected through the space confinement effect of the shell layer, the activity loss is very small, the stability is high, and the inactivation problem caused by metal component loss, agglomeration and the like in the catalysis process is solved. The catalyst can be applied to catalysis of furfural water-phase hydrogenation for preparation of cyclopentanone and water-phase hydrodeoxygenation reaction of vanillin.

Description

technical field [0001] The invention belongs to the field of catalysis, and in particular relates to a metal particle catalyst supported by hollow carbon spheres, a preparation method and application thereof. Background technique [0002] Catalysts are an essential part of the industrial production of chemicals. Most of today's chemical production reactions need to be carried out in a liquid phase system, and the separation of catalysts has become a problem that needs to be solved. Heterogeneous catalyst is a kind of catalyst, which is widely favored because it is easy to separate from the reaction system after the reaction, which greatly reduces the cost of the production process. The heterogeneous catalysts used today are mostly supported metal catalysts, composed of oxides (such as SiO 2 , Al 2 o 3 etc.) or carbon materials (such as activated carbon, graphene, carbon black, etc.) as the carrier of the catalyst, while the metal acts as the catalytic active center. Oxi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755B01J23/72B01J35/02C07C45/59C07C49/395C07C41/26C07C43/23B01J35/00
CPCB01J23/755B01J23/72C07C45/59C07C41/26B01J35/40C07C49/395C07C43/23
Inventor 汪国忠陈春胡之付珍
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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