Preparation method of distiller's grains activated carbon with high specific surface area

A technology of activated carbon preparation and high specific surface area, which is applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problems of unsatisfactory performance of activated carbon and cumbersome preparation process, and achieve low cost, convenient operation and simple operation Effect

Inactive Publication Date: 2019-05-10
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation process of this method is loaded down with trivial details, needs to use a variety of chemical reagents, and the performance of the activated carbon obtained is not ideal, and the specific surface area is 450-750m 2 / g

Method used

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  • Preparation method of distiller's grains activated carbon with high specific surface area
  • Preparation method of distiller's grains activated carbon with high specific surface area

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Dry the distiller's grains first, grind and pulverize them, filter them through a 100-mesh sieve, place them in a carbonization furnace, and pass nitrogen gas for 10 minutes after sealing them well. Adjustment parameters: initial temperature 20°C, heating rate 5°C / min, heating temperature 350°C, heat preservation 1h. After cooling, the carbonized material is taken out.

[0023] (2) Prepare 25wt% KOH solution and carbonized material at a solid-to-liquid ratio of 4:1, stir on a stirrer for 10 minutes, and dry in an oven at 60°C for 12 hours.

[0024] (3) Put the carbonized material in step 2 in the heating furnace, first pass nitrogen gas for 10 minutes, then start heating, control the heating rate at 10°C / min, set the activation temperature at 650°C, keep it for 2 hours, and take it out after cooling.

[0025] (4) Configure 20wt% dilute hydrochloric acid and continuously add it dropwise into the activated material obtained in step 3), until the reaction is mild and ...

Embodiment 2

[0028] (1) Dry the distiller's grains first, grind and pulverize them, filter them through a 100-mesh sieve, place them in a carbonization furnace, and pass nitrogen gas for 10 minutes after sealing them well. Adjustment parameters: initial temperature 20°C, heating rate 5°C / min, heating temperature 450°C, heat preservation 1.5h. After cooling, the carbonized material is taken out.

[0029] (2) Prepare 25wt% KOH solution and carbonized material at a solid-to-liquid ratio of 4:1, stir on a stirrer for 10 minutes, and dry in an oven at 60°C for 12 hours.

[0030] (3) Put the carbonized material in step 2 in a tube furnace, first pass nitrogen gas for 10 minutes, then start heating, control the heating rate at 10°C / min, set the activation temperature at 750°C, keep it for 2 hours, and take it out after cooling.

[0031] (4) Configure 20wt% dilute hydrochloric acid and continuously drop it into the activated material obtained in step 3), and stop the dropping after the reaction i...

Embodiment 3

[0035] (1) Dry the distiller's grains first, grind and pulverize them, filter them through a 100-mesh sieve, and place them in a carbonization furnace. Introduce nitrogen gas for 10 minutes, adjust parameters: initial temperature 20°C, heating rate 5°C / min, heating temperature 500°C, hold for 2 hours. After cooling, the carbonized material is taken out.

[0036] (2) Prepare 25wt% KOH solution and carbonized material at a solid-to-liquid ratio of 4:1, stir on a stirrer for 10 minutes, and dry in an oven at 60°C for 12 hours.

[0037] (3) Put the carbonized material in step 2 in the heating furnace, first pass nitrogen gas for 10 minutes, then start heating, control the heating rate at 10°C / min, set the activation temperature at 850°C, keep it for 2 hours, and take it out after cooling.

[0038] (4) Configure 20wt% dilute hydrochloric acid and continuously add it dropwise into the activated material obtained in step 3), and stop the dropwise addition after the reaction is mild ...

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Abstract

The invention discloses a preparation method of distiller's grains activated carbon with high specific surface area. The method comprises preparation processes of carbonization, activation pretreatment, activation, aftertreatment and the like, wherein waste distiller's grains of a liquor factory are used as raw materials, and activated carbon with high specific surface area and high micropore rateis obtained by reasonably controlling carbonization and activation heating rate. Compared with another activated carbon production process in terms of modification of activated carbon, the preparation method has the advantages that high-performance activated carbon can be directly prepared by controlling the production process; the obtained activated carbon has large specific surface area, high micropore rate, strong adsorption capacity and the like, self-aggregation can occur after adsorption, and separation from a water body is facilitated.

Description

technical field [0001] The invention belongs to the field of activated carbon materials, in particular to a method for preparing activated carbon with a high specific surface area. Background technique [0002] my country is a big wine-making country, with an annual output of more than 10 million tons of liquor, resulting in a huge amount of distiller's grain waste. Currently, distiller's grains are mainly used for agricultural composting, biogas production, feed production, incineration and landfill, etc., and the use of raw materials is not sufficient. , low value-added products. Distiller's grains are rich in biomass, which is an ideal carbon source. Distiller's grains can be made into activated carbon carbon materials to broaden the high value-added application fields of its products. [0003] At present, the preparation process of activated carbon includes chemical reagent pretreatment, high temperature carbonization, activation treatment, high temperature activation, s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/324C01B32/348
Inventor 刘琳李林东姚菊明
Owner ZHEJIANG SCI-TECH UNIV
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