Modified activated carbon as well as preparation method and application thereof

A technology of activated carbon and modification, which is applied in the field of modified activated carbon and its preparation, which can solve the problems of low plasticity of activated carbon and difficult to overcome, and achieve the effects of improving catalytic activity, increasing load, and enhancing bonding strength

Inactive Publication Date: 2016-12-07
上海净球环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the requirements of the preparation process, activated carbon, as a material with low plasticity, has always been a difficult problem to overcome when it is molded by an extruder.

Method used

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  • Modified activated carbon as well as preparation method and application thereof
  • Modified activated carbon as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] (1) Preparation of modified activated carbon

[0046] 1) Add coconut shell activated carbon to an aqueous solution of nitric acid with a content of 20% by weight and treat the activated carbon at 50°C for 6h, wash the treated activated carbon with deionized water and dry at 90°C for 8h for later use , wherein the mass volume ratio of the gac and the nitric acid aqueous solution is 1:8;

[0047] 2) Adding 10% manganese nitrate aqueous solution and Polyethylene Glycol 1000 to the activated carbon obtained in step 1), after soaking for 3 hours, enter the electric furnace protected by nitrogen for activation, the activation time is 5 hours, and the activation temperature is 400 ℃, to obtain pre-modified activated carbon, wherein the add-on of polyethylene glycol 1000 is 1% of the manganese nitrate aqueous solution weight;

[0048] 3) adding the pre-modified activated carbon obtained in step 2) into a 10% alkali solution by weight, soaking for 3 hours, and then entering int...

Embodiment 2

[0066] (1) Preparation of modified activated carbon

[0067] 1) Add coconut shell activated carbon to an aqueous solution of nitric acid with a content of 20% by weight and treat the activated carbon at 50°C for 6h, wash the treated activated carbon with deionized water and dry at 90°C for 8h for later use , wherein the mass volume ratio of the gac and the nitric acid aqueous solution is 1:8;

[0068] 2) Add manganese nitrate aqueous solution and Polyethylene Glycol 1000 that are 5% by weight to the activated carbon obtained in step 1), after soaking for 4 hours, enter into an electric furnace protected by nitrogen to activate, the activation time is 5 hours, and the activation temperature is 350 ℃, to obtain pre-modified activated carbon, wherein the add-on of polyethylene glycol 1000 is 0.5% of the manganese nitrate aqueous solution weight;

[0069] 3) adding the pre-modified activated carbon obtained in step 2) into an 8% alkali solution by weight, soaking for 3 hours, and...

Embodiment 3

[0087] (1) Preparation of modified activated carbon

[0088] 1) Add coconut shell activated carbon to an aqueous solution of nitric acid with a content of 20% by weight and treat the activated carbon at 50°C for 6h, wash the treated activated carbon with deionized water and dry at 90°C for 8h for later use , wherein the mass volume ratio of the gac and the nitric acid aqueous solution is 1:8;

[0089] 2) Adding the manganese nitrate aqueous solution and Polyethylene Glycol 1000 that the weight percent content is 15% to the gac obtained in step 1), after soaking for 6 hours, enter the electric furnace protected by nitrogen for activation, the activation time is 5 hours, and the activation temperature is 450 ℃, to obtain pre-modified activated carbon, wherein the add-on of Polyethylene Glycol 1000 is 4% of manganese nitrate aqueous solution weight;

[0090] 3) adding the pre-modified activated carbon obtained in step 2) into a 15% alkali solution by weight, soaking for 4 hours,...

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Abstract

The invention provides modified activated carbon as well as a preparation method and an application thereof. The modified activated carbon is prepared through the method comprising the following steps: 1) adding activated carbon into a nitric acid aqueous solution of a certain concentration, treating the activated carbon at a certain temperature, washing the treated activated carbon with deionized water, and drying the washed activated carbon for later use; 2) adding a manganese nitrate aqueous solution and a surface dispersant into the activated carbon obtained in step 1), and performing activation in a nitrogen-protected electric furnace to obtain pre-modified activated carbon, wherein the addition amount of the surface dispersant is 0.1-10% of the weight of the manganese nitrate aqueous solution; and 3) adding the pre-modified activated carbon obtained in step 2) into an alkali solution, and performing activation in the nitrogen-protected electric furnace to obtain the needed modified activated carbon. The modified activated carbon provided by the invention has a relatively large specific surface area, a relatively large void volume and a relatively large void number, and meanwhile, loads a catalytic active component, namely manganese, and improves the ultra-low temperature catalytic activity.

Description

technical field [0001] The invention relates to the field of polluted air purification, in particular to a modified activated carbon and its preparation method and application. Background technique [0002] Nitrogen oxides are the main pollution source of the atmosphere. It not only causes acid rain, photochemical smog and other problems that damage the earth's ecological environment, but also seriously endangers human health. Therefore, how to effectively remove nitrogen oxides has become an important topic of concern in the field of environmental protection. Ammonia Selective Catalytic Reduction (SCR) has become a mainstream denitrification technology for stationary sources such as thermal power plants due to its maturity and high efficiency, and its core problem lies in the development of catalysts. At present, scholars at home and abroad have carried out in-depth and systematic research on many catalyst systems, such as V 2 o 5 -WO 3 / TiO 2 ,MnO 2 / TiO 2 ,FeOx / TiO...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/08B01D53/86B01D53/56B01J21/18
CPCB01D53/8628B01J21/18
Inventor 施雅琼
Owner 上海净球环保科技有限公司
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