A kind of preparation method of magnesium nitrogen co-doped high specific surface area biomass activated carbon

A high specific surface area, co-doping technology, used in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve the problem of high cost, and achieve the effect of improving adsorption capacity, low cost, and large specific surface area

Active Publication Date: 2021-10-08
GUIZHOU INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Traditional activated carbon mainly uses high-quality coal as raw material, and the cost is relatively high

Method used

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  • A kind of preparation method of magnesium nitrogen co-doped high specific surface area biomass activated carbon

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Embodiment 1

[0028] Method for preparing magnesium nitrogen-doped high-specific surface area biomass activated carbon: specifically: maxipase (scanning electron microscopy figure 1 After cleaning with distilled water, dried at 100 ° C, and cut into a small segment of about 3 cm; impregnated with a hemp chloride fragment in a water mixing solution of zinc chloride and magnesium chloride, a concentration of mixed aqueous solution was 50%, mixed aqueous solution Zinc and magnesium chloride mass ratio is 4: 1, zinc chloride and the impregnated marija core mass ratio is 4: 1. After the vacuum drying tank was subjected to 2.4 h after 24 h, then dried at 80 ° C for 24 h. The dried marijuana core was placed in a tube furnace, and under a nitrogen atmosphere, the rate was raised to 600 ° C at a rate of 5 ° C / min, and 2 h was held at 600 ° C, followed by cooling to room temperature under a nitrogen atmosphere. The resulting carbonide was soaked with a dilute hydrochloric acid solution (concentration o...

Embodiment 2

[0030] Method for preparing a high-proportional high-proportional surface area of ​​magnesium nitrogen-doped surface: specifically, the hemp core is cleaned with distilled water, dried at 100 ° C and cut into a small segment of 3 cm. The hemp cells were impregnated in a mixed solution of zinc chloride and magnesium chloride. The concentration of the mixed solution was 50%, zinc chloride and magnesium chloride in the mixed solution of 4: 1, zinc chloride and the impregnated marija core mass ratio of 2: 1. After the vacuum drying tank was subjected to 2.4 h after 24 h, then dried at 80 ° C for 24 h. The dried marijuana core was placed in a tube furnace, and under a nitrogen atmosphere, he was warmed to 800 ° C at a rate of 5 ° C / min, and 2 h was held at 800 ° C, followed by cooling to room temperature under a nitrogen atmosphere. The resulting carbonide was soaked with a dilute hydrochloric acid solution (concentration of 1 mol / L), and the vacuum decompression is washed with dis...

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Abstract

The invention discloses a preparation method and application of a high specific surface area biomass activated carbon material co-doped with magnesium and nitrogen. The activated carbon has a unique three-dimensional composite pore structure of macropores-mesopores-micropores, which is characterized by co-doping of magnesium and nitrogen. The method uses biomass waste hemp core as raw material. After cleaning, drying and shearing pretreatment, the raw material is soaked in a mixed solution of zinc chloride and magnesium chloride for a period of time, dried and put into a tube furnace. Carbonization activation and cooling under the atmosphere. After the resultant is acid-washed and washed with water, it is immersed in an ethanol solution of aminopyridine for a period of time and then dried to obtain the activated carbon co-doped with magnesium and nitrogen. The activated carbon has a high specific surface area and exhibits excellent carbon dioxide gas adsorption performance.

Description

Technical field [0001] The present invention relates to a method of preparing activated carbon with a biomass waste as a raw material, particularly a method of preparing magnesium-doped-doped-doped-doped-doped-doped-doped-doped-doped-doped-doped-doped-doped high-proportional-to-raw material. Background technique [0002] Activated carbon has a large specific surface area, strong adsorption, has been widely used in various fields such as chemical, environmental protection, food processing, metallurgy, drug refining and military chemistry. Traditional activated carbon is mainly based on high quality coal, the cost is higher. In order to reduce costs, saving energy, protecting the ecological environment, and develops activated carbon with renewable resources as raw materials. [0003] Cannabis has a low cost, high yield, low nutrient demand, high land utilization and other characteristics, is an environmentally friendly crop. Cannabis is the main source of paper, textile and rope. I...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/324C01B32/342
CPCC01B32/324C01B32/342
Inventor 刘珊秦庆东周登凤伍玉娇
Owner GUIZHOU INST OF TECH
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