Coconut shell-based mesoporous activated carbon, and preparation method and application thereof

A coconut shell-based, activated carbon technology, applied in chemical instruments and methods, inorganic chemistry, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of chemical reagent activated carbon residues, high prices of titanium salts, and achieve pore size distribution The effect of wide range, simple preparation process and high mesoporosity

Pending Publication Date: 2021-06-11
INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the preparation process of the adsorbent, the price of titanium salt used is relatively high, and the chemical reagents used are prone to residues on the surface of activated carbon.

Method used

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  • Coconut shell-based mesoporous activated carbon, and preparation method and application thereof
  • Coconut shell-based mesoporous activated carbon, and preparation method and application thereof
  • Coconut shell-based mesoporous activated carbon, and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0053] This embodiment provides a kind of coconut shell-based mesoporous activated carbon, and the preparation method of the coconut shell-based mesoporous activated carbon is as follows:

[0054] (1) Grind and sieve the coconut shell carbonized material, the particle size is 40-50 mesh, wash with deionized water, dry at 105°C for 6 hours and set aside;

[0055] (2) According to the mass ratio of iron to carbonized material of 0.25:100, weigh ferric nitrate of corresponding quality, add it to 40mL of water and ethanol mixture with a volume ratio of 4:1, after ferric nitrate is fully dissolved, add 10g coconut shell carbonized material, and impregnated with stirring at 400r / min for 24h, separated by suction filtration with neutral filter paper, and then dried at 105°C for use;

[0056] (3) Take 10g of the impregnated iron salt carbonized material obtained in step (2) and transfer it to a steel activation tube and place it in an activation furnace. After heating up to an activat...

Embodiment 2

[0062] This embodiment provides a kind of coconut shell-based mesoporous activated carbon, and the preparation method of the coconut shell-based mesoporous activated carbon is as follows:

[0063] (1) Grind and sieve the coconut shell carbonized material, the particle size is 50-60 mesh, wash with deionized water and dry at 110°C for 4 hours for use;

[0064] (2) According to the mass ratio of iron to carbonized material of 0.25:100, weigh the corresponding mass of ferric chloride, add it to 40mL of water and ethanol mixture with a volume ratio of 4:1, and after the ferric chloride is fully dissolved, add 10g of coconut shell carbonized material, stirred and impregnated for 20h under the condition of 450r / min, separated by suction filtration with neutral filter paper, dried at 105°C for use;

[0065] (3) Take 10g of the impregnated iron salt carbonized material obtained in step (2) and transfer it to a steel activation tube and place it in an activation furnace. After heating ...

Embodiment 3

[0071] The only difference between this embodiment and embodiment 1 is that the mass ratio of iron to carbonized material in step (2) is 0.1:100, and other conditions and parameters are exactly the same as in embodiment 1.

[0072] Through the nitrogen adsorption and desorption isotherm test, the specific surface area of ​​the sample prepared in this embodiment is calculated by using the BET and BJH methods to be 833.69m 2 / g, the total pore volume is 0.86cm 3 / g, mesoporosity is 72.78%, BJH average pore diameter is 10.08nm.

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Abstract

The invention provides coconut shell-based mesoporous activated carbon, and a preparation method and application thereof. The preparation method comprises the following steps: (1) grinding and sieving a coconut shell carbonized material to obtain 20-60-mesh coconut shell carbonized material particles; (2) dissolving ferric salt, adding the coconut shell carbonized material particles obtained in the step (1), and stirring and dipping to obtain a dipped ferric salt carbonized material; and (3) activating the ferric salt-impregnated carbonized material obtained in the step (2), and pickling to obtain the coconut shell-based mesoporous activated carbon. According to the invention, the coconut shell carbonized material is used as a raw material, through a carbon thermal reduction coupling catalytic activation method, the purposes of one-step pore-forming and pore-expanding are realized by using nano zero-valent iron formed by carbon thermal reduction to catalyze the gasification reaction of carbon and carbon dioxide, and the prepared activated carbon has the advantages of large specific surface area, developed pore structure, high mesopore rate and wide pore size distribution range.

Description

technical field [0001] The invention belongs to the technical field of preparation of environment-friendly materials, and in particular relates to a coconut shell-based mesoporous activated carbon and a preparation method and application thereof. Background technique [0002] As a widely used carbonaceous adsorption material, activated carbon has excellent properties such as good adsorption performance, high chemical inertness and good electrical conductivity. Its adsorption performance is mainly determined by the physical pore structure of activated carbon and the chemical properties of the pore surface. Normally, the micropore surface area of ​​activated carbon accounts for more than 90% of the total surface area, so its adsorption capacity is mainly determined by the micropores. When the pore diameter of activated carbon is more than 3-6 times the molecular diameter of the adsorbate, the resistance of the molecular movement of the adsorbate is small; on the contrary, it ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/324C01B32/336B01J23/745
CPCC01B32/324C01B32/336B01J23/745
Inventor 徐清馨刘学蛟汪印
Owner INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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