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A continuous production method of copper algae mesoporous activated carbon

A technology of activated carbon and copper algae, applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve the problems of difficult to achieve continuous industrial production, equipment corrosive environment, unsystematic and other problems, achieve low equipment requirements, high product quality, simple craftsmanship

Active Publication Date: 2021-04-06
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current research on the preparation of activated carbon from copper algae is not systematic. The preparation method is mainly chemical method, and the obtained activated carbon is mainly microporous. The problems of equipment corrosion and environmental pollution in the preparation process are prominent, and it is difficult to realize continuous industrial production.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] (1) Pulverize copper algae to 10 meshes, carbonize after drying, and purge nitrogen before feeding, control the carbonization time to 20min, and the carbonization temperature to 400°C;

[0017] (2) With pure water vapor as activator, according to raw material: water vapor mass flow ratio is 1:0.1, copper algae after carbonization is added continuously in the rotary atmosphere furnace and activated, and the residence time of raw material in the rotary furnace is controlled at 10min, activation temperature 700°C;

[0018] (3) The product that step (2) obtains, after pickling, washing, drying, can obtain copper algae activated carbon;

[0019] (4) After testing, the total active pore volume is 1.1769mL / g, the average pore diameter is 6.0246nm, the mesoporosity is 65%, and the specific surface area is 895m 2 / g, methylene blue adsorption value 165mg / g, iodine adsorption value 820mg / g, activated carbon yield 45%.

Embodiment 2

[0021] (1) Pulverize the copper algae to 200 meshes, carbonize after drying, and purge nitrogen before feeding, control the carbonization time to 120min, and the carbonization temperature to 700°C during the carbonization process;

[0022] (2) with pure CO 2 As an activator, according to the raw material: the water vapor mass flow ratio is 1:10, the copper algae after carbonization is continuously added in a rotary atmosphere furnace for activation, the residence time of the raw material in the rotary furnace is controlled at 10min, and the activation temperature is 1000°C;

[0023] (3) The product that step (2) obtains, after pickling, washing, drying, can obtain copper algae activated carbon;

[0024] (4) After testing, the total active pore volume is 1.0444mL / g, the average pore diameter is 3.2946nm, the mesoporosity is 70%, and the specific surface area is 1270m 2 / g, methylene blue adsorption value 280mg / g, iodine adsorption value 1060mg / g, activated carbon yield 10%.

Embodiment 3

[0026] (1) Pulverize copper algae to 50 mesh, dry and carbonize, and nitrogen purge before feeding, control the carbonization time to 60min and the carbonization temperature to 450°C during the carbonization process;

[0027] (2) with pure CO 2 As an activator, according to the raw material: the water vapor mass flow ratio is 1:2, the copper algae after carbonization is continuously added in the rotary atmosphere furnace for activation, the residence time of the raw material in the rotary furnace is controlled at 30min, and the activation temperature is 950°C;

[0028] (3) The product that step (2) obtains, after pickling, washing, drying, can obtain copper algae activated carbon;

[0029] (4) After testing, the total active pore volume is 1.6604mL / g, the average pore diameter is 6.7855nm, the mesoporosity is 65%, and the specific surface area is 1020m 2 / g, methylene blue adsorption value 200mg / g, iodine adsorption value 1100mg / g, activated carbon productive rate 25%.

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Abstract

The invention discloses a continuous production method of copper algae mesoporous activated carbon. The method uses copper algae as a raw material and adopts a physical activation method to continuously produce activated carbon with well-developed mesopore structure. The activated carbon has the advantages of environmental friendliness and easy industrialization. The activated carbon produced has developed mesopores, narrow pore size distribution, and large specific surface area. It can be widely used in catalysts, supercapacitors, energy storage and other fields, and has a good prospect.

Description

technical field [0001] The invention relates to a continuous production method of copper algae mesoporous activated carbon, belonging to the technical field of activated carbon preparation. Background technique [0002] Activated carbon is a porous functional carbon material with developed pore structure. It has the characteristics of high specific surface area and strong adsorption capacity. It can be widely used in various fields such as chemical industry, environmental protection, food, and medicine. The pore size of activated carbon can be divided into micropores (<2nm), mesopores (2-50nm) and macropores (>50nm) according to the size. Commonly used activated carbon is mainly microporous, which has good adsorption performance for small molecular substances, but poor adsorption performance for polymers, inorganic macromolecules and other substances. In addition to conventional adsorption properties, mesoporous activated carbon can also adsorb larger molecules and gr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/318C01B32/336
Inventor 张智亮曹方方艾宁计建炳
Owner ZHEJIANG UNIV OF TECH
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