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Manganese-cerium composition with flaky anatase type TiO2 as carrier and preparation and application

An anatase-type, composite technology, applied in the field of denitrification catalysts, can solve the problem of low catalytic efficiency of denitrification catalysts, and achieve superior denitrification activity and high catalytic activity

Inactive Publication Date: 2019-10-18
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention solves the technical problem that the catalytic efficiency of the denitrification catalyst is not high in the prior art

Method used

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  • Manganese-cerium composition with flaky anatase type TiO2 as carrier and preparation and application
  • Manganese-cerium composition with flaky anatase type TiO2 as carrier and preparation and application
  • Manganese-cerium composition with flaky anatase type TiO2 as carrier and preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A flaky anatase TiO 2 The preparation method of the manganese-cerium complex comprising the following steps:

[0038] (1) Preparation of flaky anatase-type titanium dioxide that preferentially exposes the {001} crystal face: 0.8ml of hydrofluoric acid with a mass ratio of 48% was added dropwise to 5ml of tetrabutyl titanate under stirring conditions, and the The mixed solution was transferred to a 20ml polytetrafluoroethylene-lined stainless steel autoclave, and then kept at 200°C for 24 hours in a blast drying oven, then taken out and cooled to room temperature naturally. The product was washed three times with deionized water and ethanol, and then calcined in a temperature-programmed muffle furnace at 450° C. for 3 hours to obtain 0.9 g of flaky anatase titanium dioxide.

[0039] figure 1 It is a TEM image of anatase titanium dioxide preferentially exposing the {001} crystal plane obtained in step (1) of Example 1 of the present invention. Depend on figure 1 It ca...

Embodiment 2

[0058] A flaky anatase TiO 2 The preparation method of the manganese-cerium complex comprising the following steps:

[0059] (1) Preparation of anatase-type titanium dioxide that preferentially exposes the {001} crystal face: 1.2ml of hydrofluoric acid with a mass ratio of 48% was added dropwise to 12ml of tetrabutyl titanate under stirring conditions, and the mixed solution Transfer to a 40ml polytetrafluoroethylene-lined stainless steel autoclave, then keep it in a blast drying oven at 180°C for 24 hours, take it out and cool it down to room temperature naturally. The product was washed three times with deionized water and ethanol, and then calcined in a temperature-programmed muffle furnace at 400° C. for 4 hours to obtain 1.3 g of flaky anatase titanium dioxide.

[0060] (2) The active component MnO on the {001} crystal surface of anatase titanium dioxide x , CeO x Loading: Prepare manganese cerium denitrification catalyst by impregnation method; weigh 1.303g cerium nit...

Embodiment 3

[0072] A flaky anatase TiO 2 The preparation method of the manganese-cerium complex comprising the following steps:

[0073] (1) Preparation of anatase-type titanium dioxide that preferentially exposes the {001} crystal face: 1.2ml of hydrofluoric acid with a mass ratio of 50% was added dropwise to 8ml of tetrabutyl titanate under stirring conditions, and the mixed solution Transfer to a 20ml polytetrafluoroethylene-lined stainless steel autoclave, then keep it in a blast drying oven at 160°C for 12 hours, take it out and cool it down to room temperature naturally. The product was washed three times with deionized water and ethanol, and then calcined in a temperature-programmed muffle furnace at 500° C. for 4 hours to obtain 1.5 g of flaky anatase titanium dioxide.

[0074] (2) The active component MnO on the {001} crystal surface of anatase titanium dioxide x , CeO x Loading: Prepare manganese cerium denitrification catalyst by impregnation method; weigh 2.371g cerium nitr...

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Abstract

The invention discloses a manganese-cerium composition with flaky anatase type TiO2 as a carrier and preparation and application and relates to the field of denitration catalyst. The composition is carried on the surface of anatase type TiO2; the anatase type TiO2 has a flaky morphology; and the composition is a composition of manganese oxide and cerium oxide. The preparation comprises the following steps: firstly, preparing the flaky anatase type TiO2 of which a crystal surface is firstly exposed {001} by using a hydrothermal method, and further preparing the composition that the manganese oxide and the cerium oxide are supported on the surface by using a dipping method. The manganese-cerium catalyst with the flaky morphology, which is disclosed by the invention, has high denitration activity at 80-240 DEG C when being compared with a manganese-cerium catalyst of which the crystal surface is firstly exposed {101} with a carrier of a cambiform morphology. The manganese-cerium composition crystal surface catalyst with the flaky anatase type TiO2 as the carrier, which is disclosed by the invention, is high in efficiency, low in cost and simple and easy in preparation method operation, and has instructive functions on research on low-temperature denitration catalysts.

Description

technical field [0001] The invention relates to the field of denitration catalysts, more specifically, to a flake anatase-type TiO 2 Manganese-cerium complex as carrier and its preparation and application. Background technique [0002] Nitrogen oxides (NO x ) is an important cause of environmental problems such as acid rain, photochemical pollution, and smog effects, among which coal-fired power plants are NO x One of the important sources of emissions. Selective catalytic reduction (SCR) denitrification is currently the most mainstream flue gas denitrification technology in the world, and the catalyst is the core of SCR technology. At present, vanadium-titanium catalysts are commonly used commercial catalysts, but there are still some problems to be solved. For example, the temperature window is high, so the flue gas environment of the denitrification device is poor, and the wear and poisoning of the catalyst are serious. It is ideal to install the denitrification devic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/34B01D53/86B01D53/56
CPCB01D53/8628B01D2258/0283B01J23/002B01J23/34B01J2523/00B01J2523/3712B01J2523/47B01J2523/72Y02C20/30
Inventor 张成李权李鑫李伟许豪仲柳余圣辉李胜男谭鹏方庆艳陈刚
Owner HUAZHONG UNIV OF SCI & TECH
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