Unlock instant, AI-driven research and patent intelligence for your innovation.

Compound oxide catalyst for catalytic decomposition of N2O and preparation method thereof

A composite oxide and catalytic decomposition technology, which is used in the field of composite oxide catalysts for catalytic decomposition of N2O into O2 and N2 and their preparation, can solve the problems of high decomposition temperature, low decomposition efficiency, low roasting temperature, etc., and achieves good low-temperature activity. , the preparation is simple, the effect of high practical value

Inactive Publication Date: 2012-06-27
FUDAN UNIV +1
View PDF6 Cites 26 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Although some in the prior art described above have better activity, the calcination temperature is on the low side, and there is still a big gap from industrial application, and the decomposition temperature that has is higher, and the decomposition efficiency that has is low, and the carrier and activity The combination of components in N 2 O decomposition reaction has not been reported yet

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
  • Compound oxide catalyst for catalytic decomposition of N2O and preparation method thereof
  • Compound oxide catalyst for catalytic decomposition of N2O and preparation method thereof
  • Compound oxide catalyst for catalytic decomposition of N2O and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Cu 0.2 Ce 0.8 o y Composite oxide catalyst is prepared as follows:

[0028] Weigh 0.02mol copper nitrate and 0.08mol cerium nitrate, and dissolve them in 100mL distilled water. Then 0.2mol citric acid is dissolved in 50mL water, after two kinds of aqueous solutions are mixed completely, ventilate and dry at 80 ℃, heat and roast in the muffle furnace after obtaining the dry mixture, heating temperature is 500 ℃. The roasting time is 6h.

[0029] 0.2 g of the prepared Cu 0.2 Ce 0.8 o y The composite oxide catalyst was loaded into a quartz reaction tube with a diameter of 5 mm, and the N 2 After O is mixed with helium, it is passed into the reaction tube and enters the catalytic bed for reaction. The reaction temperature is 200-600°C, the reaction system pressure is 0.1MPa, N 2 O concentration is 2600ppm (helium is the balance gas), and the mixed gas hourly space velocity range is 10000h -1 N 2 O decomposition. N 2 The complete conversion temperature of O is 44...

Embodiment 2

[0031] Cu 0.5 Ce 0.5 o y Composite oxide catalyst is prepared as follows:

[0032] Weigh 0.05mol of copper nitrate and 0.05mol of cerium nitrate, and dissolve them in 100mL of distilled water. Then 0.2mol citric acid is dissolved in 50mL water, after two kinds of aqueous solutions are mixed completely, ventilate and dry at 80 ℃, heat and roast in the muffle furnace after obtaining the dry mixture, heating temperature is 500 ℃. The roasting time is 6h.

[0033] 0.2 g of the prepared Cu 0.5 Ce 0.5 o y The composite oxide catalyst was loaded into a quartz reaction tube with a diameter of 5 mm, and the N 2 After O is mixed with helium, it is passed into the reaction tube and enters the catalytic bed for reaction. The reaction temperature is 200-600°C, the reaction system pressure is 0.1MPa, N 2 O concentration is 2600ppm (helium is the balance gas), and the mixed gas hourly space velocity range is 10000h -1 N 2 O decomposition. N 2 The complete conversion temperature o...

Embodiment 3

[0035] Cu 0.8 Ce 0.2 o y Composite oxide catalyst is prepared as follows:

[0036] Weigh 0.08mol of copper nitrate and 0.02mol of cerium nitrate, and dissolve them in 100mL of distilled water. Then 0.2mol citric acid is dissolved in 50mL water, after two kinds of aqueous solutions are mixed completely, ventilate and dry at 80 ℃, heat and roast in the muffle furnace after obtaining the dry mixture, heating temperature is 500 ℃. The roasting time is 6h.

[0037] 0.2 g of the prepared Cu 0.8 Ce 0.2 o y The composite oxide catalyst was loaded into a quartz reaction tube with a diameter of 5 mm, and the N 2 After O is mixed with helium, it is passed into the reaction tube and enters the catalytic bed for reaction. The reaction temperature is 200-600°C, the reaction system pressure is 0.1MPa, N 2 O concentration is 2600ppm (helium is the balance gas), and the mixed gas hourly space velocity range is 10000h -1 N 2 O decomposition. N 2 The complete conversion temperature o...

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 belongs to the technical fields of chemistry and chemical engineering, in particular to a compound oxide catalyst for the catalytic decomposition of N2O into O2 and N2 and a preparation method thereof. The catalyst disclosed by the invention is a compound oxide comprising copper oxide and cerium oxide, the molecular general formula is CuxCel-xOy, x is greater than 0 and smaller than 1, y is greater than 1 and smaller than 2, and cerium atoms enter the crystal lattices of the copper oxide so as to form a synergistic action; and further, the compound oxide catalyst also comprises an auxiliary metal oxide of rare-earth metal, transition metal, alkali metal or alkaline-earth metal. The preparation method comprises the following steps of: dissolving corresponding metallic salt and an organic complexing agent into water respectively, drying at high temperature so as to obtain a catalyst precursor and then calcining the catalyst precursor at the high temperature so as to obtain the catalyst. The compound oxide catalyst has a simple preparation process. The prepared catalyst has high-efficiency catalytic activity and stability and high-efficiency N2O decomposing activity, and the decomposition rate of the N2O at 400 DEG C reaches 100 percent.

Description

technical field [0001] The invention belongs to the technical field of chemistry and chemical engineering, and in particular relates to a catalyst used in air pollution control technology and a preparation method thereof, in particular to a catalyst for catalytically decomposing N 2 O into O 2 and N 2 Composite oxide catalyst and preparation method thereof. Background technique [0002] N 2 O is a greenhouse gas, due to its stability in nature, it has a strong destructive effect on the atmospheric ozone layer, and its greenhouse gas effect is more than 300 times that of carbon dioxide. Studies have shown that nitric acid, adipic acid production, and motor vehicle exhaust contain N 2 O. N in the original atmosphere 2 There is a spontaneous equilibrium process for O, that is, the emission and degradation rates are basically the same. However, with the improvement of industrialization and the rapid increase of the number of motor vehicles, the N in the atmosphere 2 O co...

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): B01J23/83B01J23/889B01D53/86B01D53/56
CPCY02C20/10
Inventor 徐华龙周海波沈伟冯晓民李楠刘琼秦枫
Owner FUDAN UNIV
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com