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High-dispersity activated carbon supported metal catalyst and preparation method thereof

A metal catalyst, high-dispersion technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, chemical instrument and method, physical/chemical process catalyst, etc., can solve the impact, unfavorable dispersion and stability of loaded metal And other problems, to achieve good stability, high catalytic activity and stability, high dispersion effect

Pending Publication Date: 2022-07-15
TIANJIN DAGU CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, activated carbon produced in industrial batches contains more impurities and carbon fragments, which will adversely affect the dispersion and stability of loaded metals.

Method used

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  • High-dispersity activated carbon supported metal catalyst and preparation method thereof
  • High-dispersity activated carbon supported metal catalyst and preparation method thereof
  • High-dispersity activated carbon supported metal catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Mix 6g of activated carbon with 300mL and 6mol / L of hydrochloric acid, stir magnetically for 24 hours at room temperature, then wash with deionized water until neutral, and dry at 150°C for 24 hours to obtain activated carbon washed with hydrochloric acid. like figure 1 and figure 2 As shown, through transmission electron microscope observation, the impurity particles on the surface are obviously reduced, and the surface is more regular.

Embodiment 2

[0028] Mix 6 g of activated carbon with 300 mL of 6 mol / L nitric acid, stir magnetically for 24 hours at room temperature, then wash with deionized water until neutral, and dry at 150°C for 24 hours to obtain nitric acid-washed activated carbon. like image 3 As shown, through transmission electron microscope observation, the impurity particles on the surface are obviously reduced, and the surface is more regular.

Embodiment 3

[0030] Weigh 10.45mg of chloroauric acid tetrahydrate reagent and dissolve it in 10mL of aqua regia, then add dropwise to 5g of activated carbon after acid washing with hydrochloric acid and stir evenly. After drying in a vacuum oven for 24 hours, a hydrochloric acid-modified activated carbon-supported gold catalyst with a high-dispersion gold loading of 0.1 wt% was obtained. like Figure 4 As shown, through transmission electron microscope observation, the surface of the activated carbon is uniformly distributed with highly dispersed gold particles with a particle size of 1-3 nm.

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Abstract

The invention discloses a high-dispersity activated carbon supported metal catalyst and a preparation method thereof, and belongs to the technical field of inorganic chemical synthesis. The preparation method comprises the following steps: firstly, pickling activated carbon, and drying to obtain purified and modified activated carbon; and impregnating the purified and modified activated carbon with a metal salt solution, taking out and drying to obtain the high-dispersion activated carbon supported metal catalyst. The loading capacity of metal particles on the activated carbon in the catalyst is 0.05-0.5 wt%, the particle size of the obtained activated carbon metal-loaded catalyst is 1-3nm, and the activated carbon metal-loaded catalyst is uniform in distribution and good in dispersion. Activated carbon is purified and modified through acid pickling before loading, impurities are removed, oxygen-containing functional groups are increased, and dispersion anchoring of metal species is facilitated. The activated carbon supported metal catalyst prepared by adopting an equivalent-volume impregnation method has the advantages of high dispersity and uniform size, and can show good stability and relatively high catalytic activity in a catalytic reaction.

Description

technical field [0001] The invention belongs to the technical field of inorganic chemical synthesis, and in particular relates to a highly dispersive activated carbon-supported metal catalyst and a preparation method thereof. Background technique [0002] The surface of activated carbon has developed pore structure and high specific surface area, and the surface is rich in functional groups such as oxygen and nitrogen, and is resistant to acid and alkali corrosion, making activated carbon a commonly used catalyst or catalyst carrier, which is widely used in various petrochemical industries. Reactions (such as oxidation, reduction, dehydrogenation, polymerization and hydrocracking, etc.) are also used as adsorbents, desiccants, desulfurizers and water purification agents. In addition, the price of activated carbon as a catalyst carrier is low compared to other carriers, such as metal oxide carrier silica, titania, cerium oxide, etc. Therefore, in terms of surface chemical fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/52B01J23/89B01J35/00
CPCB01J23/52B01J23/8926B01J35/394
Inventor 王华伟任跃功王雷杨晨刘洪阳刁江勇
Owner TIANJIN DAGU CHEM CO LTD
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