Denitration catalyst activity mother liquor preparation method and application of denitration catalyst activity mother liquor

A denitration catalyst and active technology, applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve the problems of easy blockage of pore structure, loss, easy aggregation of active substances, etc., and achieve high filtration accuracy and enhanced bonding. High performance and mechanical strength

Inactive Publication Date: 2015-08-19
GUANGZHOU DEVOTION THERMAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of this method are: 1. The combination of the active matter and the carrier is not good, and it is easily lost after being washed out during use; 2. The active matter and the calcination process are easy to aggregate, and the dispersion effect is not good
3. The mother liquor prepared by this method has poor adaptability, and the whole body of the carrier is easy to block the pore structure, resulting in a decrease in the denitrification reaction activity, especially not suitable for porous ceramic tube carriers

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A ceramic denitration catalyst unit, its mass components are: cordierite ceramic tube carrier 2000 grams, titanium dioxide-silicon dioxide (TiO2-SiO2) 61.1 grams, active vanadium pentoxide (V 2 o 5 ) 0.2 g, tungsten trioxide (WO 3 ) 0.6 g.

[0034] The preparation method of ceramic denitration catalyst unit is as follows: Step 1, configuration concentration is 80g of oxalic acid solution of 5%, then 20g ammonium metatungstate ((NH 4 ) 10 W 12 o 41 ~xH 2 O) Dissolve completely in oxalic acid solution, then add active titanium dioxide (TiO 2 ) and silicon dioxide (SiO 2 ) powder is 1960g in total and stirred evenly to form a mixed solution, for TiO 2 -SiO 2 The mixed solution is dried and calcined in sequence, the drying temperature is 100°C, the drying time is 3 hours, the calcination temperature is 500°C, and the calcination time is 4 hours; finally TiO 2 -SiO 2 / WO 3 Powder 1980 g.

[0035] Step 2: configuration concentration is 5% oxalic acid solution, th...

Embodiment 2

[0038] A ceramic denitration catalyst unit, its mass components are: cordierite ceramic tube carrier 4000 grams, titanium dioxide-silicon dioxide (TiO2-SiO2) 185.8 grams, active vanadium pentoxide (V 2 o 5 ) 4.3 grams, tungsten trioxide (WO 3 ) 20.4 grams.

[0039] The preparation method of ceramic denitration catalyst unit is as follows: Step 1, configuration concentration is 3% oxalic acid solution 80g, then 30g ammonium metatungstate ((NH 4 ) 10 W 12 o 41 ~xH 2 O) Dissolve completely in oxalic acid solution, then add active titanium dioxide (TiO 2 ) and silicon dioxide (SiO 2 ) powder is a total of 267g and stirred evenly to form a mixed solution, for TiO 2 -SiO 2 The mixed solution is dried and calcined in sequence, the drying temperature is 110°C, the drying time is 4 hours, the calcination temperature is 550°C, and the calcination time is 5 hours; finally TiO 2 -SiO 2 / WO 3 Powder 297 g.

[0040] Step 2: another configuration concentration is 3% oxalic acid ...

Embodiment 3

[0043] A ceramic denitration catalyst unit, its mass components are: cordierite ceramic tube carrier 6000 grams, titanium dioxide-silicon dioxide (TiO2-SiO2) 392.1 grams, active vanadium pentoxide (V 2 o 5 ) 12.5 grams, tungsten trioxide (WO 3 ) 47.1 grams.

[0044] The preparation method of ceramic denitration catalyst unit is as follows: Step 1, configuration concentration is 80g of oxalic acid solution of 6%, then 30g ammonium metatungstate ((NH 4 ) 10 W 12 o 41 ~xH 2 O) Dissolve completely in oxalic acid solution, then add active titanium dioxide (TiO 2 ) and silicon dioxide (SiO 2 ) powder is 245g in total and stirred evenly to form a mixed solution, for TiO 2 -SiO 2 The mixed solution is dried and calcined in sequence, the drying temperature is 100°C, the drying time is 3 hours, the calcination temperature is 550°C, and the calcination time is 5 hours; finally TiO 2 -SiO 2 / WO 3 Powder 274 g.

[0045] Step 2: another configuration concentration is 6% oxalic ...

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Abstract

The invention discloses a denitration catalyst activity mother liquor preparation method, which comprises the following steps: dissolving ammonium metatungstate and ammonium metavanadate into oxalic acid solutions respectively; adding active TiO2 and SiO2 mixed powder into the oxalic acid solution which contains the ammonium metatungstate, mixing, then drying and calcining; adding obtained TiO2-SiO2 / WO3 mixed powder into the oxalic acid solution which contains the ammonium metavanadate, and mixing; finally adding binder to obtain denitration catalyst activity mother liquor. The invention further discloses an application of the denitration catalyst activity mother liquor. The denitration catalyst activity mother liquor is sprayed onto the inner side of a dedusting element; after drying and calcining are carried out, a dedusting unit provided with a denitration catalyst coating which contains TiO2-SiO2 / WO3 / V2O5 active matters is formed. By applying the preparation method disclosed by the invention, the stability of the active denitration catalyst mother liquor is high, the combinability of the active denitration catalyst on the dedusting element is high, and the active denitration catalyst can be widely applied to porous ceramic tube carriers for dedusting.

Description

technical field [0001] The invention belongs to the technical field of catalysts, in particular to a preparation method and application of a denitration catalyst. Background technique [0002] Energy, chemical industry, metallurgy, cement, glass, ceramics and other industries and fields will involve the combustion of coal, oil, natural gas, biomass and other fuels. In addition, there are medical waste and garbage incineration. The flue gas emitted after combustion contains A large amount of dust, nitrogen oxides, sulfur oxides, and other gaseous pollutants. A large amount of smoke and gas pollutants are discharged into the air, which will cause serious air pollution, such as smog, acid rain, photochemical smog, etc. When the human body inhales particles smaller than 5 μm, it can easily penetrate into the lungs, causing toxic pneumonia or silicosis, and sometimes lung cancer. Once the pollutants deposited in the lungs are dissolved, they will directly invade the blood, caus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/30B01D53/88B01D53/56B01D53/90
Inventor 李碧常厚春马革邹富豪古雄云谭勇光秦飞
Owner GUANGZHOU DEVOTION THERMAL TECH
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