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Method for preparing ammonia-removing activated carbon

An activated carbon and modified technology, which is applied in the field of air purification, can solve problems such as unsatisfactory, achieve high heating efficiency, improve adsorption capacity, and improve adsorption performance.

Inactive Publication Date: 2018-03-09
DONGGUAN YIMAO FILTER MEDIA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] However, the ammonia removal activated carbon prepared by the above method still cannot meet the current needs in the process of adsorbing ammonia, especially for the removal of ammonia at low concentrations in indoor air and at room temperature.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 200g activated carbon is soaked in 5% formic acid aqueous solution, the ratio of activated carbon to solution is 1:2, after 2h, the water of activated carbon is drained, placed in a microwave environment and reactivated for 30min, microwave power 100KW, temperature 110℃. Soak the reactivated activated carbon with a 10% cobalt chloride aqueous solution for 2 hours. The ratio of activated carbon to the solution is 1:2. The soaked activated carbon is dried in an oven at 105°C until the moisture content is less than 10%. Ammonia activated carbon. The ammonia removal activated carbon loaded in the air purifier for 1 hour can remove 95% of ammonia.

Embodiment 2

[0036] 200g activated carbon is immersed in 5% acetic acid aqueous solution. The ratio of activated carbon to solution is 1:2. After 2h, the water of activated carbon is drained, placed in a microwave environment and reactivated for 1h, microwave power 200KW, temperature 150℃. Soak the reactivated activated carbon with a 20% cobalt chloride aqueous solution for 2 hours. The ratio of activated carbon to solution is 1:2. The soaked activated carbon is dried in an oven at 105℃ until the moisture content is less than 10%. Ammonia activated carbon. The ammonia removal activated carbon loaded in the air purifier for 1 hour can remove 92% of ammonia.

Embodiment 3

[0038] 200g activated carbon is soaked in 10% formic acid aqueous solution, the ratio of activated carbon to solution is 1:2, the water of activated carbon is drained after 4h, placed in microwave environment and reactivated for 30min, microwave power 100KW, temperature 110℃. Soak the reactivated activated carbon with a 20% cobalt nitrate aqueous solution for 4 hours. The ratio of activated carbon to solution is 1:2. After soaking, the activated carbon is dried in an oven at 105°C until the moisture content is less than 10% to produce ammonia removal Activated carbon. The ammonia removal activated carbon loaded in the air purifier for 1 hour can remove 97% of ammonia.

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Abstract

The invention provides a method for preparing ammonia-removing activated carbon. The method comprises the steps that a, a raw material of activated carbon is subjected to microwave activation after being acidized; and b, a cobalt salt solution is added to achieve modification. According to the method, microwaves are utilized to heat and then the activated carbon is activated, microwave heating belongs to internal heating, the temperature can be increased rapidly, no temperature gradient exist in a microwave field, the activated carbon is heated evenly and the heating efficiency is high. The activated carbon is rapidly heated in the microwave environment, and the temperature of the activated carbon is increased rapidly, the properties of surface functional groups change, and then the activated carbon is reactivated.

Description

Technical field [0001] The invention belongs to the field of air purification, and specifically relates to a preparation method of activated carbon for removing ammonia. Background technique [0002] Ammonia in indoor air mainly comes from toilets and concrete additives used in construction. Additives contain a large amount of ammonia substances, which are reduced to ammonia and released in the wall with changes in environmental factors such as temperature and humidity. Common features of ammonia poisoning Acute poisoning: after inhaling a large amount of ammonia in a short period of time, tearing, sore throat, hoarseness, cough, phlegm may be bloodshot, chest tightness, difficulty breathing, and may be accompanied by dizziness, headache, nausea, vomiting, fatigue, etc. , There may be cyanosis, conjunctival and pharynx congestion and edema, rapid breathing, pulmonary rales, etc. Ammonia is the main pollutant in indoor air, and its treatment is imminent. The removal of ammonia b...

Claims

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Application Information

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IPC IPC(8): C01B32/354B01D53/02B01J20/20B01J20/34
CPCB01D53/02B01D2257/406B01J20/20B01J20/3441
Inventor 罗平
Owner DONGGUAN YIMAO FILTER MEDIA
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