Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Denitration catalyst as well as preparation method and application thereof

A denitration catalyst and molecular sieve technology, applied in the field of catalysis, can solve the problems of good low temperature activity, no sulfur resistance, poor low temperature activity, etc., and achieve the effects of improving electron migration, excellent denitration activity, and excellent catalytic activity.

Active Publication Date: 2022-04-12
DALIAN UNIV OF TECH
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004]Aiming at the existing problems of low-temperature denitrification catalysts, namely: resistance to sulfur but poor low-temperature activity, good low-temperature activity but no sulfur resistance

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Denitration catalyst as well as preparation method and application thereof
  • Denitration catalyst as well as preparation method and application thereof
  • Denitration catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0116] With 12.3g of 50wt% manganese nitrate solution, 4.6g Cu(NO 3 ) 2 ·6H 2 O, 1.5g La(NO 3 ) 3 ·6H 2 Dissolve O in 30g deionized water, stir evenly, add 10g ZSM-5 zeolite molecular sieve, then stir at room temperature for 3h, evaporate the water to dry the solid obtained at 110°C for 10h, then roast at 540°C for 3h to obtain the Mn-Cu-La catalyst (denoted as Mn-Cu-La / ZSM-5).

Embodiment 2

[0118] With 12.3g of 50wt% manganese nitrate solution, 4.6g Cu(NO 3 ) 2 ·6H 2 O, 1.5g La(NO 3 ) 3 ·6H 2 Dissolve O in 30g deionized water, stir evenly, add 10g ZSM-5 zeolite molecular sieve, then stir at room temperature for 3h, evaporate the water to dry the solid obtained at 110°C for 10h, then roast at 540°C for 3h to obtain the Mn-Cu-La catalyst . The obtained 5g Mn-Cu-La catalyst was placed in a mixed solution consisting of 2g silica sol, 1g titanium dioxide, 1g tetrapropylammonium hydroxide solution and 49g deionized water, and the solid obtained by crystallization at 170°C for 48h was subjected to Filtration, drying, and roasting, the roasting condition is 540° C. for 3 hours, to obtain the denitration catalyst precursor. Add the denitration catalyst precursor to 0.025mol / L NaOH alkali solution, the solid-to-liquid ratio is 1:10 (g:ml), stir, transfer the slurry to a hydrothermal synthesis kettle, and put it in an oven (170°C) for Hydrothermal recrystallization 2...

Embodiment 3

[0122] With 12.3g of 50wt% manganese nitrate solution, 4.6g Cu(NO 3 ) 2 ·6H 2 O, 1.5g La(NO 3 ) 3 ·6H 2 Dissolve O in 30g deionized water, stir evenly, add 10g ZSM-5 zeolite molecular sieve, then stir at room temperature for 3h, evaporate the water to dry the solid obtained at 110°C for 10h, then roast at 540°C for 3h to obtain the Mn-Cu-La catalyst . The obtained 5g Mn-Cu-La catalyst was placed in a mixed solution consisting of 0.6g white carbon black, 1g titanium dioxide, 1gTPAOH (tetrapropylammonium hydroxide) solution and 49g deionized water, and crystallized at 170°C for 48h , the obtained solid was filtered, dried and calcined at 540° C. for 3 h to obtain a denitration catalyst precursor. Add the denitrification catalyst precursor to 0.075mol / L TPAOH solution, the solid-to-liquid ratio is 1:10 (g:ml), stir, transfer the slurry to a hydrothermal synthesis kettle, put it in an oven (170°C) for hydrothermal Thermal recrystallization for 24h. The solid was isolated b...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a denitration catalyst. The denitration catalyst comprises a molecular sieve and a protective layer, the protective layer is coated on the surface of the molecular sieve; the molecular sieve is loaded with an active component; and the protective layer contains a SiOx-TiOx crystal substance. The invention further discloses a preparation method of the denitration catalyst and application of the denitration catalyst in denitration of waste gas containing water and / or sulfur. The denitration catalyst has good low-temperature denitration activity (lt; and the Ti content of the SiOx-TiOx crystal substance protective layer is increased in a gradient manner, so that the water resistance and sulfur resistance of the denitration catalyst are greatly improved, and the denitration catalyst can be reused through regeneration.

Description

technical field [0001] The application relates to a denitrification catalyst and its preparation method and application, belonging to the technical field of catalysis. Background technique [0002] Nitrogen oxides (NO x ) is one of the main air pollutants and is the cause of acid rain, photochemical smog and PM 2.5 It is an important precursor of secondary pollution, which will cause great harm to human health and ecological environment. NO emissions from human activities x , most of which come from the combustion process of fossil fuels, such as the combustion process of automobiles, aircraft, internal combustion engines and industrial furnaces; also from the production and use of nitric acid (salt), such as nitrogen fertilizer plants, organic intermediate plants, non-ferrous and ferrous metal smelting factory etc. In recent years, with the continuous and rapid development of China's economy and the continuous increase of urbanization and industrialization, NO x Emissi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/16B01J29/48B01J29/78B01J33/00B01D53/86B01D53/56
Inventor 刘家旭贺宁谢宏彬
Owner DALIAN UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products