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

A kind of cerium molybdenum zirconium composite oxide catalyst, its preparation method and application

A technology of composite oxides and catalysts, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve low conversion rate, thermal stability and anti-sintering ability Poor, narrow temperature window and other problems, to achieve high conversion rate, excellent thermal stability and anti-sintering ability, wide temperature window effect

Active Publication Date: 2017-01-25
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problems of the existing cerium-molybdenum-zirconium composite oxide catalyst with narrow temperature window, low conversion rate, poor thermal stability and anti-sintering ability, one of the purposes of the present invention is to provide a cerium-molybdenum-zirconium composite oxide catalyst

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
  • A kind of cerium molybdenum zirconium composite oxide catalyst, its preparation method and application
  • A kind of cerium molybdenum zirconium composite oxide catalyst, its preparation method and application
  • A kind of cerium molybdenum zirconium composite oxide catalyst, its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～6

[0052] A preparation method of cerium molybdenum zirconium composite oxide catalyst, comprising the steps of:

[0053] (1) Dissolve cerium nitrate and zirconium nitrate in deionized water, stir until completely dissolved, add ammonium molybdate aqueous solution, and then add water to about 250mL to obtain a precursor solution of cerium, molybdenum, and zirconium, and control cerium, molybdenum, and zirconium The concentration of cerium, molybdenum and zirconium ions in the precursor solution;

[0054] (2) Add urea to the precursor solution of cerium, molybdenum, and zirconium obtained in step (1), stir at 90°C for 12 hours to precipitate metal ions, and obtain a mixed solution; the urea and metal ions (cerium, molybdenum, and zirconium ions The sum of moles) has a molar ratio of 10;

[0055] (3) After cooling the mixed liquid obtained in step (2) to room temperature, filter the precipitate to obtain the precipitate, wash the precipitate to neutrality, then dry it in an oven a...

Embodiment 7

[0079] A preparation method of cerium molybdenum zirconium composite oxide catalyst, comprising the steps of:

[0080] (1) Dissolve the cerium precursor and zirconium precursor in deionized water, stir until completely dissolved, then add the aqueous solution of the molybdenum precursor, and then add water to about 250mL to obtain the precursor solution of cerium, molybdenum, and zirconium, and control the cerium, molybdenum, and zirconium precursor solutions. The concentration of cerium in the precursor solution of molybdenum and zirconium is 0.06mol / L, the concentration of molybdenum is 0.06mol / L, and the concentration of zirconium is 0.12mol / L;

[0081] (2) Add urea to the precursor solution of cerium, molybdenum and zirconium obtained in step (1), stir and precipitate metal ions at 80°C to obtain a mixed solution; the precipitant and metal ions (cerium, molybdenum, zirconium ions sum) the molar ratio is 8;

[0082](3) After cooling the mixed liquid obtained in step (2) to...

Embodiment 8

[0085] A preparation method of cerium molybdenum zirconium composite oxide catalyst, comprising the steps of:

[0086] (1) Dissolve the cerium precursor and the zirconium precursor in deionized water, stir until completely dissolved, then add the aqueous solution of the molybdenum precursor, and then add water to about 250mL to obtain the precursor solution of cerium, molybdenum, and zirconium, and control the cerium, molybdenum, and zirconium precursor solutions. The concentration of cerium in the precursor solution of molybdenum and zirconium is 0.1mol / L, the concentration of molybdenum is 0.1mol / L, and the concentration of zirconium is 0.2mol / L;

[0087] (2) Add urea to the precursor solution of cerium, molybdenum and zirconium obtained in step (1), stir and precipitate metal ions at 95°C to obtain a mixed solution; the precipitant and metal ions (cerium, molybdenum, zirconium ions and the molar ratio of 15;

[0088] (3) After cooling the mixed liquid obtained in step (2) ...

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 present invention relates to a cerium-molybdenum-zirconium composite oxide catalyst. In the catalyst, the molar ratio of cerium to zirconium is 1:2 and the molar ratio of molybdenum to cerium is 0.1-1.5. By the present invention, the catalyst used for the conversion of nitrogen oxide, with wide temperature window, high conversion rate, excellent thermal stability and anti-sintering ability, is obtained by adjusting the ratio of cerium, molybdenum and zirconium in the cerium-molybdenum-zirconium composite oxide catalyst; and the preparation process is simple, low in cost and easily industrialized.

Description

technical field [0001] The invention relates to a cerium-molybdenum-zirconium composite oxide catalyst, its preparation method and application, in particular to a cerium-molybdenum-zirconium composite oxide catalyst for selective catalytic reduction of nitrogen oxides, its preparation method and application. Background technique [0002] NH 3 -SCR technology uses ammonia (NH 3 ) as reducing agent, selectively catalytic reduction of nitrogen oxides (NO x )Technology. NH 3 -SCR technology is widely used in stationary and mobile sources of NO x Catalytic removal. [0003] According to the different active components, NH 3 -SCR catalysts can be classified into molecular sieve catalysts, activated carbon catalysts and metal oxide catalysts. Molecular sieve catalysts mainly include ZSM-5, HBEA, SSZ-34 and SAPO-34, etc., and the supported active components mainly include transition metal elements such as Cu, Fe, Ce or rare earth metal elements, but the cost is high, which is...

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 Patents(China)
IPC IPC(8): B01J23/28B01D53/90B01D53/94B01D53/56
CPCB01D53/9418B01D2251/2062B01D2251/2067B01D2255/20769B01D2255/407B01D2258/012B01D2258/0283B01J23/28B01J2523/00Y02A50/20B01J2523/3712B01J2523/48B01J2523/68
Inventor 贺泓丁世鹏刘福东石晓燕
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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