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Graphitized activated carbon preparing method

A technology of activated carbon and graphitization, which is applied in chemical instruments and methods, inorganic chemistry, carbon compounds, etc., can solve the problems of no practical large-scale industrial production of graphitized activated carbon, corrosion of catalyst metal materials, harsh equipment requirements, etc., and achieve convenient large-scale Large-scale industrial production, short reaction time, and improved productivity

Inactive Publication Date: 2019-03-01
冯良荣
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such a process has strict requirements on the equipment, the protective atmosphere requires external heating, high temperature requires high heat transfer efficiency, and the catalyst may cause corrosion to the metal materials of the heating equipment in particular.
At present, there is no practical method suitable for large-scale industrial production of graphitized activated carbon

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Add 1.0 tons of coal-based columnar activated carbon to the direct-heating rotary kiln at a rate of 100kg / h. The direct-heating rotary kiln rotates continuously, and the positive and negative electrodes in the direct-heating rotary kiln are filled with solid raw materials, and 1500A DC or AC current passes between the positive and negative electrodes. The material sequentially passes through the heating section (that is, the preheating section), the high temperature section between the positive and negative electrodes of the rotary kiln (that is, the heating section), and the cooling section is discharged. Nitrogen gas is fed into the discharge end of the rotary kiln, and the nitrogen flow rate is 20Nm 3 / h, the reaction tail gas is withdrawn from the feed end of the rotary kiln, and the material stays in the rotary kiln for 8h. The maximum temperature of the high temperature section in the rotary kiln is 1650°C. The obtained product has obvious graphite diffraction p...

Embodiment 2

[0031] Add 1.0 tons of sawdust impregnated with 2% nickel nitrate into the direct heating shaft kiln at a certain speed. The height of the direct heating shaft kiln is 6m, and the inner diameter of the furnace is 60cm. The two ends of the 3m-long middle section of the furnace are provided with positive and negative electrodes, which are used to feed 1000A current to the materials in this section. The bottom of the furnace is continuously discharged at a rate of 50kg / h, and the top of the furnace is continuously or intermittently fed with raw materials to maintain the material level. The material sequentially passes through the heating section (that is, the preheating section), the high temperature section between the positive and negative electrodes of the rotary kiln (that is, the heating section), and the cooling section is discharged. Nitrogen is fed into the discharge end of the direct heating shaft kiln, and the nitrogen flow rate is 20Nm 3 / h, the reaction tail gas is ...

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Abstract

The invention provides a graphitized activated carbon preparing method. The graphitized activated carbon preparing method comprises feeding materials into a direct heat-type rotary kiln or a direct heat-type shaft kiln with a protective atmosphere, conveying carbon materials sequentially a preheating section, a heating section and a cooling section and performing discharging treatment to obtain graphitized activated carbon; in the heating section, power electrodes are applied to directly electrifying the carbon materials and / or the materials converted during the heating process, and further the materials are heated through contact resistance of the materials in the heating section or the contact resistance between particles or blocks of the materials; the maximum temperature of the materials passing through the direct heat-type rotary kiln or the direct heat-type shaft kiln is not higher than 800 DEG C. The graphitized activated carbon preparing method has the advantages of being highin thermal efficiency, low in power consumption, good in product consistency, stable in process and high in productivity.

Description

technical field [0001] The invention belongs to the technical field of carbon materials and relates to a preparation method of graphitized activated carbon. Background technique [0002] Activated carbon has excellent properties such as high specific surface area, developed pore structure, rich surface functional groups, and partial conductivity. It is widely used in catalyst preparation, water treatment, air pollution treatment, extraction of mineral and pharmaceutical industries, batteries, secondary batteries, Supercapacitors and other fields have a wide range of applications. [0003] In recent years, with the application of activated carbon in the fields of batteries, secondary batteries, and supercapacitor electrode materials, the requirements for the conductivity of activated carbon have increased; in addition, when used as a catalyst carrier or catalyst, in some cases not only a suitable specific surface area and It also has certain requirements for high temperature...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/312C01B32/205
CPCC01B32/205C01B32/312Y02P20/10
Inventor 甘亚冯良荣
Owner 冯良荣
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