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

Denitration catalyst, preparation method thereof and denitration method

A denitration catalyst and catalyst technology, applied in the field of denitration, can solve the problems of low crystallinity, poor stability, and small specific surface area of ​​porous titanium dioxide materials, and achieve the effect of promoting low temperature denitration performance.

Pending Publication Date: 2022-05-17
CHINA BUILDING MATERIALS ACAD
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

TiO 2 It can produce "strong interaction" with the active component metal elements, and is currently the commonly used SCR denitration catalyst carrier, but porous titanium dioxide materials have defects such as small specific surface area, poor stability and low crystallinity

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, preparation method thereof and denitration method
  • Denitration catalyst, preparation method thereof and denitration method
  • Denitration catalyst, preparation method thereof and denitration method

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0041] Some embodiments of the present invention provide a method for preparing a denitration catalyst, comprising the following steps:

[0042] S1 Roasting MIL-125(Ti) powder to obtain MOFs derivative porous nano-TiO 2 ;

[0043] Described MIL-125 (Ti) powder is made through the following steps:

[0044] (1) Ultrasonically mix N,N-dimethylformamide, terephthalic acid and anhydrous methanol to obtain a transparent mixed solution; the N,N-dimethylformamide, terephthalic acid and The weight ratio of water and methanol is (47-57):(1-5):(2-8). By controlling the ratio of these to (47-57):(1-5):(2-8) to synthesize MIL-125 with uniform size, non-agglomerated spherical structure, no impurities and good crystal form ); terephthalic acid is mainly used as a ligand to form a complex with a Ti source; the difference in the ratio of N,N-dimethylformamide and anhydrous methanol will cause a difference in the degree of coordination between the metal ion and the organic ligand. This in t...

Embodiment 1

[0063] This embodiment provides a method for preparing a denitration catalyst, comprising the following steps:

[0064](1) Measure 54mL of N,N-dimethylformamide, 3g of terephthalic acid and 6mL of anhydrous methanol, and mix them uniformly by ultrasonic to obtain a transparent mixed solution.

[0065] (2) Add 1.56 mL of tetrabutyl titanate to the above mixed solution, continue ultrasonic stirring for 15 min, and then transfer to a stainless steel autoclave at 150° C. for 48 h.

[0066] (3) After the reaction is completed, the temperature is naturally lowered, the obtained mixed solution is suction-filtered, and then washed three times with N,N-dimethylformamide and methanol respectively and suction-filtered, and finally the washed product is put into a vacuum drying oven Dry overnight (24h) at 105°C to obtain MIL-125(Ti) powder.

[0067] (4) The MIL-125(Ti) powder prepared above was heated in a muffle furnace at 2°C / min to 350°C, and calcined for 3h to obtain MOFs derivative ...

Embodiment 2

[0071] This embodiment provides a method for preparing a denitration catalyst, comprising the following steps:

[0072] (1) Measure 54mL of N,N-dimethylformamide, 3g of terephthalic acid and 6mL of anhydrous methanol, and mix them uniformly by ultrasonic to obtain a transparent mixed solution.

[0073] (2) Add 1.56 mL of tetrabutyl titanate to the above mixed solution, continue ultrasonic stirring for 15 min, and then transfer to a stainless steel autoclave at 150° C. for 48 h.

[0074] (3) After the reaction is completed, the temperature is naturally lowered, the obtained mixed solution is filtered by suction, and then washed three times with N,N-dimethylformamide and methanol respectively and filtered by suction, and finally the washed product is put into a vacuum drying box Dry overnight at 105°C to obtain MIL-125(Ti) powder.

[0075] (4) The MIL-125(Ti) powder prepared above was heated to 350°C at a rate of 2°C / min in a muffle furnace, and calcined for 3h to obtain MOFs d...

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

PropertyMeasurementUnit
Granularityaaaaaaaaaa
Specific surface areaaaaaaaaaaa
Login to View More

Abstract

The invention relates to a denitration catalyst, a preparation method thereof and a denitration method, and the preparation method of the denitration catalyst comprises the following steps: roasting MIL-125 (Ti) powder to obtain MOFs derivative porous nano TiO2; dissolving vanadium salt and tin salt in deionized water in sequence, and stirring until the vanadium salt and the tin salt are dissolved to obtain a metal precursor solution; and adding the obtained MOFs derivative porous nano TiO2 into the obtained metal precursor solution, dipping, drying and roasting to obtain the denitration catalyst. The prepared denitration catalyst has many excellent characteristics, such as an amorphous state, a large specific surface area (120-150m < 2 >. G <-1 >) and a relatively regular spherical crystal morphology, is beneficial to dispersion of active components on the surface of the denitration catalyst, and has a promoting effect on the low-temperature denitration performance of the catalyst.

Description

technical field [0001] The invention relates to the technical field of denitration, in particular to a denitration catalyst, a preparation method thereof and a denitration method. Background technique [0002] Nitrogen oxides (NOx) are one of the main sources of air pollution. It not only causes environmental problems such as photochemical smog, acid rain, ozone depletion, and greenhouse effect, but also has great harm to human health. Therefore, the reduction and treatment of nitrogen oxides has become an important issue in environmental protection at the present stage. Selective Catalytic Reduction (Selective Catalytic Reduction, SCR) technology uses NH3 as a reducing agent to selectively reduce NOx to N2 and H2O under the action of a denitration catalyst. Compared with selective non-catalytic reduction (SNCR) technology, it has lower ammonia escape rate and higher denitrification activity (>80%), and is widely used in the removal of nitrogen oxides from stationary sou...

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
IPC IPC(8): B01J21/06B01J23/00B01J23/22B01J35/02B01J35/10B01J37/02B01J37/08B01D53/86B01D53/56
CPCB01J21/063B01J23/002B01J23/22B01J37/086B01J37/0201B01D53/8628B01J2523/00B01J35/40B01J35/615B01J2523/43B01J2523/47B01J2523/55
Inventor 梁海龙吴彦霞陈玉峰胡利明王春朋
Owner CHINA BUILDING MATERIALS ACAD
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

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com