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A kind of mnooh nanorod denitration catalyst and preparation method thereof

A denitrification catalyst and nanorod technology, applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve the problems of increased denitrification costs in power plants, short service life of catalysts, catalytic clogging and passivation, and achieve catalytic activity And the effect of enhanced selectivity, enhanced catalytic activity, and high safety

Inactive Publication Date: 2015-12-30
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It directly leads to severe catalytic blockage and passivation, the service life of the catalyst is shorter than that of foreign countries, and the denitrification cost of the power plant is significantly increased
At the same time due to V 2 o 5 It is a highly toxic substance, after use V 2 o 5 cause great damage to the environment

Method used

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  • A kind of mnooh nanorod denitration catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Take 1g of potassium permanganate and 20ml of N,N-dimethylformamide into an autoclave, and conduct a solvothermal reaction at a temperature of 100°C for 2h to obtain MnOOH nanorods. Take 1gCeO 2 Particles and 5ml of absolute ethanol were added to the reacted solution, and ultrasonically stirred for 3h to make the CeO 2 Fully loaded with MnOOH nanorods. Then, the reacted product was subjected to solid-liquid separation by centrifugation, and the separated solid was washed with distilled water and acetone in turn, and finally dried at 30°C for 1 hour to obtain the MnOOH nanorod denitration catalyst, MnOOH-CeO 2 Composite catalyst. The obtained final product was ground, and 0.2 g was taken for denitrification experiment.

[0026] Put 0.2g of the prepared catalyst into a quartz tube reactor for denitrification experiment. The flue gas reaction conditions are: the total gas flow rate is 1L / min, C O2= 4%, C CO2 =12%, N 2 =50ml, NH 3 =50ml, NH 3 / NO=1:1,N 2 As a bala...

Embodiment 2

[0028] Take 1g of potassium permanganate and 50ml of N,N-dimethylformamide into an autoclave, and conduct a solvothermal reaction at a temperature of 150°C for 2h to obtain MnOOH nanorods. Take 0.5gCeO 2 Particles and 2ml of absolute ethanol were added to the reacted solution, and ultrasonically stirred for 3.5h to make the CeO 2 Fully loaded with MnOOH nanorods. Then, the reacted product was subjected to solid-liquid separation by centrifugation, and the separated solid was washed with distilled water and acetone in sequence, and finally dried at 60°C for 2 hours to obtain the MnOOH nanorod denitration catalyst, MnOOH-CeO 2 Composite catalyst. The obtained final product was ground, and 0.2 g was taken for denitrification experiment.

[0029] Put 0.2g of the prepared catalyst into a quartz tube reactor for denitrification experiment. The flue gas reaction conditions are: the total gas flow rate is 1L / min, C O2= 4%, C CO2 =12%,N 2 =50ml, NH 3 =50ml, NH 3 / NO=1:1,N 2 A...

Embodiment 3

[0031] Take 1g of potassium permanganate and 75ml of N,N-dimethylformamide, put them into an autoclave, and conduct a solvothermal reaction at a temperature of 175°C for 4h to obtain MnOOH nanorods. Take 0.25gCeO 2 Particles and 1ml of absolute ethanol were added to the reacted solution, and ultrasonically stirred for 4h to make the CeO 2 Fully loaded with MnOOH nanorods. Then, the reacted product was subjected to solid-liquid separation by centrifugation, and the separated solid was washed with distilled water and acetone in turn, and finally dried at 80°C for 2.5 hours to obtain the MnOOH nanorod denitration catalyst, namely MnOOH-CeO 2 Composite catalyst. The obtained final product was ground, and 0.2 g was taken for denitrification experiment.

[0032]Put 0.2g of the prepared catalyst into a quartz tube reactor for denitrification experiment. The flue gas reaction conditions are: the total gas flow rate is 1L / min, C O2= 4%, C CO2 =12%,N 2 =50ml, NH 3 =50ml, NH 3 / ...

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Abstract

The invention discloses a MnOOH nanorod denitration catalyst and a preparation method thereof. The catalyst comprises MnOOH nanorods and CeO2 attached thereto. The preparation method is: carry out solvothermal reaction of potassium permanganate and N,N-dimethylformamide at 100-200°C for 2h-4h to obtain MnOOH nanorods; add absolute ethanol and nano-CeO2 particles to the reacted solution During the process, ultrasonically stir for 3h-5h, so that the nano-CeO2 particles are fully loaded on the MnOOH nanorods; then the impregnated product is subjected to solid-liquid separation, washed and dried to obtain the MnOOH-CeO2 composite catalyst. The preparation method has the advantages of simple process, convenient operation and convenient industrial production. The catalyst has no toxicity and high safety, and reduces the harm caused by the used catalyst to the environment.

Description

technical field [0001] The invention relates to the technical field of flue gas demercuration, and is used as a denitrification catalyst for coal-fired power plants, in particular to a MnOOH nanorod denitrification catalyst. Background technique [0002] Nitrogen oxide (NOx) emission control of coal-fired power plants is a key task in the field of energy conservation and environmental protection during the country's "Twelfth Five-Year Plan". Formulated the most stringent control standard in the world (100mg / m 3 ). With the promulgation of these national policies, how to effectively control NOx emissions has become one of the important issues to be solved in the field of power environmental protection. [0003] At present, about 90% of the flue gas denitrification units under construction or proposed to use SCR denitrification and mercury removal technology. Catalyst is the core of SCR technology, the existing commercial catalyst is generally V 2 o 5 -WO 3 / TiO 2 . ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/34B01D53/86B01D53/56
Inventor 孙健杨剑孟飞赵冬杨强孔明王铸
Owner CHONGQING UNIV
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