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Catalyst as well as preparation method and application thereof

A catalyst and concentration technology, applied in chemical instruments and methods, separation methods, dispersed particle separation, etc., can solve the problems of high investment and operating costs, large amount of adsorbent, difficult solution handling, etc., to reduce energy consumption and low cost , Realize the effect of resource recycling

Inactive Publication Date: 2013-05-01
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the technology's NO X The removal efficiency is low, the energy consumption is high, the solution after absorbing the exhaust gas is not easy to handle, and it is easy to cause secondary pollution
In addition, the cost of absorbents, oxidants, and reducing agents is high, and it is not suitable for low-concentration NO in flue gas X removal of
Adsorption method uses adsorbent to absorb NO in flue gas X , high removal rate, can realize NO X recycling, but the amount of adsorbent is large, the equipment is huge, and the investment and operation costs are high

Method used

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  • Catalyst as well as preparation method and application thereof
  • Catalyst as well as preparation method and application thereof
  • Catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1: The specific operation of the preparation method of the catalyst is as follows:

[0028] (1) The carrier activated carbon is crushed to 40-60 mesh, and then immersed in nitric acid with a concentration of 30% by mass, ethanol with a concentration of 30% by mass, and distilled water successively, and ultrasonically washed for 40 minutes at room temperature and 40 Hz, and then at 100 ℃ Dry at constant temperature for 3h;

[0029] (2) Mix manganese acetate with water to make a solution with a concentration of 0.01 mol / l ; Add 20% hydrofluoric acid solution to the solution Mixture , Where F - : Mn 2+ The molar ratio is 3; add concentrated ammonia to the mixed liquid In, make a mixture , Mixture pH is 10.1; keep Mn 2+ The mass ratio to activated carbon is 0.1, and the treated activated carbon is immersed in the mixed liquid Heating and stirring in medium, depositing at 50℃ for 2h, the number of depositions is 3; the precipitate is filtered, dried at 100℃ for 3h...

Embodiment 2

[0031] Example 2: The specific operation of the preparation method of the catalyst is as follows:

[0032] (1) The carrier activated carbon is crushed to 40-60 mesh, and then immersed in nitric acid with a concentration of 50% by mass, ethanol with a concentration of 10% by mass, and distilled water. Wash it ultrasonically for 20 minutes at room temperature and 40Hz, and then at 110℃ Dry under constant temperature for 2h;

[0033] (2) Mix manganese nitrate and water to make solution I with a concentration of 0.05 mol / l; add a hydrofluoric acid solution with a mass percentage concentration of 10% to solution I to make mixed solution II, where F - : Mn 2+ The molar ratio is 4; add concentrated ammonia water to the mixed solution II to prepare the mixed solution III, the pH of the mixed solution III is 8.4; keep Mn 2+ The mass ratio to activated carbon is 0.9. The treated activated carbon is immersed in mixed solution III, heated and stirred, and deposited at 60°C for 1 hour, and the ...

Embodiment 3

[0035] Example 3: The specific operation of the preparation method of the catalyst is as follows:

[0036] (1) Crush the carrier activated carbon to 40-60 meshes, immerse it in nitric acid with a concentration of 40% by mass, ethanol with a concentration of 20% by mass, and distilled water successively, and wash with 40Hz ultrasonic at room temperature for 30 minutes, and then at 120℃ Constant temperature drying for 1h;

[0037] (2) Mix manganese chloride with water to make a solution with a concentration of 0.03mol / l ; Add 40% hydrofluoric acid solution to the solution Mixture , Where F - : Mn 2+ The molar ratio is 5; add concentrated ammonia water to the mixed solution In, make a mixture , Mixture pH is 9.3; keep Mn 2+ The mass ratio to activated carbon is 0.5, and the treated activated carbon is immersed in the mixed liquid Heating and stirring in medium, depositing at 40℃ for 4h, the number of deposition is 2; the precipitate is filtered, dried at 120℃ for 1h, and calci...

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Abstract

The invention discloses a catalyst as well as a preparation method and an application thereof. The catalyst is prepared by taking active carbon (AC) as a carrier and magnesium (Mn) as an active component and adopting a liquid phase deposition method. The prepared catalyst is high in oxidative activity; when nitrogen oxide in smoke is removed by using the catalyst, the removal efficiency under the condition of low oxygen and low temperature is high; the oxidizability of NOX in the smoke after the oxidization operation is 45-65%; and a denitrated byproduct can be recovered for reutilization.

Description

technical field [0001] The invention relates to a catalyst and its preparation method and application, belonging to the field of catalysts. Background technique [0002] With the rapid economic development and the use of a large amount of fossil fuels, nitrogen oxides (NO X ) pollution caused by photochemical smog, acid rain and other environmental problems have become increasingly prominent, and the environmental situation has become increasingly severe. Exhaust gas from stationary sources such as thermal power plants and other industrial combustion devices is NOx in the atmosphere X One of the main sources of which NO accounts for NO X 90-95% of the total. With NO X Emission laws and regulations are gradually becoming stricter, flue gas NO X The removal technology has also been paid more and more attention. Currently more concerned about NO X Removal techniques include selective catalytic reduction, absorption, adsorption and so on. [0003] At present, NH is mostl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/34B01D53/90B01D53/56C01C1/18
Inventor 唐晓龙康东娟易红宏宁平赵顺征李凯王川孙鑫
Owner KUNMING UNIV OF SCI & TECH
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