Preparation method of catalyst for selective catalytic reduction of NOx in oxygen-enriched environment

A catalyst and selective technology, applied in the direction of catalyst activation/preparation, physical/chemical process catalyst, molecular sieve catalyst, etc., can solve the problems of high reaction temperature, low space velocity, low oxygen concentration, etc., to achieve high catalyst activity, preparation method Simple, simple process effects

Pending Publication Date: 2021-09-21
FUZHOU UNIV
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this patent is limited to the treatment of automobile exhaust. In addition to CO, there is a large amount of CH gas in the exhaust gas that can be used as a reducing agent, and the effect of a single CO reducing agent is not investigated.
[0007] At present, domestic and foreign 2 , There are few patents related to the selective catalytic reduction of NO by low-carbon alkanes, and the existing patents have disadvantages such as low oxygen concentration, low conversion rate, high reaction temperature, and low space velocity.

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
  • Preparation method of catalyst for selective catalytic reduction of NOx in oxygen-enriched environment
  • Preparation method of catalyst for selective catalytic reduction of NOx in oxygen-enriched environment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] First weigh 2.0g of P123 in 75mL of hydrochloric acid solution (2mol / L), stir for 4 hours in a water bath at 40°C, wait until the template is completely dissolved, weigh 0.2g of 1,3,5-mesitylene and add it dropwise to the reaction solution , and then added dropwise 4.30g TEOS, and continued to stir for 24h. Transfer the obtained milky solution into a high-pressure reactor equipped with a polytetrafluoroethylene liner, and place it in a 100°C oven for crystallization for 24 hours, take it out and cool it to room temperature, filter and wash with a large amount of deionized water until it is neutral, and dry it at room temperature overnight. The obtained white solid sample was roasted at 550°C for 5 hours, and the obtained white block was properly ground to obtain the modified pure silicon molecular sieve SBA-15-0.2TMB.

[0028] According to the above pure silicon molecular sieve SBA-15-0.2TMB saturated water absorption rate (2.4mL / g), 0.0037g chloroosmic acid hydrate was...

Embodiment 2

[0031]First weigh 2.0g of P123 in 75mL of hydrochloric acid solution (2mol / L), stir for 4 hours in a water bath at 40°C, until the template is completely dissolved, weigh 0.3g of 1,3,5-mesitylene and add it to the reaction solution dropwise , and then added dropwise 4.30g TEOS, and continued to stir for 24h. Transfer the obtained milky solution into a high-pressure reactor equipped with a polytetrafluoroethylene liner, and place it in a 100°C oven for crystallization for 24 hours, take it out and cool it to room temperature, filter and wash with a large amount of deionized water until it is neutral, and dry it at room temperature overnight. The obtained white solid sample was roasted at 550°C for 5 hours, and the obtained white block was properly ground to obtain the modified pure silicon molecular sieve SBA-15-0.3TMB. The impregnation conditions of the active components are as in Example 1, and the catalyst 0.5Os / SBA-15-0.3TMB can be obtained, and the other reaction condition...

Embodiment 3

[0033] First weigh 2.0g of P123 in 75mL of hydrochloric acid solution (2mol / L), stir for 4 hours in a water bath at 40°C, and wait until the templating agent is completely dissolved, weigh 0.4g of 1,3,5-mesitylene and add it dropwise to the reaction solution , and then added dropwise 4.30g TEOS, and continued to stir for 24h. Transfer the obtained milky solution into a high-pressure reactor equipped with a polytetrafluoroethylene liner, and place it in a 100°C oven for crystallization for 24 hours, take it out and cool it to room temperature, filter and wash with a large amount of deionized water until it is neutral, and dry it at room temperature overnight. The obtained white solid sample was roasted at 550°C for 5 hours, and the obtained white block was properly ground to obtain the modified pure silicon molecular sieve SBA-15-0.4TMB. The impregnation conditions of the active components are as in Example 1, and the catalyst 0.5Os / SBA-15-0.5TMB can be obtained, and the other ...

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
water absorptionaaaaaaaaaa
Login to view more

Abstract

The invention discloses a preparation method and application of a catalyst Os / SBA-15-M for selective catalytic reduction of nitrogen oxides (NOx) under an oxygen-enriched condition. According to the catalyst, a modified pure silicon molecular sieve SBA-15-M is used as a carrier; and the active component is metal Os and oxide OsO4 thereof, and the loading capacity of the active component is 0.1-5.0%. The preparation method of the catalyst comprises the steps: firstly, adding a pore-enlarging agent under an acidic condition to obtain a modified pure silicon molecular sieve SBA-15-M carrier, and then dipping the active component to obtain the required catalyst. The catalyst takes CO, H2, CH4 and C2H6 as reducing agents, has high activity in selective catalytic reduction of NOx under the condition of rich O2, and can obtain NO conversion rate higher than 99% under the conditions of lower temperature and high space velocity.

Description

technical field [0001] The invention relates to a catalyst for SCR in an oxygen-enriched environment and a preparation method thereof, especially with CO, H 2 、CH 4 and C 2 h 6 Selective Catalytic Reduction of NO as Reductant x catalysts and their applications. Background technique [0002] Nitrogen oxides (NO x ) is the main pollutant in the atmosphere and the main cause of acid rain, photochemical smog and ozone layer destruction. NO x It is also one of the toxic components of smog weather that has occurred frequently this year. It can cause emphysema, vision loss, bronchitis and other diseases, and it also has a great harmful effect on various crops and the ecological environment. Therefore, the elimination of air pollution NO x , becomes particularly important. [0003] There are two ways to eliminate nitrogen oxide pollution: ① Improve oil quality and improve combustion methods to suppress NO x generation; ② exhaust gas denitrification, the NO in the exhaust g...

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): B01J29/04B01J37/10B01J37/02B01J37/08B01D53/86B01D53/56
CPCB01J29/043B01J37/10B01J37/08B01J37/0201B01J37/088B01D53/8628B01J2229/16B01J2229/186
Inventor 黄清明董涛陈晓晖张国祥胡晖
Owner FUZHOU UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap