Method for preparing adsorbent by using semi-coke modification

A technology of adsorbent and semi-coke, which is applied in the field of modified semi-coke to prepare adsorbents, which can solve the problems of strong corrosion of equipment, large environmental pollution, and high concentration, and achieve the effects of simple preparation process, avoiding serious pollution, and high yield

Inactive Publication Date: 2015-04-22
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The chemical activation method generally uses a high concentration of activator acid

Method used

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  • Method for preparing adsorbent by using semi-coke modification
  • Method for preparing adsorbent by using semi-coke modification
  • Method for preparing adsorbent by using semi-coke modification

Examples

Experimental program
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Example Embodiment

[0021] Example 1

[0022] The blue charcoal is ground and sieved to obtain 100-120 mesh blue charcoal powder; according to the solid-liquid ratio of 1:5g / mL, the blue charcoal powder is added to the 2mol / L nitric acid aqueous solution, and the reaction is stirred at 70°C 24h, then filter to obtain the precipitate, dry the precipitate at 100°C for 3 hours, then place it in a muffle furnace, activate at 400°C for 20 minutes, take out the product after natural cooling to room temperature and grind it to about 200 meshes to obtain the adsorbent product.

[0023] The SEM picture of the raw material blue carbon used in this example is as figure 1 As shown, the SEM picture of the obtained adsorbent product is as figure 2 As shown, it can be seen from the figure that after the blue charcoal is activated according to the method of the present invention, the surface roughness of the blue charcoal is obviously increased, the surface pores are obviously increased, the internal pores are opene...

Example Embodiment

[0025] Example 2

[0026] The blue charcoal is ground and sieved to obtain 180-200 mesh blue charcoal powder; according to the solid-to-liquid ratio of 1:15g / mL, the blue charcoal powder is added to the 3mol / L nitric acid aqueous solution, and the reaction is stirred at 90℃ 24h, then filter to obtain the precipitate, dry the precipitate at 100°C for 6 hours and place it in a muffle furnace, activate it at 400°C for 20 minutes, take out the product after natural cooling to room temperature and grind it to about 200 meshes to obtain the adsorbent product.

[0027] The SEM picture of the raw material blue carbon used in this example is as figure 1 As shown, the SEM picture of the obtained adsorbent product is as image 3 As shown, it can be seen from the figure that after the blue charcoal is activated according to the method of the present invention, the surface roughness of the blue charcoal is obviously increased, the surface pores are obviously increased, the internal pores are op...

Example Embodiment

[0029] Example 3

[0030] The blue charcoal was ground and sieved to obtain 180-200 mesh blue charcoal powder; according to the solid-to-liquid ratio of 1:10g / mL, the blue charcoal powder was added to the 4mol / L nitric acid aqueous solution, and the reaction was stirred at 90℃ 24h, then filter to obtain the precipitate, dry the precipitate at 100°C for 6 hours and place it in a muffle furnace, activate it at 400°C for 20 minutes, take out the product after natural cooling to room temperature and grind it to about 200 meshes to obtain the adsorbent product.

[0031] The SEM picture of the raw material blue carbon used in this example is as figure 1 As shown, the SEM picture of the obtained adsorbent product is as Figure 4 As shown, it can be seen from the figure that after the blue charcoal is activated according to the method of the present invention, the surface roughness of the blue charcoal is obviously increased, the surface pores are obviously increased, the internal pores a...

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Abstract

The invention discloses a method for preparing an adsorbent by using semi-coke modification. The method is characterized by comprising the following steps: grinding and screening semi-coke, thereby obtaining 80-200-mesh semi-coke powder; adding the semi-coke powder into an aqueous solution of nitric acid, carrying out stirring reaction at the temperature of 50-95 DEG C for 6-24 hours, filtering, drying, adding the powder into a muffle furnace, activating at the temperature of 300-500 DEG C for 10-60 minutes, grinding the activated product to 180-200 meshes, thereby obtaining the target product adsorbent. The adsorbent prepared by the invention has excellent adsorptive property, particularly has an excellent adsorption effect on phenolic substances in wastewater and has equivalent adsorptive property to that of commercial grade activated carbon. Moreover, the used semi-coke refers to industrial waste semi-coke, the wastes are changed into valuable materials, the process is simple, and the product application is wide.

Description

technical field [0001] The invention relates to the field of modified functional materials, in particular to a method for preparing an adsorbent by modified blue carbon. Background technique [0002] Semi-coke is the product of low-rank coal low-temperature dry distillation and medium-temperature gasification. Products with smaller particle sizes can only be used as low-grade fuels because they cannot meet the process requirements required for the production of ferroalloys, ferrosilicon, silicon carbide, and calcium carbide. Or cheap treatment has caused waste, and a large amount of waste semi-coke accumulation has also polluted the environment. Because blue carbon has the characteristics of low ash, low sulfur, low phosphorus, high specific resistance, fixed carbon, chemical activity, etc., and has a certain adsorption capacity, but it is not as good as ordinary activated carbon. By modifying it by physical or chemical methods, its specific surface area and pore volume can...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/30C02F1/28
CPCB01J20/20C02F1/283C02F2101/345
Inventor 魏凤玉吴波张进成张婉婷章琛
Owner HEFEI UNIV OF TECH
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