Halogen doped perovskite composite oxide catalyst as well as preparation method and application thereof

A composite oxide and perovskite-type technology, applied in the direction of physical/chemical process catalysts, condensation hydrocarbons with dehydrocarbons, chemical instruments and methods, etc., can solve the problem of low activity, achieve enhanced catalytic activity, Avoid the effect of loss and deep oxidation

Active Publication Date: 2012-08-08
SOUTH CHINA UNIV OF TECH
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the low activity of the existing perovskite composite oxides in the process of catalyzing the coupling of methane to prepare ethane and ethylene, and develop a halogen element with high activity and stability Doped Perovskite-Type Composite Oxide Catalysts

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
  • Halogen doped perovskite composite oxide catalyst as well as preparation method and application thereof
  • Halogen doped perovskite composite oxide catalyst as well as preparation method and application thereof
  • Halogen doped perovskite composite oxide catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 0.1 mol of Ba was prepared by EDTA-citric acid method 0.5 Sr 0.5 co 0.8 Fe 0.2 o 3-δ Cl 0.04 (abbreviated as BSCFCl 0.04 , where δ=0~0.8) powder: take 0.5mol / l Ba(NO 3 ) 2 Solution 100ml, 0.5mol / l Sr(NO 3 ) 2 Solution 100ml, 0.5mol / l Co(NO 3 ) 2 Solution 160ml, 0.2mol / l Fe(NO 3 ) 3 Solution 90ml, 0.1mol / l FeCl 2 Solution 20ml is in the beaker of 2000ml, and according to total metal ion mole number: EDTA (ethylenediaminetetraacetic acid) mole number: the ratio of citric acid mole number=1:1:2 takes by weighing EDTA 58.45g, citric acid 84.06g adds Add deionized water to the beaker to 1500ml, then add concentrated ammonia water to adjust the pH to 6, stir with a glass rod until the aqueous solution becomes clear, and finally place it on the magnetic stirring heater at a rotor speed of 500r / min at a constant temperature of 80°C Water was removed by evaporation until a dark red gel formed. The prepared gel was transferred to a 1000ml evaporating dish, placed o...

Embodiment 2

[0036] 0.1 mol of Ba was prepared by EDTA-citric acid method 0.5 Sr 0.5 co 0.8 Fe 0.2 o 3-δ Cl 0.08 (abbreviated as BSCFCl 0.08 , where δ=0~0.8) powder: take 0.5mol / l Ba(NO 3 ) 2 Solution 100ml, 0.5mol / l Sr(NO 3 ) 2 Solution 100ml, 0.5mol / l Co(NO 3 ) 2 Solution 160ml, 0.2mol / l Fe(NO 3 ) 3 Solution 80ml, 0.1mol / l FeCl 2Put 40ml of the solution in a 2000ml beaker, and weigh 58.45g of EDTA and 84.06g of citric acid into the beaker according to the ratio of total moles of metal ions: moles of EDTA: moles of citric acid=1:1:2, and then add deionized water to 1500ml, then add concentrated ammonia water to adjust the pH to 6, stir with a glass rod until the aqueous solution becomes clear, and finally place it on a magnetic stirring heater at a rotor speed of 500r / min, evaporate the water at a constant temperature of 80°C until a deep red color is formed gel. The prepared gel was transferred to a 1000ml evaporating dish, placed on an electric furnace in a fume hood and ...

Embodiment 3

[0038] 0.1 mol of Ba was prepared by EDTA-citric acid method 0.5 Sr 0.5 co 0.8 Fe 0.2 o 3-δ Cl 0.12 (abbreviated as BSCFCl 0.12 , where δ=0~0.8) powder: take 0.5mol / l Ba(NO 3 ) 2 Solution 100ml, 0.5mol / l Sr(NO 3 ) 2 Solution 100ml, 0.5mol / L Co(NO 3 ) 2 Solution 160ml, 0.2mol / l Fe(NO 3 ) 3 Solution 70ml, 0.1mol / l FeCl 2 Solution 60ml is mixed in the beaker of 2000ml to obtain mixed solution, and take by weighing EDTA58.45g, citric acid 84.06g in the beaker according to the ratio of metal ion total moles: EDTA moles: citric acid moles=1:1:2, Then add deionized water to 1500ml, then add concentrated ammonia water to adjust the pH to 6, stir with a glass rod until the aqueous solution becomes clear, and finally place it on the magnetic stirring heater at a rotor speed of 500r / min, and evaporate at a constant temperature of 80°C to remove Moisture until a dark red gel forms. The prepared gel was transferred to a 1000ml evaporating dish, placed on an electric furnace ...

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 preparation method of a halogen doped perovskite composite oxide catalyst and an application thereof in the aspect of catalyzing methane oxidative coupling, belonging to the field of nonhomogeneous catalysis. The halogen element doped composite oxide catalyst with a pure phase perovskite structure is prepared by using the EDTA-citric acid method, and the composite oxidecatalyst is applied to methane oxidative coupling reaction. Results show that the catalytic performance of the halogen element doped material in methane oxidative coupling is greatly improved, and the catalyst shows good catalytic activity stability. Thus, the catalyst is an excellent catalyst for the methane coupling reaction to prepare ethane and ethylene.

Description

technical field [0001] The invention relates to a preparation method and application of a perovskite composite oxide catalyst, in particular to a halogen-doped perovskite composite oxide catalyst and its preparation method and application. Background technique [0002] With the continuous consumption of the two types of fossil energy, coal and oil, the third type of fossil energy, natural gas, has begun to attract more and more people's attention. Natural gas is not only abundant in reserves, but also the pollution caused by its combustion is far less than that of coal and oil, so it is an ideal future energy source. However, so far, natural gas resources have not been fully developed and utilized, mainly because natural gas is a gaseous fuel with low energy density, and it is often stored in remote areas with underdeveloped economies, and it is costly to transport to industrial areas with intensive energy demand. higher. Therefore, people think of ways to convert natural ...

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): B01J27/138C07C9/06C07C11/04C07C2/84
CPCY02P20/52
Inventor 王海辉刘鸿飞魏嫣莹
Owner SOUTH CHINA UNIV OF TECH
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