Preparation method and application of high-specific-surface porous carbon modified by coal-tar pitch

A technology of coal tar pitch and high specific surface area, applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve the problems that hinder the precise control of carbon material structure, high molecular aromaticity and condensation degree, and limit the application scope of carbon materials, etc. problems, to achieve the effect of improving the catalytic graphitization ability of porous carbon, high specific surface area, and good application prospects

Active Publication Date: 2018-04-13
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the complex composition of coal tar pitch, high molecular aromaticity and condensation degree, and poor thermal stability hinder the precise regulation of the structure of carbon materials and limit the application range of carbon materials.

Method used

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  • Preparation method and application of high-specific-surface porous carbon modified by coal-tar pitch
  • Preparation method and application of high-specific-surface porous carbon modified by coal-tar pitch
  • Preparation method and application of high-specific-surface porous carbon modified by coal-tar pitch

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Embodiment 1

[0037] The invention discloses a method for preparing porous carbon with high specific surface area modified by coal tar pitch. The specific steps are: directly activate the medium-temperature pitch in one step to obtain the pitch-based activated carbon. Add 1 mL of ammonia to 20 mL of deionized water. Add 0.125g of pitch-based activated carbon into the above solution, stir evenly, and ultrasonicate for 30min. Put the ultrasonicated mixture in a reaction kettle, which is a 50mL hydrothermal reaction kettle with a polytetrafluoroethylene liner and a stainless steel jacket, and put the reaction kettle in an oven at 80°C for 1 hour of hydrothermal reaction , the obtained solid was washed with deionized water until neutral, centrifuged, and the obtained solid was dried in an oven at 60°C for 8 hours to obtain a black solid powder, which was ground and placed in a tube furnace at a calcination temperature of 700°C. The time is 1 hour, and the coal tar pitch modified porous carbon ...

Embodiment 2

[0039]The invention discloses a method for preparing porous carbon with high specific surface area modified by coal tar pitch. The specific steps are: directly activate the medium-temperature pitch in one step to obtain the pitch-based activated carbon. Weigh 0.015625g of cobalt nitrate hexahydrate and dissolve in 30mL of deionized water, and add 1.5mL of ammonia water at the same time to form a homogeneous solution. Add 0.125g of pitch-based activated carbon into the above solution, stir evenly, and ultrasonicate for 30min. Place the ultrasonicated mixture in a reaction kettle, which is an 80mL hydrothermal reaction kettle with a polytetrafluoroethylene liner and a stainless steel jacket, and put the reaction kettle in an oven at 100°C for 1.5 hours of hydrothermal reaction , the resulting solid was washed with deionized water to neutrality, centrifuged, and the resulting solid was dried in an oven at 60°C for 8 hours to obtain a black solid powder, which was ground and place...

Embodiment 3

[0041] The invention discloses a method for preparing porous carbon with high specific surface area modified by coal tar pitch. The specific steps are: directly activate the medium-temperature pitch in one step to obtain the pitch-based activated carbon. Weigh 0.03125g of cobalt nitrate hexahydrate and dissolve in 40mL of deionized water, and add 2mL of ammonia water at the same time to form a homogeneous solution. Add 0.125g of pitch-based activated carbon into the above solution, stir evenly, and ultrasonicate for 30min. Put the ultrasonicated mixture in a reaction kettle, which is a 100mL hydrothermal reaction kettle with a polytetrafluoroethylene liner and a stainless steel jacket, and put the reaction kettle in an oven at 120°C for 2 hours of hydrothermal reaction , the resulting solid was washed with deionized water to neutrality, centrifuged, and the resulting solid was dried in an oven at 60°C for 8 hours to obtain a black solid powder, which was ground and placed in a...

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Abstract

The invention provides a preparation method for high-specific-surface porous carbon modified by coal-tar pitch. The preparation method comprises the following steps: dissolving cobalt nitrate in deionized water, carrying out stirring, and adding ammonia water; adding pitch-based active carbon obtained after one-step activation of coal-tar pitch and carrying out uniform mixing under stirring; subjecting a mixture obtained in the previous step to a hydro-thermal reaction and carrying out centrifugation; washing a solid obtained in the previous step and successively carrying out centrifugation, drying and grinding; and subjecting solid powder obtained after grinding to calcining in a tubular furnace in an inert gas environment so as to obtain the high-specific-surface porous carbon modified by the coal-tar pitch. The invention also provides a method for preparing a membrane electrode assembly for a fuel cell from the high-specific-surface porous carbon modified by the coal-tar pitch. Theporous carbon prepared in the invention has a high specific surface area and a porous structure, which is beneficial for transmission of substances like oxygen, so dependence on the precious metal Ptis greatly reduced; the raw material for preparation of the porous carbon is cheap coal-tar pitch; and the preparation method is simple in process, convenient to operate, low in cost, friendly to environment and suitable for industrial production.

Description

technical field [0001] The invention relates to the technical field of fuel cell electrochemical reduction catalyst and its preparation and application, in particular to a preparation method of coal tar pitch modified porous carbon with high specific surface area and its energy storage application. Background technique [0002] my country's iron and steel industry is huge. In 2014, coke production accounted for more than 50% of the world's total production. Coal tar is the main by-product in the coke production process, which is a complex mixture composed of nearly ten thousand kinds of condensed ring aromatic compounds. Due to the characteristics of high aromaticity, high condensation degree and high toxicity, the existing coal tar processing technology is not highly integrated, the processing process is extensive, the product value is low, and the ecological environment is seriously damaged. Light oil and naphthalene oil are mainly obtained by distillation and other means....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/33C01B32/354
Inventor 乔锦丽董芳王敏聂琪徐能能刘俊宇彭芦苇刘聪周玥
Owner DONGHUA UNIV
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