Preparation method for activated carbon with medium pore radii

A technology of activated carbon and coconut shell activated carbon is applied in the field of preparation of pore-sized activated carbon, which can solve the problems of high production cost and complicated process, and achieve the effect of mild reaction

Inactive Publication Date: 2015-09-09
WEIHAI WENLONG BATTERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The present invention solves the technical problems of complex process and high production cost of the existing medium-pore activated carbon preparation method, and provides a medium-pore activated carbon preparation method with relatively simple method and low cost

Method used

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  • Preparation method for activated carbon with medium pore radii
  • Preparation method for activated carbon with medium pore radii
  • Preparation method for activated carbon with medium pore radii

Examples

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Effect test

Embodiment 1

[0036] 500g wood activated carbon, 325 mesh, specific surface area 1850~1910m 2 / g, soak in 1.5L of 35% ethanol aqueous solution, the concentration of potassium hydroxide is 1mol / L, after stirring for 10 minutes, transfer it to an ultrasonic cleaner, adjust the ultrasonic frequency to 50Hz, and the ultrasonic power to 1W / cm 2 , after 1 hour, filter with suction, wash with 2L of water, wash 5 times in total, blow dry at 100°C for 2 hours, then transfer to a tubular muffle furnace, first vacuumize, then continuously feed nitrogen, and then rapidly heat up to 1700°C , After 1.5h of heat preservation, the mesoporous activated carbon with high conductivity can be obtained by natural cooling.

[0037] The particle size of activated carbon is 300-400 mesh, accounting for 92.7% of the total, 1.4% for 300 mesh or more, and 5.9% for 400 mesh or less (GB / T 12496.2-1999 Test method for wood activated carbon-determination of particle size distribution); the specific surface area is 2733m ...

Embodiment 2

[0039] 500g wood activated carbon, 120 mesh, specific surface area 1530m 2 / g, soak in 1.5L of 45% ethanol aqueous solution, the concentration of potassium hydroxide is 1.5mol / L, after stirring for 10 minutes, transfer to an ultrasonic cleaner, ultrasonic frequency 50Hz, ultrasonic power 1.5W / cm 2 , after 2 hours of ultrasonic time, filter with suction, wash with 2L water each time until neutral, and dry at 100°C for 2 hours, then transfer to a tubular muffle furnace, first vacuum, then nitrogen, and then quickly heat up To 2000°C, keep warm for 1.5h, then cool naturally.

[0040]The particle size of activated carbon is 100-150 mesh, accounting for 94.8% of the total, 0.8% above 100 mesh, and 4.4% below 400 mesh (GB / T 12496.2-1999 Determination of particle size distribution of wood activated carbon test method); the specific surface area is 2530m 2 / g, resistivity 1.73×10 -3 Ωm (four-probe resistivity measuring instrument), specific pore volume 2.17ml / g, average pore diamete...

Embodiment 3

[0042] 500g coal-based activated carbon, 100 mesh, specific surface area 1360m 2 / g, soak in 1.5L of 25% ethanol aqueous solution, the concentration of potassium hydroxide is 1mol / L, after stirring for 10 minutes, transfer it to an ultrasonic cleaner, the ultrasonic frequency is 50Hz, and the ultrasonic power is 1.5W / cm 2 , after 2 hours of ultrasonic time, filter with suction, wash with 2L water each time until neutral, and dry at 100°C for 2 hours, then transfer to a tubular muffle furnace, first vacuum, then nitrogen, and then quickly heat up To 2000°C, keep warm for 1.5h, then cool naturally.

[0043] The particle size of activated carbon is 80-120 mesh, accounting for 95.1% of the total, 1.9% above 100 mesh, and 4.4% below 120 mesh (GB / T 12496.2-1999 Test method for wood activated carbon-determination of particle size distribution); the specific surface area is 2530m 2 / g, resistivity 0.28×10 -3 Ωm (four-probe resistivity measuring instrument), specific pore volume 1.33...

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Abstract

The invention relates to a preparation method for activated carbon with medium pore radii, and solves the technical problem that the conventional preparation method is complex in technology and high in manufacturing cost. According to the preparation method, the activated carbon is prepared by processing one or more of the following raw materials: wood-based activated carbon, coconut shell-based activated carbon and coal-based activated carbon. The preparation method comprises the following specific steps: soaking one or more of the raw materials in an ethanol-water mixed solution; under the condition that a hydroxide is taken as a pore-enlarging agent, carrying out ultrasonic oscillation, and then carrying out washing and drying; under the protection of inert gas, carrying out calcination to obtain a product, namely the activated carbon. The pore radii (r) of the prepared activated carbon are larger than 2 nm and smaller than 50 nm. The preparation method provided by the invention can be widely applied to the field of preparation of the activated carbon with medium pore radii.

Description

technical field [0001] The invention relates to the field of battery materials, in particular to a method for preparing activated carbon with medium pore size. Background technique [0002] Activated carbon has excellent physical and chemical stability, developed pore structure and high adsorption capacity, and is widely used in food, chemical, environmental protection, pharmaceutical and new energy and other related industries. In particular, mesoporous activated carbon (pore size 2nm<r<50nm) has been widely used in some new application fields, such as catalyst carrier, battery electrode, supercapacitor, gas storage and biomedicine. Among them, the research and development of highly conductive mesoporous activated carbon in battery and supercapacitor energy storage electrode materials has attracted more and more attention. [0003] Activated carbon as an energy storage material must have a large specific surface area, because the larger the specific surface area, the...

Claims

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Application Information

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IPC IPC(8): C01B31/12
Inventor 林海亭韩家军程瑾宁
Owner WEIHAI WENLONG BATTERY
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