Environment-friendly active carbon catalyst as well as preparation method and application thereof to flue gas mercury removal

The technology of activated carbon and catalyst is applied in the application field of environment-friendly activated carbon catalyst and its preparation, and mercury removal from flue gas, and achieves the effects of facilitating pressure drop, reducing use cost and facilitating operation.

Inactive Publication Date: 2015-01-21
南京正森环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide an environmentally friendly activated carbon catalyst with high mercury efficiency and low cost to solve the problem of mercury emission control in the flue gas of coal-fired power plants

Method used

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  • Environment-friendly active carbon catalyst as well as preparation method and application thereof to flue gas mercury removal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] In this example, the corn stalk was crushed and sieved to obtain corn stalk particles with a particle size of less than 20 meshes. 2 In the atmosphere, the crucible containing corn stalk particles was placed in a high temperature furnace at a furnace temperature of 600° C. for 10 minutes to obtain black corn stalk coke, which was taken out and placed in a desiccator to cool. The cooled corn stalk is milled and sieved to obtain a powder with a particle size of less than 60 meshes, which is the precursor of corn stalk coke.

[0041] In terms of weight %, mix the following components: 66% cornstalk coke, 14% sulfur powder, 17% (in SiO 2 (By weight) silica sol, 3% sesbania powder, the mixture is mixed with a 3wt% dilute nitric acid aqueous solution dropwise, then extruded into 2mm strips, and dried at 110°C for 12 hours.

[0042] With Fe element weight accounting for 5% of the total weight of the catalyst, an aqueous ferric nitrate solution was prepared as an immersion solution, ...

Embodiment 2

[0045] In this example, the corn stalk was crushed and sieved to obtain corn stalk particles with a particle size of less than 20 meshes. 2 In the atmosphere, the crucible containing corn stalk particles was placed in a high temperature furnace at a furnace temperature of 600° C. for 10 minutes to obtain black corn stalk coke, which was taken out and placed in a desiccator to cool. The cooled corn stalk is milled and sieved to obtain a powder with a particle size of less than 60 meshes, which is the precursor of corn stalk coke.

[0046] In terms of weight %, mix the following components: 60% cornstalk coke, 12% selenium dioxide, 25% cordierite powder, 3% sesbania powder, where the mixture is added dropwise with a 3wt% dilute nitric acid solution and kneaded evenly , Then extruded into 2mm strips, dried at 110°C for 12 hours.

[0047] The manganese nitrate solution was prepared as an impregnating liquid based on the weight of Mn element accounting for 5% of the total weight of the ...

Embodiment 3

[0050] In this example, the rice stalk was crushed and sieved to obtain rice stalk particles with a particle size of less than 20 meshes. 2 In an atmosphere, the crucible containing rice stalk particles was placed in a high-temperature furnace at 700°C for 10 minutes to obtain black rice stalk coke, which was taken out and placed in a desiccator to cool. The cooled rice stalk coke is milled and sieved to obtain a powder with a particle size of less than 60 meshes, which is the precursor of the rice stalk coke.

[0051] In terms of weight %, mix the following components: 70% rice stalk coke, 9% sulfur powder, 18% cordierite powder, 3% sesame powder, where the mixture is mixed with a 3wt% dilute nitric acid aqueous solution dropwise and kneaded evenly. It was then extruded into 2mm strips and dried at 110°C for 12 hours.

[0052] The ferric nitrate solution was prepared as the immersion liquid based on the weight of Fe element accounting for 5% of the total weight of the catalyst, an...

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Abstract

The invention discloses a preparation method of an environment-friendly active carbon catalyst. The preparation method comprises the following steps: (1) mixing an active carbon precursor, a simple substance or a compound containing at least one VIA family element, and an inorganic adhesive, performing extrusion forming after kneading, and drying to obtain a formed material; (2) preparing steeping fluid of a compound containing at least one of a IA family element, a IIA family element, a IB family element, a IIB family element, a VIIB family element, a VIII family element and a La family element, steeping the formed material obtained in step (1), and drying; and (3) activating the formed material treated in step (2) in a CO2 or H2O atmosphere to obtain the environment-friendly active carbon catalyst.

Description

Technical field [0001] The invention belongs to the technical field of activated carbon, and relates to an environmentally friendly activated carbon catalyst and a preparation method thereof and its application in flue gas mercury removal. Background technique [0002] As of the end of 2010, my country's thermal power installed capacity accounted for about 73.5% of the total power generation capacity, at 710GW, of which the installed capacity of coal-fired units was 657GW. In addition to coal combustion, a large amount of gaseous pollutants such as SO 2 , NO x And CO 2 , It also produces various forms of mercury. Mercury is a global pollutant listed by the United Nations Planning Program and the largest source of man-made pollution. The average mass fraction of mercury in coal in my country is 0.22 mg / kg. In 2005, the total amount of mercury released from burning coal accounted for 42.85 of the world’s total. %. The "Fume Emission Standard for Thermal Power Plants" (GB13223-2011...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/02B01J27/057B01J27/055B01D53/86B01D53/64
Inventor 荀波邹琥王鹏
Owner 南京正森环保科技有限公司
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