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Method for preparing honeycomb-shaped activated carbonwith high specific surface area

A technology of honeycomb activated carbon and high specific surface area, which is applied in the field of preparation of honeycomb activated carbon and high specific surface area honeycomb activated carbon, can solve the problems of low specific surface area and less developed pore structure, achieve high specific surface area, reduce production cost, The effect of simple process flow

Inactive Publication Date: 2017-10-10
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Under the protection of high-temperature inert gas, after carbonization at 700-800 °C for 1-2 hours, it was activated with water vapor at 700-900 °C for 1-3 hours, and the specific surface area and total pore volume were prepared to be 657m 2 / g and 0.352mL / g honeycomb activated carbon, but the specific surface area is low and the pore structure is not well developed

Method used

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  • Method for preparing honeycomb-shaped activated carbonwith high specific surface area

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Effect test

Embodiment 1

[0028] The waste powdered activated carbon produced by chemical decolorization of sugar liquid is crushed and ground to more than 100 meshes, and the waste powdered activated carbon is mixed with the binder coal tar according to the mass ratio of waste powdered activated carbon and high-temperature coal tar of 1:2.0, and the Refined in a kneader at 100°C to make a plasticized material; then extruded in a honeycomb ceramic pipe extruder, and extruded in a honeycomb mold under a pressure of 10MPa to obtain a honeycomb embryo; put the honeycomb embryo in a drying oven In the process, dry at 80°C for more than 24h; carbonize the dried honeycomb body in a tunnel-type carbonization furnace at 600°C for more than 5h, and finally activate the carbonized honeycomb body in a tunnel-type activation furnace at 850°C 2h, honeycomb activated carbon was prepared. Its performance is shown in Table 1.

Embodiment 2

[0030] The chemical waste powdery activated carbon produced by the decolorization of sugar solution is crushed and ground to more than 100 meshes, and the waste powdery activated carbon is mixed with the binder coal tar according to the mass ratio of waste powdered activated carbon and low-temperature coal tar of 1:2.0, and the Refined in a kneader at 100°C to make a plasticized material; then extruded in a honeycomb ceramic pipe extruder, and extruded in a honeycomb mold under a pressure of 10MPa to obtain a honeycomb body; put the honeycomb body in a drying box, Dry at 80°C for more than 24 hours; carbonize the dried honeycomb body in a tunnel-type carbonization furnace at 600°C for more than 5 hours, and finally activate the carbonized honeycomb body in a tunnel-type activation furnace at 850°C for 2 hours. Honeycomb activated carbon was prepared. Its performance is shown in Table 1.

Embodiment 3

[0032] The chemical waste powdery activated carbon produced by the decolorization of sugar solution is crushed and ground to more than 200 meshes, and the waste powdery activated carbon is mixed with the binder coal tar according to the mass ratio of waste powdery activated carbon and high-temperature coal tar of 1:2.0, and the Refining in a kneader for 2 hours at 100°C for plasticization; then extruding in a honeycomb ceramic extruder, extruding in a honeycomb mold to obtain a honeycomb body; drying the honeycomb body in a drying oven at 80°C More than 24 hours; carbonize the dried honeycomb body in a tunnel-type carbonization furnace at 800°C for more than 5 hours, and finally activate the carbonized honeycomb body in a tunnel-type activation furnace at 850°C for 2 hours to prepare honeycomb activated carbon . Its performance is shown in Table 1.

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Abstract

The invention discloses a method for preparing honeycomb-shaped activated carbonwith high specific surface area. The methodcomprises the following steps: 1) crushing and grinding waste powder activated carbon to be100 meshes or greater, mixing the waste powdered activated carbon andcoal tar in a mass ratio of 1:(0.5-3), and smelting at 60-150 DEG C for 1-3 hours in a kneading machine,so as to obtain a plasticized material; 2) extruding the plasticized material in a honeycomb ceramic tube extruder, and performing extrusion molding in a honeycomb mold, so as to obtain a honeycomb blank; 3) putting the molded honeycomb blank into a drying oven, drying for 12-72 hours at 80-110 DEG C, and cooling, so as to obtain a honeycomb blank; 4) carbonizing the dried honeycomb blank at 600-900 DEG C in a carbonization furnace, and cooling, so as to obtain a carbonized material; 5) performing steam activation on the honeycomb carbonized materialat 800-1000 DEG C for 1-2 hours in an activation furnace, thereby obtaining the honeycomb-shaped activated carbon. The honeycomb-shaped activated carbon prepared with the method has the characteristics of being high in strength, large in specific surface area, large in adsorption capacity, small in pressure loss, good in acid and alkali resistance and the like, and meanwhile the purpose of recycling waste powdered activated carbon is achieved.

Description

technical field [0001] The invention belongs to the technical field of honeycomb activated carbon, and relates to a method for preparing honeycomb activated carbon with a high specific surface area, in particular to a method for preparing honeycomb activated carbon by mixed extrusion molding of waste powdery activated carbon and coal tar. Background technique [0002] Honeycomb activated carbon is a new type of composite functional activated carbon with many parallel channels in its internal configuration. They not only have the advantages of high specific surface area, controllable pore structure, and acid and alkali resistance of traditional activated carbon, but also have a unique honeycomb structure. It has the advantages of high efficiency, larger geometric surface area, short diffusion path, wear resistance, and strong anti-dust pollution ability. Compared with traditional activated carbon, the biggest advantage of honeycomb activated carbon is that its pressure loss i...

Claims

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Application Information

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IPC IPC(8): C01B32/324C01B32/336B01J20/20B01J20/28
CPCB01J20/20B01J20/28011B01J20/28045B01J20/28064B01J20/28066B01J20/28073C01P2006/12C01P2006/14
Inventor 左宋林胡贺
Owner NANJING FORESTRY UNIV
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