A kind of ferromanganese composite oxide catalyst for simultaneous denitrification and mercury removal and preparation method thereof

A technology of composite oxides and catalysts, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem that there is no flue gas mercury emission control technology, and the treatment cost is expensive , trace element pollution and other issues, to achieve the effect of improving anti-poisoning performance, high activity and selectivity, and simple preparation process

Inactive Publication Date: 2011-12-28
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For a long time, different from coal-burning primary pollutant SO 2 and NO X However, the problem of trace element pollution caused by coal burning has not attracted enough attention
[0003] At home and abroad, the treatment of metal Hg in flue gas is still in its infancy, and there is no mature technology. Most of them are removed by activated carbon adsorption, and the treatment cost is quite expensive.
At present, there is no mature and commercially applicable flue gas mercury emission control technology for coal-fired power stations
In addition, the high economic cost of mercury emission control technologies for coal-fired flue gas will put enormous pressure on the commercial operation of coal-fired power stations

Method used

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  • A kind of ferromanganese composite oxide catalyst for simultaneous denitrification and mercury removal and preparation method thereof
  • A kind of ferromanganese composite oxide catalyst for simultaneous denitrification and mercury removal and preparation method thereof
  • A kind of ferromanganese composite oxide catalyst for simultaneous denitrification and mercury removal and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] 1) Dry the titanium dioxide carrier at 110° C. for 12 hours, and take 15 g;

[0042] 2) 3.58g 50% Mn(NO 3 ) 2 solution and 2.02g Fe(NO 3 ) 3 9H 2 O was dissolved in deionized water at 25°C to make the volume of the solution reach 19ml, and stirred at room temperature for 1 hour to make it evenly mixed to obtain a solution;

[0043] 3) Using the equal volume impregnation method, add the carrier obtained in step 1) to the solution obtained in step 2), stir rapidly to mix the solid and liquid evenly, use an ultrasonic cleaner to ultrasonically oscillate for 10 minutes, and then place it in a cool place for 12 hours ;

[0044] 4) The obtained mixture was dried in a constant temperature drying oven at 110° C. for 12 hours, and then calcined at 500° C. for 5 hours to obtain a catalytic oxidation catalyst with ferromanganese composite oxide as the active component and titanium dioxide as the carrier.

[0045] The prepared catalyst was pulverized and sieved to obtain cata...

Embodiment 2

[0047] 1) Dry the titanium dioxide carrier at 110° C. for 12 hours, and take 15 g;

[0048] 2) 7.16g 50% Mn(NO 3 ) 2 solution and 12.12g Fe(NO 3 ) 3 9H 2 O was dissolved in deionized water at 25°C to make the volume of the solution reach 19ml, and stirred at room temperature for 1 hour to make it evenly mixed to obtain a solution;

[0049] 3) Using the equal volume impregnation method, add the carrier obtained in step 1) to the solution obtained in step 2), stir rapidly to mix the solid and liquid evenly, use an ultrasonic cleaner to ultrasonically oscillate for 10 minutes, and then place it in a cool place for 12 hours ;

[0050] 4) The obtained mixture was dried in a constant temperature drying oven at 110° C. for 12 hours, and then calcined at 500° C. for 5 hours to obtain a catalytic oxidation catalyst with ferromanganese composite oxide as the active component and titanium dioxide as the carrier.

[0051] Using the activity evaluation device and method in Example 1,...

Embodiment 3

[0056] 1) Dry the titanium dioxide carrier at 110° C. for 12 hours, and take 15 g;

[0057] 2) 10.74g 50% Mn(NO 3 ) 2 solution and 16.16g Fe(NO 3 ) 3 9H 2 O was dissolved in deionized water at 25°C to make the volume of the solution reach 19ml, and stirred at room temperature for 1 hour to make it evenly mixed to obtain a solution;

[0058] 3) Using the equal volume impregnation method, add the carrier obtained in step 1) to the solution obtained in step 2), stir rapidly to mix the solid and liquid evenly, use an ultrasonic cleaner to ultrasonically oscillate for 10 minutes, and then place it in a cool place for 12 hours ;

[0059] 4) The obtained mixture was dried in a constant temperature drying oven at 110° C. for 12 hours, and then calcined at 500° C. for 5 hours to obtain a catalytic oxidation catalyst with ferromanganese composite oxide as the active component and titanium dioxide as the carrier.

[0060] Using the activity evaluation device and method in Example 1...

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Abstract

The invention discloses a ferromanganese composite oxide catalyst for simultaneous denitrification and mercury removal, the active components of which are MnO2 and Fe2O3, wherein the molar ratio of Mn / Fe is 0.5-5, the catalyst is compounded on the carrier TiO2, and its active components are The total mass fraction of the component is 5% to 40%, and CuO, CeO2, V2O5 and other oxide auxiliary components can also be added, and the addition amount is 0% to 10% of the total mass fraction. The invention also discloses a preparation method of the catalyst, which adopts an impregnation method or a co-precipitation method. The catalyst of the present invention has high activity and selectivity for the catalytic oxidation of nitrogen oxides and mercury, and its temperature adaptability window is wide, which can effectively improve the anti-poisoning performance of the catalyst, and has strong adaptability to harsh operating conditions, and can It is widely used in the catalytic oxidation of pollutants in the flue gas selective catalytic oxidation denitrification and demercuration process, and at the same time, the preparation method of the catalyst of the present invention is simple in process and low in cost.

Description

technical field [0001] The invention belongs to the field of air pollution control, and in particular relates to a ferromanganese composite oxide catalyst used for catalytic oxidation and simultaneous denitrification and mercury removal and a preparation method thereof. Background technique [0002] Due to the rapid economic growth and industrial expansion, the air pollution caused by coal burning is becoming more and more serious, and the impact on the environment and human body cannot be ignored. For a long time, different from coal-burning primary pollutant SO 2 and NO X However, the problem of trace element pollution caused by coal burning has not attracted enough attention. In recent years, with the seriousness of coal-burning pollution and the enhancement of environmental protection awareness, the problem of trace element pollution caused by coal-burning has begun to be taken seriously. Heavy metals such as mercury have permanent accumulation in organisms and food c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889B01D53/86B01D53/56B01D53/64
Inventor 高翔骆仲泱岑可法倪明江宋浩吴卫红徐甸张涌新赵健施正伦周劲松方梦祥余春江王树荣程乐鸣王勤辉
Owner ZHEJIANG UNIV
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