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Bagasse activated carbon and preparation method thereof

A technology of activated carbon and bagasse, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problems of restricting the use of bagasse activated carbon, poor adsorption stability, general adsorption performance, etc. Good social and economic benefits, strong decolorization effect

Inactive Publication Date: 2021-03-05
GUANGXI ZHUANG AUTONOMOUS REGION ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, bagasse activated carbon has problems such as poor adsorption stability, low strength, and general adsorption performance during use, which restricts the use of bagasse activated carbon.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The invention provides a kind of bagasse activated carbon and preparation method thereof, specifically comprises the following steps:

[0023] a. Pretreatment: fully crush the bagasse, sieve it to 2-5mm, wash it with deionized water for 4-5 times, and dry it in a drying oven at 90-105°C to obtain dry bagasse for later use;

[0024] b. Carbonization: Under the protection of nitrogen, put the dried bagasse in a quartz boat, then transfer it to a closed tube furnace, heat until the charcoal particles are incandescent or no longer generate gas, stop heating, and cool to room temperature. Send it into a grinder for grinding and pass through a 30-40 mesh sieve to obtain bagasse carbon particles;

[0025] c. Activation: Activate the obtained bagasse charcoal particles with water vapor at 800°C for about 12 hours, then at 850°C with a mixture of 13% carbon dioxide and 87% water vapor for about 12 hours;

[0026] d. Pickling: Clean the activated bagasse with an equal volume of ...

Embodiment 2

[0030] The invention provides a kind of bagasse activated carbon and preparation method thereof, specifically comprises the following steps:

[0031] a. Pretreatment: fully crush the bagasse, sieve it to 2-5mm, wash it with deionized water for 4-5 times, and dry it in a drying oven at 90-105°C to obtain dry bagasse for later use;

[0032] b. Carbonization: Under the protection of nitrogen, put the dried bagasse in a quartz boat, then transfer it to a closed tube furnace, heat until the charcoal particles are incandescent or no longer generate gas, stop heating, and cool to room temperature. Send it into a grinder for grinding and pass through a 30-40 mesh sieve to obtain bagasse carbon particles;

[0033] c. Activation: After the obtained bagasse carbon particles were activated with water vapor at 800°C for about 12h, the phosphoric acid fraction was 17%, the additive x content was 5%, the activation temperature was 500°C, and the activation time was 0.3h. The yield of the ac...

Embodiment 3

[0038] The invention provides a kind of bagasse activated carbon and preparation method thereof, specifically comprises the following steps:

[0039] a. Pretreatment: fully crush the bagasse, sieve it to 2-5mm, wash it with deionized water for 4-5 times, and dry it in a drying oven at 90-105°C to obtain dry bagasse for later use;

[0040] b. Carbonization: Under the protection of nitrogen, put the dried bagasse in a quartz boat, then transfer it to a closed tube furnace, heat until the charcoal particles are incandescent or no longer generate gas, stop heating, and cool to room temperature. Send it into a grinder for grinding and pass through a 30-40 mesh sieve to obtain bagasse carbon particles;

[0041] c. Activation: After the obtained bagasse carbon particles were activated with water vapor at 800°C for about 12h, the activation temperature was 850°C, the mass concentration of zinc chloride solution was 190g / L, and the activation time was 1h, the yield of the obtained baga...

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Abstract

The invention discloses bagasse activated carbon and a preparation method thereof. The preparation method comprises the following steps: pretreating, carbonizing, activating, pickling, drying and post-treating bagasse. According to the invention, activated carbon is prepared by adopting a secondary activation method; gas activation is firstly adopted, and then a reagent activation method is adopted, so the surface area of the activated carbon can be further increased; preparation process is simple, convenient and environmentally friendly; the prepared activated carbon has the advantages of being large in specific surface area, small in pore diameter and high in adsorption capacity; since the bagasse is used as a raw material to prepare the activated carbon, an effective approach is provided for recycling of the bagasse and the prevention of resource waste and environmental pollution; and the bagasse is a safe non-toxic renewable biomass material, so the active carbon prepared from thebagasse can be used for the processing of a part of food, the added value of the product is high, and good social and economic benefits can be generated; and the activated carbon is high in decolorization capacity, good in stability, high in strength, safe to use and free of toxicity.

Description

technical field [0001] The invention relates to the field of activated carbon materials, in particular to a bagasse activated carbon and a preparation method thereof. Background technique [0002] Bagasse is a renewable resource with cheap price, concentrated sources of raw materials, easy collection, rich fiber and large specific surface area, which is an ideal material for preparing activated carbon. Activated carbon prepared from bagasse has a very large specific surface area and can be applied to the adsorption of metal ions in wastewater treatment. At present, the bagasse produced by sugar factories is mainly used for boiler incineration and provided to paper mills for paper making, and its utilization value is low. Therefore, using bagasse to prepare activated carbon can economically and effectively use bagasse, increase its economic added value, protect the environment, and provide a new idea for the comprehensive utilization of sugarcane. Only one activation method...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/324C01B32/336C01B32/342C01B32/348
CPCC01B32/324C01B32/336C01B32/342C01B32/348
Inventor 李长宁农倩林丽谢金兰莫璋红
Owner GUANGXI ZHUANG AUTONOMOUS REGION ACAD OF AGRI SCI
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