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

Method for preparing denitrified catalyst through cobalt-manganese double-exchange molecular sieve

A technology of denitration catalyst and molecular sieve, which is applied in the preparation and application field of denitration catalyst, can solve the problems such as the catalytic efficiency needs to be improved, and achieve the effects of controlling production cost, high catalytic activity and simple preparation process

Inactive Publication Date: 2014-04-30
SHANGHAI UNIV
View PDF3 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

More recently, F. Bin, C. L. Song, G. L, J. O. Song, X. F. Cao, H. T. Pang, and K. P. Wang, Structural Characterization and Selective Catalytic Reduction of Nitrogen Oxides with Ammonia: A Comparison between Co / ZSM- 5 and Co / SBA-15, The Journal of Physical Chemistry C, 2012, 116, 26262-26274.) It was found that the cobalt-exchanged ZSM-5 molecular sieve has a certain nitrogen oxide NH 3 - SCR catalytic ability, but the catalytic efficiency needs to be improved

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
  • Method for preparing denitrified catalyst through cobalt-manganese double-exchange molecular sieve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Cobalt acetate and manganese acetate solutions with concentrations of 0.05 mol / L and 0.1 mol / L were prepared respectively as cobalt and manganese ion exchange liquids for later use. Take H-ZSM-5 molecular sieve, add deionized water with a mass ratio of 1:25 to molecular sieve, at 70 o C stirred and activated for 0.5 h, heated to 150 o C, and at this temperature, slowly add cobalt ion exchange liquid with a mass ratio of 0.8:1 to molecular sieves, keep at this temperature for 2 h, and then at 70 o C aging for 24 h, filtered and washed with deionized water, at 90 o C dried overnight. Mix the product and deionized water evenly at a mass ratio of 1:25, and raise the temperature to 150 o C, and at this temperature, slowly add manganese ion exchange liquid with a mass ratio of 1:1 to the step product for ion exchange for 2 h, and then at 70 o C aging for 24 h, filtered and washed with deionized water, at 90 o C dried overnight. The product was placed in a tube furnace f...

Embodiment 2

[0027] Cobalt acetate solution and 0.05 mol / L manganese acetate solution with concentration of 0.025 mol / L and manganese acetate solution respectively were prepared as cobalt and manganese ion exchange liquids for use. Take Na-ZSM-5 molecular sieve, add deionized water with a mass ratio of 1:10 to molecular sieve, at 60 o C stirred and activated for 0.5 h, heated to 140 o C, and at this temperature, slowly add cobalt ion exchange liquid with a mass ratio of 0.2:1 to molecular sieve, keep at this temperature for 2 h, and then at 60 o C aging for 24 h, filtered and washed with deionized water, at 90 o C dried overnight. Mix the product and deionized water evenly at a mass ratio of 1:10, and raise the temperature to 140 o C, and at this temperature, slowly add manganese ion exchange solution with a mass ratio of 0.5:1 to the product for ion exchange for 1 h, and then at 60 o C aging for 24 h, filtered and washed with deionized water, at 90 o C dried overnight. The product w...

Embodiment 3

[0030] Cobalt chloride solution with a concentration of 0.025 mol / L and manganese chloride solution with a concentration of 0.05 mol / L were respectively prepared as cobalt and manganese ion exchange liquids for use. Take SAPO-34 molecular sieve, add deionized water with a mass ratio of 1:15 to molecular sieve, at 70 o C stirred and activated for 0.5 h, heated to 150 o C, and at this temperature, slowly add cobalt ion exchange liquid with a mass ratio of 0.4:1 to molecular sieves, keep at this temperature for 2 h, and then at 70 o C aged for 36 h, filtered and washed with deionized water, at 90 o C dried overnight. Mix the product and deionized water evenly at a mass ratio of 1:15, and raise the temperature to 150 o C, and at this temperature, slowly add manganese ion exchange liquid with a mass ratio of 1:1 to the product for ion exchange for 2 h, and then at 70 oC Aged for 36 h, filtered and washed with deionized water, at 90 o C dried overnight. The product was placed...

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 relates to a method for preparing a denitrified catalyst by taking a molecular sieve as a carrier through cobalt-manganese metal ion double-exchange, belonging to the field of molecular sieve catalyst preparation technique and the field of environmental protection. The method mainly comprises the steps: by taking the molecular sieve as a carrier, firstly, enabling cobalt ions to enter the internal skeleton structure of the molecular sieve by using an ion exchange method, then carrying out manganese ion exchange to enter the molecular sieve on the basis of a cobalt ion exchange molecular sieve so as to realize the uniform dispersion and strong interaction of the cobalt-manganese ions, and finally calcining to obtain a high-efficiency denitrified catalyst. The catalyst has larger specific surface area, the catalyst activity of the catalyst can be effectively enhanced by utilizing double-metal synergistic effect, the temperature window can be extended, the method has the advantages of being harmless to the environment, simple in production technique, and suitable for large-scale industrial production and the like, and can be used for removing nitrogen oxide emitted by a fixed source and a mobile source.

Description

technical field [0001] The invention relates to the technical field of nitrogen oxide control in environmental protection, in particular to the preparation and application of a denitrification catalyst, which can be used for the removal of nitrogen oxides emitted from stationary sources and mobile sources. Background technique [0002] Nitrogen oxides are one of the main pollutants in the atmosphere, which can cause major environmental problems such as acid rain and photochemical smog, and cause great damage to the natural environment and biological health. At present, man-made nitrogen oxides are mainly from stationary sources represented by coal-fired power plants and mobile sources represented by diesel vehicles. Therefore, how to achieve efficient removal of nitrogen oxides has become an important research topic at present. Among the commonly used nitrogen oxide removal technologies, NH 3 Selective catalytic reduction for reducing agent (NH 3 -SCR) technology is the m...

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): B01J37/30B01J29/48B01J29/85B01J29/78B01D53/86B01D53/56
Inventor 张登松施利毅扈航蔡思翔张剑平
Owner SHANGHAI UNIV
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