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Sr2FeTaO6/alumina composite catalyst for denitrification of flue gas and preparation method thereof

A composite catalyst and alumina technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, chemical instrument and method, etc., can solve the problem of poor thermal conductivity of honeycomb cordierite and catalyst high temperature resistance Poor performance, short residence time and other problems, to achieve the effect of easy control of the preparation process, high catalytic activity and high conversion rate

Active Publication Date: 2018-03-23
JIANGSU KEHANG ENVIRONMENT ENG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalyst with the above structure has the problems of short gas residence time on the catalyst surface and poor thermal conductivity of honeycomb cordierite, and the catalyst has disadvantages such as poor high temperature resistance, easy poisoning, and secondary pollution to the environment.

Method used

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  • Sr2FeTaO6/alumina composite catalyst for denitrification of flue gas and preparation method thereof
  • Sr2FeTaO6/alumina composite catalyst for denitrification of flue gas and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1Sr 2 FeTaO 6 Preparation of / alumina composite denitration catalyst material and evaluation of catalytic denitration

[0031] (1) Dissolve 10g of strontium carbonate in excess hydrochloric acid, fully stir until the precipitation disappears completely, then add excess sodium hydroxide, after fully stirring, centrifuge the solid matter and fully wash with distilled water to obtain pure strontium hydroxide, bake Dry;

[0032] (2) 4.95g strontium hydroxide prepared by weighing 3.62g tantalum pentoxide and step (1) joins 41ml concentration and is after fully stirring in the sodium hydroxide solution of 4mol / L, adds the nanometer iron powder of 0.92g ( 300 mesh), transferred to the autoclave;

[0033] (3) Transfer the high-pressure reaction kettle in step (2) to a muffle furnace for hydrothermal reaction, raise the temperature to 400°C at a rate of 2°C / min, keep it warm for 48 hours, and cool it naturally; wash it fully with distilled water and then dry it. Get ...

Embodiment 2

[0040] The preparation method of embodiment 2 is the same as that of embodiment 1, except that hydrochloric acid is replaced by nitric acid.

[0041] The activity test method is the same as in Example 1; the conversion rate of NO is above 83%.

Embodiment 3

[0043] The preparation method of embodiment 3 is the same as that of embodiment 1, except that hydrochloric acid is replaced by sulfuric acid.

[0044] The activity testing method is the same as in Example 1; the conversion rate of NO is above 84%.

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Abstract

The invention discloses an Sr2FeTaO6 / alumina composite catalyst for denitrification of flue gas and a preparation method thereof. The catalyst is mainly prepared by preparing strontium carbonate, tantalum pentoxide and iron particles, serving as raw materials, into Sr2FeTaO6 powder, then coating the Sr2FeTaO6 powder on surface of a carrier alumina pellet. The Sr2FeTaO6 / alumina composite catalyst for the denitrification of the flue gas prepared by the invention is an environment-friendly iron-containing SCR catalyst with a novel material and structure, and has the advantages of wide reaction window temperature, high catalytic activity and no pollution; the catalyst can be denitrified at a low temperature, and NOx conversion rate of NO and the like is high. At the same time, the preparationmethod of the Sr2FeTaO6 / alumina composite catalyst for the denitrification of the flue gas has the advantages of simple process, low cost, wide raw materials, easy control of a preparation process, high yield and the like.

Description

technical field [0001] The invention belongs to the technical field of low-temperature denitrification catalysts, in particular to a Sr 2 FeTaO 6 Alumina / alumina composite catalyst and preparation method thereof. Background technique [0002] Nitrogen oxides (NOx) include a variety of compounds, but the main components are NO and NO 2 . The NOx emitted by human activities is mainly produced by fuel combustion and chemical industry production, such as fixed sources of fuel combustion such as thermal power plants, chemical plants, and steel mills, and mobile sources such as motor vehicles. In addition, a small amount of NOx is also produced in industrial production process and residential life. NOx not only has a strong poisonous effect on the human body, animals and plants, but also is the main cause of acid rain, smog and photochemical smog, and also participates in the destruction of the ozone layer. The control and treatment of nitrogen oxide pollution has always been...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/847B01D53/86B01D53/56
CPCB01D53/8628B01D2258/0283B01J23/002B01J23/8476B01J2523/00B01J2523/24B01J2523/31B01J2523/57B01J2523/842
Inventor 侯贵华刘怀平崔恩田宋正华张峰姜瑞雨张勤芳
Owner JIANGSU KEHANG ENVIRONMENT ENG TECH
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