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Porous metal nanometer granular catalyst and preparation method thereof

An alloy nano-particle and nano-particle technology is applied in the field of porous cobalt/nickel nano-particle catalyst and its preparation, which can solve the problems of small specific surface area and poor catalytic performance of the catalyst, so as to improve the reaction yield, reduce the reaction temperature and the reaction time. The effect of less pressure and fewer steps

Inactive Publication Date: 2013-04-24
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of small specific surface area and poor catalytic performance of catalysts in the hydrogenation reaction of organic compounds, the present invention proposes a method for preparing porous metal nanoparticle catalysts, which uses dealloying and ultrasonic technology to prepare porous metal nanoparticle catalysts. Granular catalyst

Method used

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  • Porous metal nanometer granular catalyst and preparation method thereof
  • Porous metal nanometer granular catalyst and preparation method thereof
  • Porous metal nanometer granular catalyst and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0078] The preparation of the porous cobalt metal nanoparticle catalyst comprises the following steps:

[0079] Step 1: Melting cobalt aluminum alloy ingots

[0080] Step 101: Cobalt metal with a mass percentage purity of 99.9% and metal aluminum with a mass percentage purity of 99.9% are smelted to obtain a first cobalt-aluminum alloy ingot;

[0081] Melting conditions include: arc working current 300A, arc center temperature is about 5700°C, melting time is 5 minutes, and the melting process is kept in an argon atmosphere of 0.08MPa; the purity of argon is 99.999% (volume percentage);

[0082] Dosage: Add 2.2g of cobalt metal to 1g of metal aluminum;

[0083] Step 102: cut off the arc, roll the first cobalt-aluminum alloy ingot, and continue melting under the melting conditions to obtain the second cobalt-aluminum alloy ingot;

[0084] Melting conditions include: arc working current 300A, arc center temperature is about 5700°C, melting time is 5 minutes, and the melting pr...

Embodiment 2

[0116] The preparation of the porous nickel metal nanoparticle catalyst comprises the following steps:

[0117] Step 1: Melting nickel-aluminum alloy ingots

[0118] Step 101: Under smelting conditions, metallic nickel with a mass percentage purity of 99.9% and metallic aluminum with a mass percentage purity of 99.9% is smelted to obtain a first nickel-aluminum alloy ingot;

[0119] Melting conditions include: arc working current 350A, arc center temperature is about 5900°C, melting time is 3 minutes, and the melting process is kept in an argon atmosphere of 0.06MPa; the purity of argon is 99.999% (volume percentage);

[0120] Dosage: Add 1.5g of metallic nickel to 1g of metallic aluminum;

[0121] Step 102: cut off the arc, roll the first nickel-aluminum alloy ingot, and continue melting under the melting conditions to obtain the second cobalt-nickel alloy ingot;

[0122] Melting conditions include: arc working current 350A, arc center temperature is about 5900°C, melting t...

Embodiment 3

[0154] The preparation of the porous cobalt metal nanoparticle catalyst comprises the following steps:

[0155] Step 1: Melting cobalt aluminum alloy ingots

[0156] Step 101: Cobalt metal with a mass percentage purity of 99.9% and metal aluminum with a mass percentage purity of 99.9% are smelted to obtain a first cobalt-aluminum alloy ingot;

[0157] Melting conditions include: arc working current 200A, arc center temperature is about 5400°C, melting time is 10 minutes, the melting process is kept in 0.1MPa argon atmosphere; the purity of argon is 99.999% (volume percentage);

[0158] Dosage: Add 3g of metal cobalt to 1g of metal aluminum;

[0159] Step 102: cut off the arc, roll the first cobalt-aluminum alloy ingot, and continue melting under the melting conditions to obtain the second cobalt-cobalt alloy ingot;

[0160] Melting conditions include: arc working current 200A, arc center temperature is about 5400°C, melting time is 10 minutes, the melting process is kept in ...

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Abstract

The invention discloses a porous cobalt / nickel nanometer granular catalyst and a preparation method thereof. The method comprises the following steps of: firstly reacting alloy nanometer grains containing an aluminum element with an alkali liquor to obtain porous metal nanometer grains; and then, separating the porous metal nanometer grains from a reaction solution, repeatedly cleaning until that the washing liquid PH value achieves neutrality, and finally storing the porous metal nanometer grains after cleaning in de-ionized water or an organic solution. By adopting the method for preparing the porous metal nanometer grains disclosed by the invention, the prepared nanometer grains are high in purity, large in specific surface area and uniform in grain fineness distribution; the preparation process is few in procedures and simple in required equipment; and hydrogenation reaction is carried out on the porous nanometer grains, so that the reaction temperature is reduced, the reaction yield is improved, the reaction rate is increased, and meanwhile, the secondary pollution is not inducted.

Description

technical field [0001] The invention relates to a catalyst material, more particularly to a porous cobalt / nickel nanoparticle catalyst applied to the hydrogenation reaction of organic compounds and a preparation method thereof. Background technique [0002] Nanoparticles have quantum size effect, small size effect, surface effect and macroscopic quantum tunnel effect. [0003] When the particle size of the porous metal material reaches the nanoscale, it exhibits a large specific surface area, which makes it have broad application prospects. Porous metal nanoparticles are a kind of material with great potential, which has broad application prospects in optics, catalysis, electronics, sensors, medicine and other fields. [0004] At present, there are many ways to prepare porous metal materials in laboratory and industrial production. Such as: template method, layer-by-layer self-assembly technology, dealloying method. However, the pore structure of porous metal particles pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755B01J23/75B01J35/10C07D307/44C07C31/125C07C29/141B82Y30/00B82Y40/00
Inventor 刘彤祝牧张同文
Owner BEIHANG UNIV
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