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Production method of oxidized wood active carbon for effectively adsorbing carbon dioxide

A technology for adsorbing carbon dioxide and wood activated carbon, applied in chemical instruments and methods, separation methods, inorganic chemistry, etc., can solve the problems of increasing the cost and energy consumption of the separation process, and it is difficult to achieve high CO adsorption and recovery.

Inactive Publication Date: 2017-03-22
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The maximum adsorption capacity of all coal-based activated carbon for carbon dioxide at a standard atmospheric pressure and room temperature is generally lower than 40cm 3 / g, it has been difficult to achieve CO as an adsorbent for adsorption decarbonization 2 High adsorption and recovery
Some enterprises have begun to use two-stage devices for adsorption decarbonization, which also increases the cost and energy consumption of the separation process

Method used

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  • Production method of oxidized wood active carbon for effectively adsorbing carbon dioxide
  • Production method of oxidized wood active carbon for effectively adsorbing carbon dioxide
  • Production method of oxidized wood active carbon for effectively adsorbing carbon dioxide

Examples

Experimental program
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Effect test

Embodiment 1

[0031] 1. Preparation of oxidized wood activated carbon

[0032] (1) Plant wood powder is used as the raw material of the carbon precursor, fully mixed with phosphoric acid and carbonized at 350°C, then the material is granulated in a molding machine, and then activated, rinsed and dried to obtain woody activated carbon;

[0033] (2) Stir 2.00g of wood activated carbon, 0.4g of sodium nitrate and 70g of concentrated sulfuric acid at 0°C for 15min;

[0034] (3) Slowly add 20g of potassium permanganate into the above mixture, and control the temperature below 20°C and stir for 1h;

[0035] (4) The above reaction was heated to 30°C, maintained at 30°C, and stirred for 0.5h;

[0036] (5) Add 300g of distilled water to the mixing system, raise the temperature to 90°C, and stir at this temperature for 10min;

[0037] (6) Continue to add 306.3g distilled water and 8.75g, 10% hydrogen peroxide solution to the mixing system, and stir for 10min;

[0038] (7) Wash and filter the mixed...

Embodiment 2

[0041] (1) Plant wood powder is used as the raw material of the carbon precursor, fully mixed with zinc chloride and carbonized at 400°C, then the material is granulated in a molding machine, and then activated, rinsed and dried to obtain woody activated carbon;

[0042] (2) Stir 2.00g of wood activated carbon, 0.6g of sodium nitrate and 76g of concentrated phosphoric acid at 2°C for 20min;

[0043] (3) Slowly add 10g of potassium permanganate into the above mixture, and control the temperature below 20°C and stir for 1.5h;

[0044] (4) The above reaction was heated to 33°C, maintained at 33°C, and stirred for 0.6h;

[0045](5) Add 160g of distilled water to the mixing system, raise the temperature to 94°C, and stir at this temperature for 13min;

[0046] (6) Continue to add 289g distilled water and 7.6g, 10% hydrogen peroxide solution to the mixing system, and stir for 15min;

[0047] (7) Wash and filter the mixed system obtained with 5% nitric acid solution, and then conti...

Embodiment 3

[0050] (1) Plant wood powder is used as the raw material of the carbon precursor, fully mixed with boric acid and carbonized at 450°C, then the material is granulated in a molding machine, and then activated, rinsed and dried to obtain woody activated carbon;

[0051] (2) Stir 2.00g of wood activated carbon, 0.8g of sodium nitrate and 80g of concentrated sulfuric acid at 3°C ​​for 24min;

[0052] (3) Slowly add 6.5g of potassium permanganate into the above mixture, and control the temperature below 20°C and stir for 1.8h;

[0053] (4) The above reaction was heated to 36°C, maintained at 36°C, and stirred for 0.7h;

[0054] (5) Add 117g of distilled water to the mixing system, raise the temperature to 96°C, and stir at this temperature for 16min;

[0055] (6) Continue to add 272g distilled water and 6.8g, 10% hydrogen peroxide solution to the mixing system, and stir for 14min;

[0056] (7) Wash and filter the mixed system obtained with 5% hydrogen chloride solution, and then ...

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Abstract

The invention relates to a production method of oxidized wood active carbon for effectively adsorbing carbon dioxide. The method comprises the following steps: oxidizing and modifying all-wood active carbon with acidic potassium permanganate, mixing the wood active carbon with sodium nitrate according to a mass ratio, adding the obtained mixture into an acid solution to prepare a mixed solution containing active carbon particles, adding a certain amount of potassium permanganate to the mixed solution, stirring and heating the potassium permanganate and the mixed solution to a certain temperature in order to fully oxidize the active carbon, removing unreacted acid and potassium permanganate by using a hydrogen peroxide solution and water, filtering the obtained material, and washing the filtered material to finally obtain the novel oxidized wood active carbon. The novel oxidized wood active carbon produced in the invention can effectively adsorb carbon dioxide at room temperature under a standard atmospheric pressure, and the adsorption quantity can reach 69.2 cm<3> / g, so the novel oxidized wood active carbon is obviously better than traditionally-used commercial coaly active carbon, and can be used as a novel function material for carbon dioxide adsorption.

Description

technical field [0001] The invention relates to a preparation method of oxidized wood activated carbon. Background technique [0002] Global warming has brought extensive impacts on the survival, development and stability of human society, and is one of the most severe and complex challenges facing mankind in the 21st century. According to the IEA report, about 60% of the greenhouse effect is produced by carbon dioxide gas, and carbon dioxide is one of the main greenhouse gases, and its emission reduction has become a worldwide problem. At the same time, carbon dioxide is also widely used in agriculture, light industry, machinery, chemical industry and other industries, so the research on carbon dioxide capture and utilization is also the focus of common attention of the scientific and industrial circles. [0003] At present, the methods of separation and capture of carbon dioxide mainly include solvent absorption method, cryogenic rectification method, membrane separation ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30B01D53/02C01B32/50
CPCB01D53/02B01D2257/504B01J20/20C01B2210/0017Y02C20/40Y02P20/151
Inventor 项生昌张章静李子银马秀玲
Owner FUJIAN NORMAL UNIV
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