Method for preparing active carbon by using coke reactivity testing device

A technology for preparing activated carbon and measuring devices, which is applied in the field of preparing activated carbon, can solve the problems of weak adsorption capacity and low specific surface area, and achieve the effects of simple steps, accelerated reaction rate, and precise control of heating rate and reaction temperature

Active Publication Date: 2015-06-10
SHANDONG IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the specific surface area is still very low and the adsorption capacity is weak

Method used

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  • Method for preparing active carbon by using coke reactivity testing device
  • Method for preparing active carbon by using coke reactivity testing device
  • Method for preparing active carbon by using coke reactivity testing device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A method for preparing activated carbon using a coke reactivity measuring device, which is carried out using a coke reactivity measuring device. The structure of the coke reactivity measuring device is as follows Figure 1-Figure 3 As shown, the coke reactivity measuring device includes a coke reactor 5 and a gas supply system. The coke reactor is a closed container. The bottom of the coke reactor is connected with an inlet pipe 3, and the top is connected with an exhaust pipe 4, inside the coke reactor The center is provided with a central thermocouple 1, and the outer jacket of the central thermocouple 1 is provided with a central thermocouple sleeve 2. The coke reactor is placed in a sealed heating electric furnace 19, the sealed heating electric furnace 19 includes a furnace shell 14 and a furnace 10, and the furnace 10 is connected to The heating tube is connected. The furnace 10 is a double-layer casing. A heating furnace wire 11 is wound from bottom to top in the g...

Embodiment 2

[0053] Same as the method for preparing activated carbon using the coke reactivity measuring device described in Example 1, except that:

[0054] (1) Add 10g powder coke to 80g potassium hydroxide, grind it to 0.075mm, and move it into the crucible;

[0055] (2) Then add 16g of coal tar into the crucible, add 2.6ml of water and stir evenly, move the crucible into the coke reactor of the coke reactivity measuring device, cover the reactor cover, and place the coke reactor in the coke reactivity measuring device In the sealed heating electric furnace of the coke reactor, a temperature measuring thermocouple is installed in the inner center of the coke reactor. The temperature measuring thermocouple is connected to the temperature and gas flow automatic controller through the circuit, and the inlet pipe and exhaust pipe of the reactor are respectively connected with Air supply system and exhaust system connection;

[0056] (3) Turn on the temperature controller, and heat the coke react...

experiment example

[0074] The specific surface area and reaction time of the activated carbons prepared in Examples 1 to 2 and the activated carbons of Comparative Examples 1 to 5 were measured according to the prior art. The results are shown in Table 1 below.

[0075] Table 1: Performance comparison of activated carbon

[0076]

[0077] According to the data comparison in Table 1, the specific surface area of ​​the activated carbon prepared by the treatment of Examples 1 to 2 is 1004.2m. 2 / g, the specific surface area of ​​Example 2 is 1004.5m 2 / g, the average pore size is The highest specific surface area of ​​the activated carbon of the comparative example can only reach 990.1m2 / g. By comparison, the activated carbon prepared by the coke reactivity measuring device prepared by the present invention has a large specific surface area up to 1005m2 / g, uniform pore size, and strong adsorption. In Comparative Example 1, the reaction was carried out in a resistance furnace. The airtightness and temper...

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Abstract

The invention relates to a method for preparing active carbon by using a coke reactivity testing device. The method comprises the following steps: adding coke powder into a potassium hydroxide solution by using the coke reactivity testing device, grinding until the grain size is 0.07-0.08mm, adding coal tar and water, and heating a crucible at a temperature raising rate of 8-12 DEG C/minute; when the temperature reaches 400-410 DEG C, introducing nitrogen, wherein the flow rate of nitrogen is 1.0-1.5L/min; when the temperature reaches 850-880 DEG C, insulating for 40-60 minutes; obtaining coarse active carbon; and crushing, washing and drying the coarse active carbon to obtain active carbon. The method for preparing active carbon provided by the invention is carried out in the coke reactivity testing device which is good in tightness. The coke reactivity testing device is capable of precisely controlling the temperature raising rate and the reaction temperature, preventing the active carbon from being oxidized in the preparation process, improving the specific surface area of the active carbon, strictly controlling the change of introducing nitrogen and preventing the coke powder from being oxidized, and moreover, the rate of an activating reaction is accelerated by virtue of the flow rate of nitrogen.

Description

Technical field [0001] The invention relates to a method for preparing activated carbon using a coke reactivity measuring device, and belongs to the technical field of activated carbon preparation methods. Background technique [0002] Activated carbon is a kind of carbon material with extremely developed micropore structure. Its specific surface area, micropore volume, pore size distribution and other microporous structure and performance chemical composition play a decisive role in the characteristics of activated carbon, and the different characteristics of activated carbon, Also affected by the restriction of the production raw materials and the preparation method, in order to make the activated carbon to be prepared have good performance suitable for the purpose, the raw materials are different, and the preparation methods are correspondingly different. The main raw materials for the preparation of activated carbon in industry are wood and coal. With the increasing shortage ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/12
Inventor 王航民李光美董丙成
Owner SHANDONG IRON & STEEL CO LTD
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