A kind of preparation method of high specific surface area multi-stage pore diameter activated carbon

A high specific surface area, activated carbon technology, applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve the problems of small specific surface area and single pore size of activated carbon, achieve long preparation time, fast charge and discharge speed, and improve utilization rate Effect

Active Publication Date: 2016-06-15
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the activated carbon prepared by this patent has a small specific surface area and a single pore size.

Method used

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  • A kind of preparation method of high specific surface area multi-stage pore diameter activated carbon
  • A kind of preparation method of high specific surface area multi-stage pore diameter activated carbon
  • A kind of preparation method of high specific surface area multi-stage pore diameter activated carbon

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Experimental program
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Effect test

Embodiment 1

[0036] A preparation method of high specific surface multi-stage pore diameter activated carbon, the steps are as follows:

[0037] 1. Pretreatment of Enteromorpha: After the Enteromorpha is dried, pulverize and pass through a 40-mesh sieve to obtain Enteromorpha powder.

[0038] 2. Put the Enteromorpha powder into a porcelain crucible with a cover, place the crucible in a microwave digestion furnace to heat, control the heating rate at 20°C / min, and control the microwave power at 700W. After heating, the temperature of the material is kept at 450°C and heated for 10 minutes. After being released from the oven, enteromorpha carbonized material is obtained;

[0039] 3. Take Enteromorpha carbonized material and add it to the mortar, and then add sodium metaaluminate. The mass ratio of carbonized material to sodium metaaluminate is 1:3. After grinding for 20 minutes, according to the mass ratio of Enteromorpha carbonized material to 1: Add deionized water at a ratio of 1, stir e...

Embodiment 2

[0044] 1. Pretreatment of Enteromorpha: After the Enteromorpha is dried, pulverize and pass through a 40-mesh sieve to obtain Enteromorpha powder.

[0045] 2. Put the Enteromorpha powder into a porcelain crucible with a cover, and place the crucible in a microwave digestion furnace to heat. The heating rate is controlled at 18°C / min, and the microwave power is controlled at 800W. After heating, the temperature of the material is kept at 500°C, and heated for 15 minutes. After being released from the oven, enteromorpha carbonized material is obtained;

[0046] 3. Take Enteromorpha carbonized material and add it to the mortar, and then add sodium metaaluminate. The mass ratio of Enteromorpha carbonized material to sodium metaaluminate is 1:1. After grinding for 20 minutes, press the mass ratio of Enteromorpha carbonized material Add deionized water at a ratio of 0.5:1, stir evenly, and place the mixture in an oven at 105°C for 2.0 hours. Then the mixture was heated and activate...

Embodiment 3

[0048] 1. Pretreatment of Enteromorpha: After the Enteromorpha is dried, pulverize and pass through a 45-mesh sieve to obtain Enteromorpha powder.

[0049] 2. Put the Enteromorpha powder into a porcelain crucible with a cover, heat the crucible in a microwave digestion furnace, control the heating rate at 20°C / min, and control the microwave power at 900W. After heating, the temperature of the material is kept at 550°C and heated for 5 minutes After being released from the oven, enteromorpha carbonized material is obtained;

[0050] 3. Take Enteromorpha carbonized material and add it to the mortar, and then add sodium metaaluminate. The mass ratio of Enteromorpha carbonized material to sodium metaaluminate is 1:2. After grinding for 25 minutes, according to the mass ratio of Enteromorpha carbonized material Add deionized water at a ratio of 0.8:1, stir evenly, and place the mixture in an oven at 100°C for 3.0 hours. Then the mixture was heated and activated in a tubular heatin...

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Abstract

The invention relates to a method for preparing multistage-aperture activated carbon with high specific surface area. According to the method, a material containing carbon in enteromorpha is used as a carbon source; abundant inorganic salt on the enteromorpha surface is taken as a multistage structure guide template, and sodium metaaluminate is used as an activating agent. The method comprises the following steps: heating enteromorpha powder for 5-15 minutes under the conditions that the microwave power is 700-900W and the temperature is 350-550 DEG C, so as to obtain an enteromorpha carbonized material; grinding the enteromorpha carbonized material and sodium metaaluminate, adding deionized waterand evenly agitating; firstly baking and then heating the mixture at 650-850 DEG C for 0.5-2.0 hours, so as to prepare micropore-mesoporous-macropore multistage activated carbon powder, wherein the prepared activated carbon has a large specific surface area which reaches 3,000m<2> / g, the micropores / mesopores are developed, the aperture is of a multistage structure, the electrochemical property is excellent; meanwhile, a reasonable way is opened up for comprehensive utilization of the enteromorpha, and reclamation, high value and commercialization of the enteromorpha are achieved.

Description

technical field [0001] The invention relates to a method for preparing activated carbon with high specific surface area and multi-stage aperture, and belongs to the technical field of activated carbon preparation. Background technique [0002] Activated carbon, also known as activated carbon black, is black powder or granular amorphous carbon. As a traditional and novel carbon material, activated carbon has the characteristics of large specific surface area, good electrical conductivity, good chemical stability, good regeneration performance, large adsorption capacity and insoluble in most solvents, so it has been widely used in the chemical industry , gas enrichment and separation, food processing, electrode materials for supercapacitors, pharmaceutical refining, catalysts and catalyst carriers, military chemical protection and other fields. As a high-quality adsorbent and stable electrode material, activated carbon has become a research hotspot in the field of environment...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/12C01B32/324C01B32/348
Inventor 岳钦艳高原高宝玉孙媛媛黄德毅轩臻
Owner SHANDONG UNIV
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