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

Methane complete combustion catalyst and preparation method thereof

A complete combustion, methane combustion technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of low methane combustion activity, increase specific surface area, specific surface area Small and other problems, to achieve the effect of low preparation cost, simple process and high degree of dispersion

Inactive Publication Date: 2016-07-13
HUBEI UNIV OF TECH
View PDF0 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the LaNiO prepared by the prior art 3 The disadvantages and deficiencies of low methane combustion activity and small specific surface area provide a highly active NiO / LaNiO 3 The preparation method of composite methane combustion catalytic material, this method is passed to LaNiO 3 In situ acetic acid chemical etching, selective and preferential removal of part of La 2 o 3 , making the surface rougher, increasing the specific surface area of ​​the sample, and finally the LaNiO 3 In situ generation of NiO on the surface to obtain NiO / LaNiO 3 Composite Methane Combustion Catalytic Materials

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
  • Methane complete combustion catalyst and preparation method thereof
  • Methane complete combustion catalyst and preparation method thereof
  • Methane complete combustion catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Under the conditions of stirring and room temperature, dissolve lanthanum nitrate, nickel nitrate, and citric acid in water or absolute ethanol solution at a molar ratio of 1:1:2, and stir for 6 hours to form a complex sol. The resulting sol Heat to 80°C to evaporate for 4 hours to make it into a gel, dry it under vacuum at 60°C for 10 hours, and grind to obtain a powder sample. Then heat the powder to 350 ° C and burn it completely black, and then bake it at a high temperature of 700 ° C for 3 hours to obtain LaNiO 3 crystals. Finally LaNiO 3 Soak in 0.5mol / L acetic acid for 30min, separate, wash with water, and dry at 70°C for 12 hours to obtain NiO / LaNiO 3 The methane burns completely over the catalyst.

[0019] This catalyst is used in methane complete oxidation experiment, and the result shows that 0.1g catalyst completely oxidizes T to 6% methane 50 (reaction temperature required for 50% conversion) is about 484°C, see Table 1.

[0020] figure 1 The NiO / LaNi...

Embodiment 2

[0022] Under the conditions of stirring and room temperature, lanthanum nitrate, nickel nitrate, and citric acid were dissolved in water or absolute ethanol solution at a molar ratio of 1:1:5, and stirred for 6 hours to form a complex sol. The sol was heated to 80° C. to evaporate for 4 hours to make it into a gel, dried under vacuum at 80° C. for 2 hours, and ground to obtain a powder sample. Then heat the powder to 350 ° C and burn it completely black, and then bake it at a high temperature of 650 ° C for 5 hours to obtain LaNiO 3 crystals. Finally LaNiO 3 Soak in 0.1mol / L acetic acid for 120min, separate, wash with water, and dry at 70°C for 12 hours to obtain NiO / LaNiO 3 The methane burns completely over the catalyst. It is confirmed as LaNiO by XRD spectrum 3 (main phase) and NiO two-phase coexistence structure, NiO in LaNiO 3 Good surface dispersion.

[0023]This catalyst is used in methane complete oxidation experiment, and the result shows that 0.1g catalyst comp...

Embodiment 3

[0025] Under the conditions of stirring and room temperature, lanthanum nitrate, nickel nitrate, and citric acid were dissolved in water or absolute ethanol solution at a molar ratio of 1:1:5, and stirred for 6 hours to form a complex sol. The sol was heated to 100° C. to evaporate for 2 hours to make it into a gel, dried under vacuum at 70° C. for 5 hours, and ground to obtain a powder sample. Then heat the powder to 500 ° C and burn it completely black, and then bake it at a high temperature of 750 ° C for 2 hours to obtain LaNiO 3 crystals. Finally LaNiO 3 Soak in 1mol / L acetic acid for 10min, separate, wash with water, and dry at 60°C for 12 hours to obtain NiO / LaNiO 3 The methane burns completely over the catalyst. It is confirmed as LaNiO by XRD spectrum 3 (main phase) and NiO two-phase coexistence structure, NiO in LaNiO 3 Good surface dispersion.

[0026] This catalyst is used in methane complete oxidation experiment, and the result shows that 0.1g catalyst compl...

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 methane complete combustion catalyst and a preparation method thereof. The catalyst is composed of NiO / LaNiO3, wherein the NiO is generated on the surface of the LaNiO3 in situ. According to the method disclosed by the invention, in-situ acetic acid chemical etching is carried out on the LaNiO3, and part of LaNiO3 is selectively and preferentially removed, so that the surface becomes more coarse and the specific surface area of a sample is enlarged; and finally, the NiO is generated on the surface of the LaNiO3 in situ and a NiO / LaNiO3 compound methane combustion catalytic material is obtained. The method disclosed by the invention has the advantages of simple process, easiness of obtaining the raw materials, low cost and easiness of realizing industrial production; and NiO in the prepared NiO / LaNiO3 methane complete combustion catalyst is obtained by in-situ reaction, so that the dispersity is good, the methane combustion reaction activity is good and the heat resistance is good. The catalyst can also be used for other catalytic reactions of hydrocarbon conversion, such as oxidization reaction of toluene.

Description

technical field [0001] The invention belongs to the technical field of catalytic material preparation, and in particular relates to a methane complete combustion catalyst and a preparation method thereof. Background technique [0002] Natural gas (mainly composed of CH 4 ) is considered to be one of the main energy sources in the 21st century with the advantages of abundant reserves, high thermal efficiency, low price, little pollution, and convenient use. The reaction temperature of the traditional combustion method is too high (up to 1600°C), which will make the N in the air 2 with O 2 react to produce new pollutant NO X , and incomplete combustion of CH 4 will produce CO while CH 4 The greenhouse effect of CO is 2 20 times that of CH 4 (such as the exhaust gas of vehicles fueled by natural gas) is also a serious environmental pollutant. Therefore, the traditional combustion method will cause serious pollution to the environment and aggravate the greenhouse effect ...

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): B01J23/83
CPCB01J23/83B01J35/396
Inventor 聂龙辉
Owner HUBEI UNIV OF TECH
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