Preparation method of supported type denitration catalyst

A denitration catalyst, a supported technology, applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve the problems of high preparation energy consumption, poor low temperature activity, narrow denitration activity temperature window, etc., to reduce poisoning. effect, reducing the preparation cost, and widening the denitration temperature window

Active Publication Date: 2012-09-12
SHANDONG UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to provide a preparation method of a supported denitration catalyst, which is used to solve the shortcomings of the existing metal oxide catalyst system, such as narrow denitration activity temperature window, poor low temperature activity and high energy consumption for preparation.

Method used

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  • Preparation method of supported type denitration catalyst
  • Preparation method of supported type denitration catalyst

Examples

Experimental program
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Embodiment 1

[0021] Dissolve ferric nitrate and cerium nitrate in water to obtain a mixed solution, stir the solution uniformly with magnetic force, add a certain amount of titanium dioxide carrier to the solution, and control Fe: Ce: TiO 2 The molar ratio of the solution is 19:1:100. Firstly, the magnetic stirring is continued for 1 hour at room temperature for impregnation, and then an excessive amount of ammonia water is slowly added dropwise to the mixed solution for deposition until the pH value of the mixed solution is 9-10, and the deposition is complete and After filtering and washing, the filter cake was placed in a microwave test bench and microwaved at a power of 210W for 10 minutes. After the microwave treatment, the sample was dried in a drying box at 105°C, and finally passed through a muffle furnace and 400°C in air. The catalyst was prepared by calcination and activation for 5h. Grind and sieve the prepared catalyst, take 40-60 mesh for later use, and become catalyst A.

Embodiment 2

[0023] The procedure is the same as in Example 1, other conditions remain unchanged, and the molar ratio of Fe / Ce is changed to 15:5 to prepare catalyst B.

Embodiment 3

[0025] The procedure was the same as in Example 1, other conditions remained unchanged, and the molar ratio of Fe / Ce was changed to 12.5:7.5 to prepare catalyst C.

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Abstract

The invention relates to a preparation method of a supported type denitration catalyst. The preparation method comprises the following steps of: adopting soluble iron salt and cerate as active components, adding water for dissolving and mixing to prepare mixed solution; adding corresponding carriers into the mixed solution, dipping, dripping an alkaline precipitating agent till the pH is equal to 9-10, precipitating completely, then filtering, and cleaning to obtain a filter cake; putting the filter cake into a microwave experiment table for microwave treatment, then drying, finally calcining, and activating to prepare the catalyst. The catalyst prepared by the invention has the advantages that a denitration temperature window is wide, the low-temperature denitration activity is good, the energy consumption of the preparation method is low, and the preparation of the denitration catalyst is reduced.

Description

technical field [0001] The invention relates to a method for preparing a denitration catalyst, in particular to a loaded iron-cerium composite oxide catalyst used for selective catalytic reduction and removal of nitrogen oxides from fixed sources such as coal-fired thermal power plants, and is applied to environmental protection and catalytic technology field. Background technique [0002] The flue gas emitted by coal-fired stationary sources such as thermal power plants contains a large amount of nitrogen oxides, sulfur oxides, and carbon dioxide, among which nitrogen oxides (NO x , mainly NO and NO 2 ) will cause major environmental problems such as acid rain, photochemical smog, ozone depletion and greenhouse effect, and cause great harm to the ecological environment and human health. According to the National Energy Forecast and NO x Forecast of emission factors, if effective measures are not taken, my country's NO x Emissions will reach 25.74 million tons, about twi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83B01D53/90B01D53/56
Inventor 韩奎华熊志波路春美郭东旭张信莉
Owner SHANDONG UNIV
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