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Method for preparation of activated carbon through rice hull desilication

A technology for preparing activated carbon and rice husk, applied in the field of activated carbon, can solve the problems of high ash content, difficulty in producing high-quality activated carbon, etc., and achieve the effect of good adsorption performance

Inactive Publication Date: 2012-11-21
太仓市联林活性炭厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Rice husk is an agricultural by-product with a certain carbon content. my country has abundant resources, but its ash content is too high, and it is difficult to produce high-quality activated carbon without ash reduction treatment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Dry 100g of rice husks and crush them until the particle size is <5mm, mix them with 300g of zinc chloride solution with a concentration of 40wt%, soak them in a crucible with a cover at room temperature for 16 hours, raise the temperature to 450°C in a muffle furnace, activate for 90 minutes, and cool. Wash with water until neutral, dry, crush and sieve to 200 mesh.

Embodiment 2

[0015] Dry 100g of rice husks and crush them until the particle size is less than 5mm, mix them with 200g of zinc chloride solution with a concentration of 50wt%, soak them in a crucible with a cover at room temperature for 16 hours, raise the temperature to 550°C in a muffle furnace, activate for 70 minutes, and cool. Wash with water until neutral, dry, crush and sieve to 200 mesh.

Embodiment 3

[0017] Dried 100g of rice husks and crushed to particle size <5mm, mixed with 100g of zinc chloride solution with a concentration of 60wt%, soaked in a covered crucible for 16 hours at room temperature, raised the temperature to 650°C in a muffle furnace, activated for 45 minutes, cooled, Wash with water until neutral, dry, crush and sieve to 200 mesh.

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PUM

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Abstract

The invention discloses a method for preparation of activated carbon through rice hull desilication. The method consists of: drying rice hulls, crushing them to a particle size of less than 5mm, mixing the particles with a zinc chloride solution with a concentration of 40-60wt% according to an impregnation ratio of 1:1.0-1:3.0, then putting the mixture in a covered crucible to soak at room temperature for 16h, raising the temperature to 450-650DEG C in a muffle furnace, carrying out activation for 45-90min, conducting cooling, performing washing to neutral, then carrying out drying, crushing and sieving till 200 meshes. The rice hull activated carbon prepared by the method has excellent adsorption performance.

Description

technical field [0001] The invention belongs to the technical field of activated carbon and relates to the preparation of activated carbon, in particular to a method for preparing activated carbon by desiliconization of rice husk. Background technique [0002] Activated carbon is a kind of porous carbon material, which has the characteristics of highly developed pore structure and huge specific surface area, strong adsorption capacity, good chemical stability, high mechanical strength, and easy regeneration after use failure. As an excellent adsorbent and catalyst carrier, it is widely used in the purification of liquid and gas, solvent recovery and as a catalyst carrier, etc. With the increasing attention to environmental protection issues. [0003] Rice husk is an agricultural by-product with a certain carbon content. my country has abundant resources, but its ash content is too high, and it is difficult to produce high-quality activated carbon without ash reduction treatm...

Claims

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Application Information

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IPC IPC(8): C01B31/12C01B32/324C01B32/348
Inventor 薛剑平
Owner 太仓市联林活性炭厂