Method for preparing metal or metallic oxide/carbon composite material

A technology of carbon composite materials and oxides, applied in metal/metal oxide/metal hydroxide catalysts, catalyst activation/preparation, chemical instruments and methods, etc. diameter, harsh reaction conditions, complex process, etc., to achieve the effect of simple and easy operation, controllable output, and simple preparation process route

Inactive Publication Date: 2009-03-04
DALIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Traditional metal or metal oxide / carbon composite materials synthesis methods mainly include liquid phase impregnation method, adsorption method, ion exchange method, etc., but these methods are cumbersome and complicated.
The subsequent development of methods for preparing metal or metal oxide / carbon composite materials, such as sol-gel method, hydrothermal solvothermal carbonization reduction method, organic precursor pyrolysis carbonization method, etc., introduces metals simultaneously in the process of synthesizing carbon materials. component, which greatly simplifies the process, but these methods cannot effectively control the pore size distribution of the carbon support or the particle size of the metal particles, and the reaction conditions are harsh

Method used

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  • Method for preparing metal or metallic oxide/carbon composite material
  • Method for preparing metal or metallic oxide/carbon composite material

Examples

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Embodiment 1

[0033] Cobalt / carbon composites were prepared using asphaltenes in coal direct liquefaction residue as carbon source, polyethylene glycol as porogen, and cobalt nitrate as metal precursor. The specific steps are as follows: 1. Weigh 50g of coal direct liquefaction residue without any treatment, crush it and pass through an 80-mesh sieve. The residue powder is Soxhlet extracted with n-hexane at 92°C for 50 hours, and the obtained insoluble matter is dried and ground through 80 mesh. Mesh sieve, extracted with toluene at 140°C for 50h, the toluene soluble matter was evaporated under reduced pressure at 80°C by a rotary evaporator to remove the toluene solvent, and the obtained solid was asphaltene. 2. Raise the asphaltene from room temperature to 300°C at a rate of 1°C / min in the air, and keep it at this temperature for 4 hours for pre-oxidation treatment. 3. Mix and grind the pre-oxidized asphaltenes, polyethylene glycol (molecular weight 6000) and cobalt nitrate ground through...

Embodiment 2

[0035] Cobalt / carbon composites were prepared using pre-asphaltenes in coal direct liquefaction residue as carbon source, polyethylene glycol as porogen, and cobalt nitrate as metal precursor. The specific steps are as follows: 1. Weigh 50g of coal direct liquefaction residue without any treatment, crush it and pass through an 80-mesh sieve. The residue powder is Soxhlet extracted with n-hexane at 92°C for 50 hours, and the obtained insoluble matter is dried and ground through 80 mesh. Mesh sieve, extracted with toluene at 140°C for 50h, the extracted insoluble matter was dried, ground into powder and passed through a 80 mesh sieve, after THF was extracted at 92°C for 50h, the obtained THF soluble matter was extracted with a rotary evaporator The solid substance obtained after removing the tetrahydrofuran solvent by evaporating under reduced pressure at 50°C is pre-asphaltene. 2. Mix and grind the pre-asphaltenes, polyethylene glycol (molecular weight 6000) and cobalt nitrate ...

Embodiment 3

[0037] Cobalt oxide / carbon composites were prepared using asphaltenes in coal direct liquefaction residues as carbon source, polyethylene glycol as porogen, and cobalt nitrate as metal precursor. The specific steps are as follows: 1. Weigh 40g of coal direct liquefaction residue without any treatment, crush it and pass through an 80-mesh sieve. The residue powder is Soxhlet extracted with n-hexane at 92°C for 50 hours, and the obtained insoluble matter is dried and ground through 80-mesh sieve. Mesh sieve, extracted with toluene at 140°C for 50h, the toluene soluble matter was evaporated under reduced pressure at 80°C by a rotary evaporator to remove the toluene solvent, and the obtained solid was asphaltene. 2. Raise the asphaltene from room temperature to 300°C at a rate of 1°C / min in the air, and keep it at this temperature for 4 hours for pre-oxidation treatment. 3. Mix and grind the pre-oxidized asphaltenes, polyethylene glycol (molecular weight 6000) and cobalt nitrate g...

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Abstract

The invention belongs to the scientific and technical field of carbon materials, and provides a method for preparing metal or metal oxide/carbon composite materials by asphaltine. The method takes the by-product asphaltine in the coal liquefaction process as a carbon source, takes a pyrolytic polymer as a pore-forming agent, and takes easily-pyrolytic metal salt as a metal precursor; and then the metal or the metal oxide/carbon composite materials are prepared by one step after the physical blending and carbonizing reductive treatment. The metal or the metal oxide/carbon composite materials prepared by the method have the controllable appearance that the metal or the metal oxide is uniformly dispersed in a carbon carrier with the grain diameter of 3-50nm. The preparation process has simple routes, mild conditions, conventional equipment, low cost, and controllable output of products, and is suitable for mass production. The prepared metal or the prepared metal oxide/carbon composite materials can be used as a highly-active catalyst, an adsorbent, a magnetic separation material, an electrode material and the like.

Description

technical field [0001] The invention belongs to the scientific and technical field of carbon materials, a branch of inorganic non-metallic materials science and technology, and relates to a method for preparing metal or metal oxide / carbon composite materials by using asphaltenes, a by-product of direct liquefaction of coal, as a carbon source. Background technique [0002] With the increase of global oil extraction and the reduction of reserves, the gap in oil supply is getting bigger and bigger, which directly leads to the rapid rise of oil prices. As a coal-rich and oil-poor country, China is considered to be the most feasible and important technical approach to solve the oil shortage, realize high-tech conversion of coal and sustainable development of the coal industry by using coal as raw material instead of oil to vigorously develop coal-based clean energy. Coal liquefaction technology is an advanced clean coal technology that converts solid coal into liquid fuels, chem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J37/12B01J37/08B01J23/74
Inventor 周颖邱介山王六平刘小雪
Owner DALIAN UNIV OF TECH
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