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
4 Cites 27 Cited by

AI-Extracted Technical Summary

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...
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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.

Application Domain

Technology Topic

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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

Examples

  • Experimental program(12)
  • Effect test(1)

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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Description & Claims & Application Information

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Classification and recommendation of technical efficacy words

  • Improve economic efficiency
  • Simple preparation process
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