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Non-noble metal denitration catalyst as well as preparation method and application thereof

A denitrification catalyst and non-precious metal technology, applied in the field of catalysts, can solve the problems of vanadium-based catalysts, such as toxicity and environmental hazards, catalyst catalytic activity and selectivity reduction, etc., achieve good catalytic activity and stability, simple and convenient synthesis process, and low toxicity Effect

Inactive Publication Date: 2015-09-23
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although vanadium-based catalysts have been widely commercialized in power plants and diesel combustion engines, there are still some problems because SO 2 easily oxidized to SO 3 , which leads to a rapid decrease in the catalytic activity and selectivity of the catalyst when the temperature is higher than 550 ° C, and the toxicity of the vanadium-based catalyst is also harmful to the environment [2-4]

Method used

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  • Non-noble metal denitration catalyst as well as preparation method and application thereof
  • Non-noble metal denitration catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A preparation method of a non-precious metal denitration catalyst, specifically comprising the following steps:

[0041] (1) Add 6.4g of copper nitrate and 11g of manganese nitrate into 100g of deionized water to make a solution, then add 75g of Al 2 o 3 The carrier (i.e. alumina) was stirred at a constant speed at room temperature for 1 hour at a speed of 100 r / min, and then ultrasonically dispersed for 30 minutes (ultrasonic frequency was 40KHz) to obtain a dispersion;

[0042] (2) Use a rotary evaporator to evaporate the dispersion in step (1) at 80°C to dry up the solvent, then dry it at 100°C for 6 hours, and then heat it up in a muffle furnace at a rate of 2°C / min to Calcined at 450°C for 4 hours to obtain a composite carrier;

[0043](3) The composite carrier of step (2) is added into 100g deionized water, and ball milled for 5h (the ball milling speed is 400r / min) to obtain a ball mill; add 10g ethanol to the ball mill, and the ball mill is stirred for 5min (t...

Embodiment 2

[0045] A preparation method of a non-precious metal denitration catalyst, specifically comprising the following steps:

[0046] (1) Add 6.4g of copper nitrate, 11g of manganese nitrate, and 16.8g of cerium nitrate (analytical pure) into 100g of deionized water to make a solution, then add 90g of Al 2 o 3 The carrier (i.e. alumina) was stirred at room temperature for 1.5 hours at a constant speed at a speed of 200r / min, and then ultrasonically dispersed for 35min (ultrasonic frequency was 40KHz) to obtain a dispersion;

[0047] (2) Use a rotary evaporator to evaporate the dispersion in step (1) at 80°C to dry up the solvent, then dry it at 110°C for 5 hours, and then heat it up in a muffle furnace at a rate of 2°C / min to Calcined at 400°C for 5 hours to obtain a composite carrier;

[0048] (3) Add 120g deionized water to the composite carrier of step (2), and ball mill for 6h (the speed of ball milling is 400r / min) to obtain a ball mill; add 14g ethanol to the ball ink slurry...

Embodiment 3

[0050] A preparation method of a non-precious metal denitration catalyst, specifically comprising the following steps:

[0051] (1) Add 6.4g copper nitrate, 11g manganese nitrate, 16.8g cerium nitrate, 11.4g zirconium nitrate to 100g deionized water to form a solution, then add 100gAl 2 o 3 The carrier (i.e. aluminum oxide) was stirred at a constant speed at room temperature for 2 hours at a speed of 150r / min, and then ultrasonically dispersed for 40min (ultrasonic frequency was 40KHz) to obtain a dispersion;

[0052] (2) Use a rotary evaporator to evaporate the dispersion in step (1) at 80°C to dry up the solvent, dry at 90°C for 7 hours, and heat up to 500°C for 3 hours in an air atmosphere in a muffle furnace at a rate of 2°C / min. , to prepare a composite carrier;

[0053] (3) The composite carrier of step (2) is added into 150g deionized water, and ball milled for 5.5h (the ball milling speed is 400r / min) to obtain a ball mill; add 20g ethanol to the ball ink slurry, and...

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Abstract

The invention belongs to the technical field of catalysts and discloses a non-noble metal denitration catalyst as well as a preparation method and application thereof. The non-noble metal denitration catalyst is obtained through roasting of a matrix coated with an active paste, wherein the matrix is cordierite honeycomb ceramic; the active paste consists of a composite support and an adhesion substance; the composite support is prepared from a transitional metal salt and aluminium oxide, and the mass ratio of aluminium oxide to the transitional metal salt is (75-100):(17.4-45.6); the adhesion substance consists of a solvent, a binder and a plasticizer; the mass ratio of the binder to aluminium oxide is (0.005-0.01):(75-100). The prepared non-noble metal denitration catalyst has extremely favorable catalytic activity and stability at low temperature, is simple and convenient in synthesis process, causes little poison to the environment due to zero content of V2O5, and is mainly used in the flue gas denitration field.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and relates to a denitration catalyst, in particular to a non-precious metal denitration catalyst and its preparation method and application. Background technique [0002] With the development of my country's urbanization, the rapid increase of urban population and the rapid development of industry, the air pollution in my country's cities is very serious. The cities whose atmospheric environment meets the national first-level standard are less than 1% of the total, and 62% of them are Atmospheric nitrogen oxides (NO x ), the daily average concentration of sulfur dioxide exceeds the level 3 standard (100mg / m 3 ). According to the World Health Organization's monitoring of 60 countries for 10 to 15 years, my country has 8 of the 10 most polluted cities in the world, and NO x , SO 2 And the concentration of total suspended particulates is also the highest in the world. At present, the method o...

Claims

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Application Information

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IPC IPC(8): B01J23/889B01D53/86B01D53/56
Inventor 方利国周灵怡程江
Owner SOUTH CHINA UNIV OF TECH
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