Spherical denitration catalyst and preparation method thereof

A denitrification catalyst, spherical technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of poor fluidity and dispersion of catalyst powder, large energy consumption, and unfavorable coating. , to achieve the effect of shortening the preparation time, avoiding secondary pollution, and ensuring low-temperature catalytic activity

Active Publication Date: 2018-05-01
浙江天麟环境工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods are mature in industrial application, but they often have disadvantages such as complex process, long cycle and large energy consumption.
Moreover, the fluidity and dispersibility of the catalyst powder are poor, which is not conducive to coating

Method used

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  • Spherical denitration catalyst and preparation method thereof
  • Spherical denitration catalyst and preparation method thereof
  • Spherical denitration catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] (1) Preparation of precursor salt solution:

[0052] a: 43.4g cerium nitrate (Ce(NO 3 ) 3 ·6H 2 O), 19.6g manganese acetate (Mn(CH 3 COO) 2 4H 2 O) and 75.0g aluminum nitrate (Al(NO 3 ) 3 9H 2 O) be dissolved in the deionized water of 50mL completely respectively, obtain cerium salt solution, manganese salt solution and aluminum salt solution; (the massfraction of cerium salt solution is 43.4÷93.4=46.5%, the massfraction of described manganese salt solution is 19.6% ÷69.6=28.2%, the mass fraction of the aluminum salt solution is 75÷125=60%, and the volume ratio of the cerium salt solution, the manganese salt solution and the aluminum salt solution is 1:1:1)

[0053] b: Mix the cerium salt solution, the manganese salt solution and the aluminum salt solution, heat to 30°C and stir for 1 hour to obtain the precursor salt solution; The molar amount of manganese element in the solution is 19.6÷245.08=0.08mol, the molar amount of aluminum element in the aluminum salt...

Embodiment 2

[0059] (1) Preparation of precursor salt solution:

[0060] a: 37.3g cerium chloride (CeCl 3 ·7H 2 O), 19.2 manganese chloride (MnCl 2 4H 2 O) and 75.0g aluminum nitrate (Al(NO 3 ) 3 9H 2 O) be dissolved in the deionized water of 50mL completely respectively, obtain cerium salt solution, manganese salt solution and aluminum salt solution; (the massfraction of cerium salt solution is 37.3÷87.3=42.7%, the massfraction of described manganese salt solution is 19.2% ÷69.2=27.7%, the mass fraction of said aluminum salt solution is 75÷125=60%, the volume ratio of cerium salt solution, manganese salt solution and aluminum salt solution is 1:1:1)

[0061] b: Mix the cerium salt solution, the manganese salt solution and the aluminum salt solution, heat to 40°C and stir for 1 hour to obtain the precursor salt solution; The molar amount of manganese in the solution is 19.2÷191.91=0.1mol, the molar amount of aluminum in the aluminum salt solution is 75÷375.13=0.2mol, and the molar r...

Embodiment 3

[0067] (1) Preparation of precursor salt solution:

[0068] a: 186.29g of cerium chloride (CeCl 3 ·7H 2 O) and 217.06g cerium nitrate (Ce(NO 3 ) 3 ·6H 2 O) be completely dissolved in 600mL deionized water, 245.08g manganese nitrate (Mn(NO 3 ) 2 4H 2 O) was completely dissolved in 400mL deionized water, 375.13g aluminum nitrate (Al(NO 3 ) 3 9H 2 O) and 241.43g aluminum chloride (AlCl 3 ·6H 2 O) be dissolved in the deionized water of 500mL completely, obtain cerium salt solution, manganese salt solution and aluminum salt solution; (the mass fraction of cerium salt solution is 403.35÷1003.35=40.2%, the mass fraction of described manganese salt solution is 245.08÷ 645.08=38%, the mass fraction of the aluminum salt solution is 616.56÷1116.56=55.22%, the volume ratio of the cerium salt solution, the manganese salt solution and the aluminum salt solution is 1.2:0.8:1)

[0069] b: Mix cerium salt solution, manganese salt solution and aluminum salt solution, heat to 30°C an...

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Abstract

The invention discloses a spherical denitration catalyst and a preparation method thereof, and belongs to the field of catalysts. The preparation method of the spherical denitration catalyst comprisesthe following steps: (1) preparing a precursor salt solution; (2) preparing a precursor; and (3) drying the precursor, and then calcining the dried precursor to obtain a spherical denitration catalyst powder. The invention also discloses the spherical denitration catalyst. According to the spherical denitration catalyst and the preparation method thereof, the preparation cycle is short, and the operation is simple, thus the preparation method can be used for large-batch continuous production; and the prepared spherical denitration catalyst powder has a high low-temperature activity, and has excellent fluidity and dispersibility, so that in overall catalyst coating, increase of coating thickness and load capacity is facilitated.

Description

technical field [0001] The invention belongs to the field of catalysts, and in particular relates to a spherical denitration catalyst and a preparation method thereof. Background technique [0002] Exhaust gases from coal-fired power plants contain large amounts of nitrogen oxides (NO x ), if it is not handled properly, it will cause environmental problems such as acid rain, photochemical smog, smog, and even the destruction of the ozone layer. As early as the 1980s, Japan, Europe, and the United States successively applied SCR technology to industrial flue gas treatment. V 2 o 5 / TiO 2 It is currently the most widely used commercial overall NH 3 -SCR catalyst system has been industrialized for many years. The flue gas temperature of stationary sources such as most power plants in my country is generally low, and it is difficult to reach the optimal operating temperature of commercial vanadium-based catalysts. In order to obtain higher denitrification activity, another...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/34B01J37/00B01D53/86B01D53/56
CPCB01D53/8628B01D2258/0283B01J23/002B01J23/34B01J37/0045B01J37/0072B01J2523/00B01J2523/31B01J2523/3712B01J2523/72
Inventor 代斌王超朱明远于锋
Owner 浙江天麟环境工程有限公司
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