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Method for preparing activated carbon through self-activation method

A technology for the preparation of activated carbon and self-activation, which is applied in chemical instruments and methods, inorganic chemistry, carbon compounds, etc., can solve the problems of high production cost, high equipment corrosion, and difficult recovery, so as to improve the preparation quality and production efficiency, and achieve good Application prospect, effect of reducing preparation cost

Inactive Publication Date: 2017-04-05
鄢平
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In the current actual preparation process of activated carbon, due to the generally high temperature required by the physical activation method, the required activation time is also long, the energy consumption is large, and the yield of activated carbon is also low; while the chemical activation method The preparation of activated carbon is highly corrosive to equipment, the steps are cumbersome, and it is not easy to recycle, which leads to high production costs

Method used

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  • Method for preparing activated carbon through self-activation method
  • Method for preparing activated carbon through self-activation method
  • Method for preparing activated carbon through self-activation method

Examples

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Effect test

Embodiment 1

[0033] First, a certain amount of straw is selected, and the straw is fully crushed in a pulverizer to 60 meshes, and then the crushed straw is fully dried at an ambient temperature of 105° C. to obtain pretreated straw powder;

[0034] After the drying is completed, weigh 50 g of the above-mentioned pretreated straw powder that has been fully dried, and put it into a high-temperature furnace to prepare for activation treatment. In this embodiment, the temperature is raised to 950° C. temperature, the activated carbon intermediate product is obtained after activation for 3 hours;

[0035] The activated carbon intermediate product after the activation is cooled to below 100°C in a nitrogen atmosphere and then taken out to obtain a specific surface area of ​​1161m 2 / g of activated carbon products.

[0036] see figure 1 , figure 1 The nitrogen adsorption isotherm of activated carbon product in the method for the self-activation method that the first embodiment of the present ...

Embodiment 2

[0038] First, a certain amount of bagasse is selected, and the bagasse is fully pulverized in a pulverizer to 80 meshes, and then the pulverized bagasse is fully dried at an ambient temperature of 105° C. to obtain pretreated sugarcane powder;

[0039] After the drying is completed, weigh 50 g of the above-mentioned pretreated sugarcane powder that has been fully dried, and put it into a high-temperature furnace to prepare for activation treatment. In this embodiment, the temperature is raised to 900° C. temperature, the activated carbon intermediate product is obtained after activation for 4h;

[0040] The activated carbon intermediate product after activation is cooled to below 100°C in a nitrogen atmosphere and then taken out, with a specific surface area of ​​1259m 2 / g of activated carbon products.

[0041] see image 3 , image 3The nitrogen adsorption isotherm of activated carbon product in the method for the self-activation method that the second embodiment of the p...

Embodiment 3

[0043] First, a certain amount of peanut shells are selected, and the peanut shells are fully crushed in a crusher to 100 meshes, and then the crushed bagasse is fully dried at an ambient temperature of 105° C. to obtain pretreated peanut shell powder;

[0044] After the drying is completed, weigh 50 g of the above-mentioned pretreated sugarcane powder that has been fully dried, and put it into a high-temperature furnace to prepare for activation treatment. In this embodiment, the temperature is raised to 1000° C. After 2.5 hours of activation, the intermediate product of activated carbon is obtained;

[0045] The activated carbon intermediate product after activation is cooled to below 100°C in a nitrogen atmosphere and then taken out, with a specific surface area of ​​1172m 2 / g of activated carbon products.

[0046] see Figure 5 , Figure 5 The nitrogen adsorption isotherm of activated carbon product in the method for the self-activation method that the third embodiment...

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Abstract

The invention relates to a method for preparing activated carbon through a self-activation method. The method for preparing the activated carbon through the self-activation method includes the steps that bio-materials are smashed to obtain 60-300 mesh pre-treated raw materials; the pre-treated raw materials are subjected to temperature programming, the temperature is increased to the activation temperature of 800-1200 DEG C at a temperature increasing rate of 10-100 DEG C / min, and then the activating treatment is performed for 5-10 h, so that an intermediate product is obtained; and the intermediate product is subjected to cooling treatment till the temperature reaches the preset cooling temperature, then a cooled intermediate product is taken out, and an activated carbon product with the specific surface area being larger than 1100 m<2> / g is obtained. By means of the method for preparing the activated carbon through the self-activation method, a chemical reagent is not needed in the preparation process, aftertreatment is not needed either, the steps are simple, the preparation quality and production efficiency of the activated carbon are improved, the preparation cost of the activated carbon is reduced, and the application prospects are good.

Description

technical field [0001] The invention relates to the technical field of activated carbon preparation, in particular to a method for preparing activated carbon by a self-activation method. Background technique [0002] Activated carbon is an excellent adsorption material. Due to its excellent properties such as developed pore structure, large specific surface area, good electrical conductivity and chemical stability, it is widely used in national defense, chemical industry, petroleum, textile, food, medicine, transportation energy, etc. , agriculture, urban construction, atomic energy industry and other fields have a wide range of uses. [0003] Existing methods for preparing activated carbon are roughly divided into three categories: (1) physical activation method: physical activation method is usually divided into two steps of carbonization and activation. First, the precursor is carbonized and dehydrated at a certain temperature to form carbides. Into the oxidizing gas to ...

Claims

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Application Information

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IPC IPC(8): C01B32/312
CPCC01P2006/12C01P2006/17
Inventor 鄢平
Owner 鄢平
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