Preparation method of catalytically active ceramic wool for flue gas denitrification

A technology of catalytic activity and ceramic wool, which is applied in the field of catalytic active ceramic wool for flue gas denitrification, can solve the problems of reducing convenience and achieve the effect of simple installation, good catalytic activity and improved activity

Active Publication Date: 2020-02-07
江苏省陶瓷研究所有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the honeycomb or porous ceramic is a rigid body, when the shape and size of the catalytic device change, it is necessary to remake the catalyst carrier with a suitable shape and size, which reduces the convenience of application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A method for preparing catalytically active ceramic wool for flue gas denitrification, the preparation process comprising the following steps:

[0022] (1) Prepare a mixed solution containing catalytically active components; wherein, based on the total weight of the mixture solution, zirconium nitrate is 39wt%, manganese nitrate is 28wt%, ferric nitrate is 12wt%, and cerium nitrate is 21wt%; Triton X -100 (octylphenyl polyoxyethylene ether) 0.3%wt%.

[0023] (2) Immerse the zirconia ceramic fiber cotton in the solution prepared in step (1); wherein, the immersion time is 3min, the solution temperature is 45°C; the fiber diameter of the zirconia ceramic fiber cotton is 3μm, and the bulk density is 95kg / m 3 .

[0024] (3) After removing excess solution from the fiber cotton impregnated with the solution in step (2), place the fiber cotton in a closed container filled with ammonia gas for fumigation; the time is 30 minutes.

[0025] (4) Microwave-dry the fiber cotton fum...

Embodiment 2

[0029] A method for preparing catalytically active ceramic wool for flue gas denitrification, the preparation process comprising the following steps:

[0030] (1) preparation contains the mixed solution of catalytically active component; Wherein, based on the total weight of the mixture solution, zirconium nitrate 42wt%, manganese nitrate is 26wt%, ferric nitrate is 8wt%, cerium nitrate is 24wt%; Triton X-100 (octylphenyl polyoxyethylene ether) 0.5%wt%.

[0031] (2) Immerse the zirconia ceramic fiber cotton in the solution prepared in step (1); wherein, the immersion time is 5min, and the solution temperature is 50°C; the fiber diameter of the zirconia ceramic fiber cotton is 5 μm, and the bulk density is 103 kg / m 3 .

[0032] (3) After the fiber cotton impregnated with the solution in step (2) is removed with a dryer to remove excess solution, place the fiber cotton in a closed container filled with ammonia gas for fumigation; the time is 45 minutes.

[0033] (4) Microwave-...

Embodiment 3

[0037] A method for preparing catalytically active ceramic wool for flue gas denitrification, the preparation process comprising the following steps:

[0038] (1) Prepare a mixed solution containing catalytically active components; wherein, based on the total weight of the mixture solution, zirconium nitrate is 36wt%, manganese nitrate is 24 wt%, ferric nitrate is 15wt%, and cerium nitrate is 25 wt%; Triton X -100 (octylphenyl polyoxyethylene ether) 0.6%wt%.

[0039] (2) Immerse zirconia ceramic fiber cotton in the solution prepared in step (1); wherein, the immersion time is 8 minutes, and the solution temperature is 55°C; the fiber diameter of zirconia ceramic fiber cotton is 5 μm, and the bulk density is 103 kg / m 3 .

[0040] (3) After removing excess solution from the fiber cotton impregnated in step (2) with a drier, place the fiber cotton in a closed container filled with ammonia gas for fumigation; the time is 50 minutes.

[0041] (4) Microwave-dry the fiber cotton fu...

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Abstract

A preparation method for catalytically active ceramic cotton for flue gas denitration is provided; a preparation process comprises the following steps successively: (1) preparing a mixed solution containing a catalytically active ingredient; (2) dipping zirconia ceramic cellucotton in the mixed solution prepared in the step (1); (3) removing excess solution of the cellucotton dipped in the solution in the step (2), and fumigating with ammonia gas; (4) carrying out drying treatment on the cellucotton fumigated in the step (3); and (5) calcining. The prepared catalyst product has the advantages of large specific surface area, high temperature resistance, corrosion resistance and wide use range.

Description

technical field [0001] The invention belongs to the field of chemical ceramics, in particular to catalytically active ceramic cotton for flue gas denitrification. Background technique [0002] Nitrogen oxides are one of the main pollutants in the atmosphere, which seriously endanger the ecological environment and human health. One of the commonly used technologies for denitrification is selective catalytic reduction of ammonia. The conventional method is to coat the catalyst on the surface of honeycomb or porous ceramic carrier , the carrier is placed in the container, and when the high-temperature flue gas passes through, the contained nitrogen oxides react with ammonia to form nitrogen and water. Since the honeycomb or porous ceramic is a rigid body, when the shape and size of the catalytic device change, it is necessary to remake the catalyst carrier with a suitable shape and size, which reduces the convenience of application. In the invention, the catalyst is coated on ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/889B01D53/56B01D53/88
CPCB01D53/8628B01D53/88B01D2258/0283B01J23/002B01J23/8892B01J35/06B01J2523/00B01J2523/72B01J2523/842B01J2523/3712B01J2523/48
Inventor 陆丽芳朱军王越超易佑宁
Owner 江苏省陶瓷研究所有限公司
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