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Method for preparing active carbon from lotus seed hulls

A technology for preparing activated carbon and lotus seed shells, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve problems such as pollution, achieve the effects of reducing manufacturing costs, sufficient sources, and solving environmental pollution problems

Inactive Publication Date: 2012-06-13
JIANGXI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing activated carbon from lotus seed shells, to prepare a granular activated carbon material with uniform texture, developed voids, controllable pore size and large specific surface area, which not only helps to solve the problem of environmental pollution, but also Realized the recycling of lotus seed husks, which is a waste of crops, greatly reduced the manufacturing cost of activated carbon and improved production efficiency

Method used

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  • Method for preparing active carbon from lotus seed hulls
  • Method for preparing active carbon from lotus seed hulls
  • Method for preparing active carbon from lotus seed hulls

Examples

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Embodiment example 1

[0024] Use lotus seed shells that have been removed from sand and stones, dried, and crushed to a particle size of 5 mm as raw material, zinc chloride is used as an activator, and the mass ratio of lotus seed shells: activators is 1: (1.5-2.5) Mix, add 90 Stir and impregnate ~130mL water for 8~10h, moisten and puff, then dry. The rate is 3-5°C / min, heated to 650-750°C and activated for 30-60 minutes, cooled naturally, washed with 1-2mol / L hydrochloric acid and distilled water until the pH of the filtrate=6-7, and dried to obtain Uniform, strong, unbreakable granular lotus seed shell-based activated carbon. The test result characteristic curve is as follows figure 1 , 2 , 3, 4 shown.

Embodiment example 2

[0026] Use lotus seed shells that have been removed from sand and stones, dried, and crushed to a particle size of 5 mm as raw material, zinc chloride is used as an activator, and the mass ratio of lotus seed shells: activators is 1: (2.8~3.5) Mix, add 130 ~160mL water is stirred and impregnated for 10~12h, moistened and puffed, then dried. Under the protection of inert gas, the heating rate is 5~10°C / min. The rate is 4-6°C / min, heated to 750-850°C and activated for 60-90 minutes, cooled naturally, washed with 1-2mol / L hydrochloric acid and distilled water until the pH of the filtrate = 6-7, and dried to obtain Uniform, strong, unbreakable granular lotus seed shell-based activated carbon. The test result characteristic curve is as follows figure 1 , 5 , 6, and 7.

[0027] The characteristic parameters of lotus seed shell-based activated carbon prepared in different implementation cases are as follows

[0028]

[0029] a S BET , BET specific surface area; S mic , micr...

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Abstract

The invention discloses a method for preparing active carbon from lotus seed hulls, which relates to a method for preparing high-performance granular active carbon with a chemical activation method. The method comprises the following steps of: performing impurity removing, air drying, smashing, soaking, drying, carbonizing and activating on lotus seed hulls; and performing procedures such as recycling, acid cooking, rinsing, drying and the like to obtain finished granular active carbon. The active carbon has the advantages of uniform texture, firmness, developed air gap, controllable pore diameter, large specific surface area, and the like. The lotus seed hulls adopted in the method refer to crop waste which is not utilized effectively and has a sufficient source, so that environmentally-friendly granular active carbon is prepared by effectively utilizing the lotus seed hulls, the problem of environmental pollution caused by burning is solved, preparation cost of active carbon is reduced greatly, and industrial production is available.

Description

technical field [0001] The invention relates to a method for preparing activated carbon, in particular to a method for preparing activated carbon from lotus seed shells. Background technique [0002] Activated carbon is a carbonaceous adsorption material with developed pore structure and large specific surface area. It has unique physical and chemical properties, such as strong adsorption capacity, high mechanical strength, good chemical stability, and easy regeneration. Therefore, it is used as a high-quality Adsorbents and catalyst supports are widely used in the fields of industry, agriculture, national defense, transportation, medicine and health, environmental protection and energy. With the development of society and the improvement of people's living standards, especially the increasing requirements of environmental protection in recent years, the demand for activated carbon is increasing year by year. The adsorption performance of activated carbon is mainly determin...

Claims

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Application Information

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IPC IPC(8): C01B31/12C01B32/342
Inventor 温祖标李平侯豪情
Owner JIANGXI NORMAL UNIVERSITY
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