Method for preparing nitrogen-doped porous carbon from heavy organic component in coal liquefaction residue

A technology of coal liquefaction residue and nitrogen doping, applied in chemical instruments and methods, inorganic chemistry, carbon compounds, etc., to achieve the effect of easy large-scale production, low equipment requirements, and simple preparation process

Active Publication Date: 2013-09-11
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the process of coal liquefaction, coal liquefaction residue is an unavoidable by-product, which accounts for about 20-30% of the total amou

Method used

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  • Method for preparing nitrogen-doped porous carbon from heavy organic component in coal liquefaction residue
  • Method for preparing nitrogen-doped porous carbon from heavy organic component in coal liquefaction residue
  • Method for preparing nitrogen-doped porous carbon from heavy organic component in coal liquefaction residue

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Experimental program
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Example Embodiment

[0027] Example 1

[0028] The coal liquefaction residue is mixed with tetrahydrofuran, and the solvent is evaporated after extraction to obtain carbon-rich heavy organic components; the heavy organic components and dicyandiamine are mixed at a mass ratio of 1:0.5, and pre-oxidized at 300 ℃ in the air for 1 h , Get the nitrogen-rich carbon source; place the obtained nitrogen-rich carbon source in a tube furnace at 50 mL / min of N 2 In the atmosphere, the temperature is increased to 1000 ℃ at a rate of 10 ℃ / min, and the CO with a flow rate of 50 mL / min is switched 2 , Activate for 1 h, after completion, switch to 50mL / min N 2 , Cooling to room temperature, nitrogen-doped porous carbon is obtained. The main properties of the porous carbon are shown in Table 1.

Example Embodiment

[0029] Example 2

[0030] The coal liquefaction residue is mixed with tetrahydrofuran, and after extraction, the solvent is evaporated to obtain carbon-rich heavy organic components; the heavy organic components and ammonium chloride are mixed in a mass ratio of 1:5, and pre-oxidized at 150 ℃ in the air for 10 h, Obtain the nitrogen-rich carbon source; place the obtained nitrogen-rich carbon source in a tube furnace, in an Ar atmosphere of 300 mL / min, heat up to 800 ℃ at a rate of 5 ℃ / min, and switch the H with a flow rate of 50 mL / min 2 O, activate for 10 h. After completion, switch to 300 mL / min Ar and cool to room temperature to obtain nitrogen-doped porous carbon. The main properties of the porous carbon are shown in Table 1.

Example Embodiment

[0031] Example 3

[0032] The coal liquefaction residue is mixed with tetrahydrofuran, after extraction, the solvent is evaporated to obtain carbon-rich heavy organic components; the heavy organic components and urea are mixed at a mass ratio of 1:2, and pre-oxidized at 200 ℃ in the air for 3 h to obtain rich Nitrogen carbon source; the obtained nitrogen-rich carbon source is placed in a tube furnace, heated to 500 ℃ at a rate of 1 ℃ / min under a He atmosphere of 250 mL / min, and the flow rate is 100 mL / min O 2 After activation for 2 hours, switch to 250 mL / min helium gas and cool to room temperature to obtain nitrogen-doped porous carbon. The main properties of the porous carbon are shown in Table 1.

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Abstract

The invention provides a method for preparing nitrogen-doped porous carbon from a heavy organic component in a coal liquefaction residue, which belongs to the field of preparation technology for carbon materials. The method comprises the following steps: subjecting the coal liquefaction residue to solvent extraction so as to obtain a heavy organic component; mixing the obtained component with a nitrogen source and carrying out preoxidation treatment so as to obtain a nitrogen-rich carbon source; and with the nitrogen-rich carbon source as a raw material, preparing the nitrogen-containing porous carbon with a high specific area by respectively using physical activation, chemical activation or a template method. The method provided by the invention has the characteristics of simple process, a wide selection range of the nitrogen source and the like and provides a novel approach for high-added value utilization of the coal liquefaction residue. The prepared nitrogen-doped porous carbon can be extensively used in fields like electrode materials, adsorption materials and catalyst carriers.

Description

technical field [0001] The invention relates to a method for preparing nitrogen-doped porous carbon by using heavy organic components of coal liquefaction residue as a raw material, and belongs to the technical field of carbon material preparation. Background technique [0002] Coal liquefaction to oil is an important way and measure to alleviate the shortage of oil resources by using abundant coal resources. The energy structure characteristic of rich coal and little oil is an important prerequisite for my country to use this technology. Coal liquefaction is the process of converting coal from a solid state to a liquid state. Usually, under the action of high-pressure hydrogen and a catalyst, the coal is heated to 400~460 °C to cause a chemical reaction in the solvent to convert the organic macromolecules in the coal Clean coal technology for liquid oils and chemicals. However, coal liquefaction residue, a by-product, is unavoidable in the coal liquefaction process, accoun...

Claims

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Application Information

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IPC IPC(8): C01B31/02C01B32/33C01B32/336C01B32/342C01B32/348
Inventor 周颖邱介山刘哲孙利王春雷赵强王道龙侯雨辰金新新
Owner DALIAN UNIV OF TECH
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