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Preparation method of copper-foam-based hierarchical composite oxide monolithic denitrification catalyst

A technology of denitrification catalyst and composite oxide, which is applied in the field of preparation of foamed copper-based composite oxide monolithic denitration catalyst with hierarchical structure, can solve the problems of cumbersome preparation steps, easy falling off of active components, high processing cost, etc., so as to facilitate mass transfer , Avoid secondary pollution, simple preparation process

Active Publication Date: 2014-03-05
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalysts mentioned above all have problems such as cumbersome preparation steps, high processing costs, and easy falling off of active components.

Method used

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  • Preparation method of copper-foam-based hierarchical composite oxide monolithic denitrification catalyst

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] First cut the foamed copper into a circle, treat it in acetone to remove the surface oil, then ultrasonically wash it in dilute hydrochloric acid to remove the surface oxide, wash it with deionized water, dry it, and put it into a quartz tube , under a flowing air atmosphere, calcined at 400°C for 6h to produce copper foam coated with CuO nanowires; put the above copper foam into ferrous nitrate solution with a concentration of 0.002mol / L, and the copper foam was The dosage in the salt solution is 13g / L, transferred to the autoclave, heated at 180°C for 1h, and deposited Fe(OH) on the surface of CuO nanowires in situ 2 Particles; after natural cooling, the product was washed with deionized water until neutral, dried, and calcined at 500° C. for 3 hours to obtain the denitration catalyst.

[0020] Catalyst evaluation: put the prepared copper foam into a fixed-bed tubular reactor with an inner diameter of 20mm, and program the temperature to the required reaction temperat...

Embodiment 2

[0022] First cut the foamed copper into a circle, treat it in acetone to remove the surface oil, then ultrasonically wash it in dilute hydrochloric acid to remove the surface oxide, wash it with deionized water, dry it, and put it into a quartz tube , under a flowing air atmosphere, calcined at 500°C for 5 hours to obtain foamed copper coated with CuO nanowires; put the above-mentioned foamed copper into a ferrous sulfate solution with a concentration of 0.005mol / L, and the foamed copper was The dosage in the salt solution is 25g / L, transferred to the autoclave, heated at 170°C for 1 hour, and deposited Fe(OH) on the surface of CuO nanowires in situ 2 Particles; after natural cooling, the product is washed with deionized water to neutrality, dried, and calcined at 500° C. for 1 hour to obtain the denitration catalyst.

[0023] Catalyst evaluation: put the prepared copper foam into a fixed-bed tubular reactor with an inner diameter of 20mm, and program the temperature to the re...

Embodiment 3

[0025] First cut the foamed copper into a circle, treat it in acetone to remove the surface oil, then ultrasonically wash it in dilute hydrochloric acid to remove the surface oxide, wash it with deionized water, dry it, and put it into a quartz tube , in a flowing air atmosphere, calcined at 600°C for 4h to obtain copper foam coated with CuO nanowires; The dosage in the salt solution is 40g / L, transferred to the autoclave, heated at 160°C for 2 hours, and deposited Fe(OH) in situ on the surface of CuO nanowires 2Particles; after natural cooling, the product was washed with deionized water until neutral, dried, and calcined at 600° C. for 2 hours to obtain the denitration catalyst.

[0026] Catalyst evaluation: put the prepared copper foam into a fixed-bed tubular reactor with an inner diameter of 20mm, and program the temperature to the required reaction temperature to test the catalytic activity. The simulated flue gas is composed of N 2 , O 2 , NO and NH 3 Composition, o...

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Abstract

The invention relates to a preparation method of a copper-foam-based hierarchical composite oxide monolithic denitrification catalyst, and belongs to the field of environment-friendly nano catalyst materials. The catalyst includes main active components of CuO and Fe2O3. The hierarchical composite oxide monolithic denitrification catalyst is prepared by the steps of promoting in-situ growth on the surface of copper foam which is taken as a support carrier through oxidization to form a CuO nano line; under a hydrothermal condition, promoting in-situ deposition on the CuO nano line through hydrolysis of ferrous ions, and washing, drying and calcining to obtain the monolithic denitrification catalyst. The catalyst disclosed by the invention has the advantages of being simple in preparation method, free from molding, uniform in active component distribution, rapid in thermal response speed, good in denitrification performance and the like. The synthesized catalyst is applicable to treatment of nitrogen oxides in tail gas discharged from coal-fired power plants, garbage incinerators, steel mills and the like.

Description

Technical field [0001] The present invention involves a preparation method for a foam copper -based grading structure composite oxide overall denitration catalyst, which is an environmentally friendly catalytic nanomaterial field. Background technique [0002] Fonel gas such as coal -fired power plants, steel plants, etc. contain a large amount of nitrogen oxides (NO x ), Including NO, N 2 O, and NO 2 Waiting, it is one of the main air pollutants, which will cause environmental problems such as acid rain, greenhouse effect, ozone layer damage, and will cause great harm to the ecological environment of the earth and human health.Therefore, how to reduce NO x The emissions are the focus of research in the field of air pollution control. [0003] Currently, NO x The method of emissions is mainly to prevent nitrogen oxides and remove nitrogen oxides.The common methods of preventing nitrogen oxides are used to improve boiler and use low nitrogen oxide combustion technology, and how ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745B01J37/10B01J37/12
Inventor 张登松施利毅方程黄垒李红蕊张剑平
Owner SHANGHAI UNIV
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