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Method for preparing mesopore type active carbon from amygdalus pedunculata shells

A long-handled almond shell and activated carbon technology, applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve the problems of high compactness and limitations, and achieve the effects of low production cost, large industrialization potential, and easy industrial production.

Inactive Publication Date: 2017-12-08
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Different from the current industrial production of activated carbon from fruit shells, coconut shells, apricot cores, walnut shells, etc. are used as raw materials. Due to the high density of the above raw materials, the prepared activated carbon products are mainly microporous. In the application of liquid phase drug macromolecule adsorption limited

Method used

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  • Method for preparing mesopore type active carbon from amygdalus pedunculata shells
  • Method for preparing mesopore type active carbon from amygdalus pedunculata shells
  • Method for preparing mesopore type active carbon from amygdalus pedunculata shells

Examples

Experimental program
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Effect test

Embodiment 1

[0022] 1. Weigh 50g of pretreated almond shells, raise the temperature to 600°C at a rate of 10°C / min under a nitrogen flow rate of 60mL / min, keep it warm for 1h, and then cool it down to room temperature naturally. The yield is 32%.

[0023] 2. Weigh 10g of long handle almond shell charring material, raise the temperature to 800°C at a rate of 10°C / min under the condition of nitrogen flow rate of 60mL / min, according to the ratio of charring material to water vapor mass ratio of 1:6 It was activated by steam for 30 minutes, and then cooled to room temperature in a nitrogen atmosphere. The yield was 38%.

[0024] 3. After the activated product was washed with water, pickled, washed with water, dried and pulverized, its iodine adsorption value was determined to be 1000mg / g, methylene blue adsorption value was 255mg / g, and the specific surface area was 1100m 2 / g, the mesoporosity is 68%.

Embodiment 2

[0026] In this embodiment, the activation temperature is raised to 850°C, and the rest are the same as in Example 1. The yield of activated carbon obtained is 36%, the iodine adsorption value is 1227mg / g, the methylene blue adsorption value is 300mg / g, and the specific surface area is 1356m 2 / g, mesoporosity is 72%.

Embodiment 3

[0028] In this embodiment, the activation temperature is raised to 900°C, and the rest are the same as in Example 1. The yield of activated carbon obtained is 30%, the adsorption value of iodine is 1289mg / g, the adsorption value of methylene blue is 345mg / g, and the specific surface area is 1374m 2 / g, mesoporosity is 80%.

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Abstract

The invention provides a method for preparing mesopore type active carbon from amygdalus pedunculata shells. A raw material, namely the amygdalus pedunculata shells, is subjected to high-temperature carbonization and steam activation to prepare an active carbon product with a high mesopore rate. Seed shells of a pioneer tree species amygdalus pedunculata for desert control are used as the raw material for preparing an adsorption material for environmental protection, and high-valued comprehensive utilization of special desert plant resources is realized; steam is used as an activating agent, and a technological process is clean and has no pollution; a prepared mesopore type fruit shell active carbon product has excellent adsorption performance on macromolecular drugs; the active carbon, which is prepared under the conditions that the carbonization temperature is 400 DEG C to 700 DEG C, the activation temperature is 800 DEG C to 1000 DEG C and the mass ratio of a carbonization material to the steam ranges from (1 to 2) to (1 to 7), has the mesopore rate of 82 percent or more and the adsorption capability on cephalexin of 260mg / g or more, so that the mesopore type active carbon has very high industrial production value.

Description

technical field [0001] The invention relates to a method for preparing mesoporous activated carbon from almond shells, in particular to a method for preparing mesoporous activated carbon from almond shells by high-temperature carbonization and steam activation. Background technique [0002] Activated carbon has been widely used in daily production and life because of its well-developed pore structure and huge specific surface area. According to the pore size, it can be divided into microporous and medium-to-large pore activated carbon. According to different activators, it can be roughly divided into physical carbon, chemical Carbon and physico-chemical carbon. Physical carbon mainly refers to activated carbon prepared with water vapor or carbon dioxide as an activator, chemical carbon mainly refers to activated carbon prepared with zinc chloride, phosphoric acid, potassium hydroxide, potassium carbonate, etc. as an activator, and physical-chemical carbon refers to It is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/336C01B32/324
Inventor 孙康申烨华李少妮蒋剑春王傲李聪
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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