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A preparation method of surface-activated straw-based porous activated carbon

A surface activation, activated carbon technology, applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve the problems of low economic benefit, environmental pollution and human health impact, reduce production costs, solve the problem of straw pollution, enrich The effect of microscopic pore structure

Inactive Publication Date: 2021-01-05
ZHEJIANG FORESTRY ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

my country's crop straw is mainly feed (24%), returning to the field (15%), and living fuel (40%). Due to low economic benefits, a certain amount of manpower and material resources are required to process straw, and a large amount of straw is discarded and incinerated. , causing serious impact on environmental pollution and human health

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] The surface-activated straw-based porous activated carbon of this embodiment is prepared by the following steps:

[0018] (1) After the naturally air-dried straw is crushed, screen it with a 60-mesh sieve, dry it in a blast drying oven at 110°C to a constant weight, and set aside; add zinc chloride to deionized water to dissolve, and then slowly add concentrated hydrochloric acid dropwise , continue magnetic stirring for 20min to obtain zinc chloride solution;

[0019] (2) Add the stalks to the zinc chloride solution, stir to make the stalks completely submerged in the zinc chloride solution, and soak for 24 hours, filter, and dry to constant weight in a blast drying oven at 110°C to obtain zinc chloride treatment after the straw;

[0020] (3) Mix the activated clay and the straw treated with zinc chloride at a mass ratio of 1:2.5. After mixing evenly, add potassium carbonate, continue mixing evenly, transfer to an oven, and dry for 24 hours; The final material is com...

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PUM

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Abstract

A method for preparing surface-activated straw-based porous activated carbon is characterized by comprising the following steps: pre-treating straw, and preparing a zinc chloride solution; soaking straw in the zinc chloride solution; by taking the straw treated by both of white earth and zinc chloride as a raw material and potassium carbonate as an activator, performing high-temperature pyrolysisto prepare activated carbon; and performing hydrogen gas heat treatment on the activated carbon to activate the surface so as to obtain the surface-activated straw-based porous activated carbon. According to the method for preparing the surface-activated straw-based porous activated carbon, surface functional groups and a microporous structure of the activated carbon are adjusted and controlled byhydrogen gas heat treatment, so that the surface-activated straw-based porous activated carbon has a well-developed porous structure and strong physical adsorption capability.

Description

technical field [0001] The invention relates to a carbon material, in particular to a method for preparing surface-activated straw-based porous activated carbon. Background technique [0002] As a large agricultural country, China's annual straw output has reached more than 800 million tons. According to data, my country's rice output in 2014 was 206.507 million tons. According to the calculation method of straw amount, it is close to 300 million tons of rice straw. In recent years, although the technology of straw processing has been continuously updated, and the comprehensive utilization rate has reached 70%, compared with developed countries, the industrial utilization rate is still low, and the economic benefits need to be improved. my country's crop straw is mainly feed (24%), returning to the field (15%), and living fuel (40%). Due to low economic benefits, a certain amount of manpower and material resources are required to process straw, and a large amount of straw is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/348C01B32/384C01B32/324C01B32/336C01B32/36
Inventor 蒋应梯庄晓伟潘炘于海霞王进刘亚群
Owner ZHEJIANG FORESTRY ACAD
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