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Medium and low temperature coal-fired flue gas denitration catalyst and preparation method thereof

A nano-catalyst and ferric nitrate technology, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve problems affecting applications, poor surface acidity, etc., and achieve low pollution, excellent catalytic performance, and environmental protection. friendly effect

Inactive Publication Date: 2018-03-06
NANJING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

while Fe 2 o 3 As a common transition metal oxide, its surface acidity is relatively poor, which greatly affects its performance in NH 3 -Application in SCR reaction

Method used

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  • Medium and low temperature coal-fired flue gas denitration catalyst and preparation method thereof
  • Medium and low temperature coal-fired flue gas denitration catalyst and preparation method thereof
  • Medium and low temperature coal-fired flue gas denitration catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1.Fe 9 Ti 1 o xPreparation of -400 Composite Oxide Nanocatalyst

[0023] Accurately weigh 14.54g ferric nitrate and 0.96g titanium sulfate and dissolve in 100mL H 2 Fully stir in O, and then use ammonia water as a precipitating agent, slowly drop into the mixed solution of the iron-titanium precursor under the condition of stirring, and control the final pH of the solution to be 10. After suction filtration and washing, dry in an oven at 110°C for 12 hours, grind evenly, and then roast at 400°C for 4 hours in an air atmosphere in a muffle furnace to obtain Fe 9 Ti 1 o x -400 Catalyst. its NH 3 -SCR activity results, XRD, H 2 -TPR and NH 3 -TPD see attached Figure 1-4 .

Embodiment 2

[0024] Example 2.Fe 9 Ti 1 o x Preparation of -600 Composite Oxide Nanocatalyst

[0025] Accurately weigh 14.54g ferric nitrate and 0.96g titanium sulfate and dissolve in 100mL H 2 Fully stir in O, and then use ammonia water as a precipitating agent, slowly drop into the mixed solution of the iron-titanium precursor under the condition of stirring, and control the final pH of the solution to be 10. After suction filtration and washing, dry in an oven at 110°C for 12 hours, grind evenly, and then roast at 600°C for 4 hours in an air atmosphere in a muffle furnace to obtain Fe 9 Ti 1 o x -600 catalyst. its NH 3 -SCR activity results and XRD characterization results are attached Figure 1-2 .

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Abstract

The invention relates to a medium and low temperature coal-fired flue gas denitration catalyst and a preparation method thereof. The medium and low temperature coal-fired flue gas denitration catalystis prepared by uniformly mixing a certain quantity of ferric nitrate and aqueous solution of titanous sulfate, using ammonium hydroxide as a precipitant, controlling PH of final solution to 10 so asto ensure complete precipitation, and after carrying out extraction filtration and washing on an obtained precipitation product for multiple times, carrying out drying and calcination by a drying oven. The adopted preparation method has the advantages that the prepared catalyst is large in specific surface area, excellent in catalytic performance, and good in sulfur resistance and water resistance; the required raw materials are cheap, easy to obtain and rich in resource; a preparation process is simple and convenient, and has the advantages of no special requirements for equipment, low energyconsumption, low pollution and environmental friendliness; the medium and low temperature coal-fired flue gas denitration catalyst can be produced in a large scale and has potential industrial application prospect.

Description

Technical field: [0001] The invention relates to an iron-titanium composite oxide nano catalyst, a preparation method thereof and an application of the catalyst in flue gas denitrification of coal-fired power plants. Background technique: [0002] With the rapid development of my country's economy and society, the problem of environmental pollution has attracted more and more attention. Among them, as one of the important culprits of severe weather such as smog and haze, about NO x The issue of pollution control is also increasingly on the agenda. Atmospheric NO x The main sources of pollution can be summarized as mobile pollution sources represented by motor vehicle exhaust emissions and stationary pollution sources represented by flue gas emissions from coal-fired power plants. while NH 3 Selective Catalytic Reduction of NO x Technology (NH 3 -SCR) is the current industrial treatment of NO in stationary source coal-fired flue gas x An economical, efficient and widel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745B01J37/08B82Y30/00B82Y40/00B01D53/86B01D53/56
Inventor 董林孙敬方陆亦洋汤常金李奇隽邹伟欣葛成艳
Owner NANJING UNIV
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