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Modified active carbon and method for removing ammonia gas in intensive livestock farm

A technology of activated carbon and modification, which is applied in the field of air purification to achieve the effect of large adsorption capacity and good effect

Inactive Publication Date: 2012-08-08
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, the modified 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 a specific concentration and temperature.

Method used

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  • Modified active carbon and method for removing ammonia gas in intensive livestock farm
  • Modified active carbon and method for removing ammonia gas in intensive livestock farm
  • Modified active carbon and method for removing ammonia gas in intensive livestock farm

Examples

Experimental program
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Effect test

Embodiment 1

[0059] Measure 20ml of activated carbon, the ratio of activated carbon to water in the high-temperature reactor is 2:3, first modify it in a high-temperature reactor at 300°C for 3 hours, dry it in an oven at 105°C for 3 hours, and then use a mass fraction of 40 % citric acid and copper nitrate solution were impregnated in equal volume at 20°C for 3 hours, the impregnated activated carbon was washed with distilled water until neutral, and then dried in an oven at 105°C for 3 hours, respectively: first GS300 and then 40% lemon acid and first GS300 and then 40% copper nitrate to make multi-step modified activated carbon. Two kinds of modified active carbons that above-mentioned make, at space velocity 900h -1 , Intake concentration 750-850mg / m 3 , respectively investigated their ability to remove ammonia at different temperatures of 30°C, 40°C, 60°C and 80°C, the adsorption curves were as follows figure 2 and image 3 .

Embodiment 2

[0061] According to two kinds of modified activated carbons prepared in Example 1, at a temperature of 30°C and an inlet concentration of 750-850mg / m 3 Next, the space velocity of 300h was investigated respectively -1 ,600h -1 ,900h -1 and 1200h -1 The ability to remove ammonia, the adsorption curves are as follows Figure 4 and Figure 5 .

Embodiment 3

[0063] According to two kinds of modified activated carbons that embodiment 1 makes, at temperature 30 ℃, space velocity 900h -1 Next, the imported concentration of 350-450mg / m3 was investigated respectively. 3 , 550-650mg / m 3 and 750-850mg / m 3 , 950-1050mg / m 3 The ability to remove ammonia, the adsorption curves are as follows Figure 6 and Figure 7 .

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Abstract

The invention relates to modified active carbon and a method for removing ammonia gas in an intensive livestock farm. In the method, columnar active carbon is taken as a carrier. The active carbon is modified by adopting a high-pressure hydrothermal chemical method and an isometric solution soaking modification method to enhance the removal of ammonia gas, the volume of selected active carbon is 20ml, the adsorption temperature is 30-80 DEG C, the air speed is 300-1,200 h<-1>, and the ammonia gas concentration is 350-1,050 mg / m<3>. The modified active carbon has high adsorption capability on ammonia gas, contributes to greatly increasing the volume of adsorbed ammonia gas, and can be applied to treatment of ammonia gas in the intensive livestock farm.

Description

technical field [0001] The invention belongs to the field of air purification, and in particular relates to a modified activated carbon and a method for removing ammonia in intensive farms. Background technique [0002] In recent years, with the further intensive and large-scale development of the livestock and poultry industry, it has brought huge economic benefits to people, but it will also be accompanied by the emission of some odorous gases, and the ensuing environmental problems cannot be ignored. It will also cause discomfort to people living in the surrounding area and seriously affect the quality of people's living environment. The research and treatment of this kind of malodorous gas has great practical significance. Ammonia is the main odor-causing substance of farm odor, and its treatment is imminent. The removal of ammonia by adsorption has attracted people's attention because of its economy and environmental protection. [0003] Activated carbon is a porous ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/08B01J20/20B01D53/04C01B32/30
Inventor 梁美生郝瑞刚康文凯陈文杰
Owner TAIYUAN UNIV OF TECH
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