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

Cerous phosphate based catalyst for zero-valent mercury oxidation, preparation method and applications thereof

A cerium phosphate-based catalyst technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, separation methods, etc., can solve the problems of large influence on zero-valent mercury oxidation activity and poor mercury oxidation effect, and achieve the goal of getting rid of dependence Sexuality, easy operation, and the effect of promoting oxidation

Active Publication Date: 2015-03-11
ZHEJIANG UNIV
View PDF8 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Although the above two disclosed alum-based catalysts have good anti-sulfur effects, their zerovalent mercury oxidation activity is greatly affected by the components of the flue gas, especially the dependence on HCl in the flue gas is strong, and in the actual flue gas Oxidation of mercury is poor under conditions

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
  • Cerous phosphate based catalyst for zero-valent mercury oxidation, preparation method and applications thereof
  • Cerous phosphate based catalyst for zero-valent mercury oxidation, preparation method and applications thereof
  • Cerous phosphate based catalyst for zero-valent mercury oxidation, preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Catalyst preparation:

[0038] (1) Mix cerium nitrate hexahydrate and phosphoric acid at a molar ratio of 1:1, add a certain amount of urea (the molar ratio to cerium nitrate is 2 to 3), react at 80°C for 2 hours, cool the resulting mixture, let it stand, After washing, a white precipitate of cerium phosphate was obtained.

[0039] (2) Dissolve 0.6 mmol of cobalt nitrate in 200 ml of deionized water, add 0.02 mol of cerium phosphate obtained in step (1), and stir evenly. (the same below)

[0040] (3) After the mixture obtained in step (2) is dried, it is calcined at 300° C. for 8 hours in an air atmosphere to obtain a catalyst.

Embodiment 2

[0042] Catalyst preparation:

[0043] (1) Mix cerium nitrate hexahydrate and phosphoric acid at a molar ratio of 1:1, add a certain amount of urea (the molar ratio to cerium nitrate is 2 to 3), react at 80°C for 2 hours, cool the resulting mixture, let it stand, After washing, a white precipitate of cerium phosphate was obtained.

[0044] (2) Dissolve 0.6 mmol of manganese nitrate in 200 ml of deionized water, add 0.02 mol of cerium phosphate obtained in step (1), and stir evenly.

[0045] (3) After the mixture obtained in step (2) is dried, it is calcined at 300° C. for 8 hours in an air atmosphere to obtain a catalyst.

Embodiment 3

[0047] Catalyst preparation:

[0048] (1) Mix cerium nitrate hexahydrate and phosphoric acid at a molar ratio of 1:1, add a certain amount of urea (the molar ratio to cerium nitrate is 2 to 3), react at 90°C for 2 hours, cool the resulting mixture, let it stand, After washing, a white precipitate of cerium phosphate was obtained.

[0049] (2) Dissolve 0.6 mmol of copper nitrate in 200 ml of deionized water, add 0.02 mol of cerium phosphate obtained in step (1), and stir evenly.

[0050] (3) After the mixture obtained in step (2) is dried, it is calcined at 300° C. for 8 hours in an air atmosphere to obtain a catalyst.

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 cerous phosphate based catalyst for zero-valent mercury oxidation. The catalyst is mainly composed of cerous phosphate, and comprises modification components; wherein the modification components are composed of at least one oxide of cobalt, manganese, copper, iron, vanadium, cerium, molybdenum, tin, and the like. The invention also discloses a preparation method and applications of the catalyst. The preparation process is simple, and the operation is convenient. Compared to the prior art, the catalyst has the following advantages: (1) the active components of the catalyst are all common metal oxides, the common metal phosphate is taken as the carrier, the raw materials are simple and easily available, and the operation is convenient; (2) the catalyst has a very good sulfur-resistant performance; (3) the CePO4 catalyst, which has been modified by metal oxides, is well adapt to the flue gas. The provided catalyst can fully utilizes the NO in flue gas to greatly promote the oxidation of zero-valent mercury. The great dependence on HCl of conventional catalysts is gotten rid of.

Description

technical field [0001] The invention relates to the technical field of air pollution control, in particular to a cerium phosphate-based catalyst modified with metal oxides, a preparation method and application. Background technique [0002] Mercury is volatile, persistent and bioaccumulative, and thus has great hazards to living organisms. Due to its high volatility and low water solubility, mercury can stay in the atmosphere for as long as half a year to two years, and it is easy to form global pollution through long-distance atmospheric transport. Mercury and its compounds in the atmosphere, mercury-containing pesticides and fertilizers, and mercury in the soil can all be absorbed by plants. When the mercury content in the growth environment is too high, the mercury will quickly accumulate in the plant, causing serious poisoning to the plant, causing the leaves to fall off and wither. Mercury accumulated in plants will enter animals and humans through the food chain and ...

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): B01J27/185B01J27/187B01J27/18B01J27/198B01J27/19B01D53/86B01D53/64
Inventor 翁小乐梅荣军吴忠标刘越王海强
Owner ZHEJIANG 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