Preparation method of small-grain-size cobalt-based aluminum oxide catalyst

A technology based on alumina and catalysts, applied in catalyst activation/preparation, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., to facilitate material diffusion and heat transfer, simple operation, and pore channels orderly effect

Inactive Publication Date: 2019-04-19
FUJIAN NORMAL UNIV
View PDF3 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In view of the relatively large particles of cobalt tetroxide in the existing cobalt-based alumina catalyst, the inactive phase CoAl is easily formed when the catalyst is calcined

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
  • Preparation method of small-grain-size cobalt-based aluminum oxide catalyst
  • Preparation method of small-grain-size cobalt-based aluminum oxide catalyst
  • Preparation method of small-grain-size cobalt-based aluminum oxide catalyst

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0035] Example 1:

[0036] 1) Dissolve 1g P123 into a mixed solution consisting of 20ml absolute ethanol, 0.8ml hydrochloric acid (37wt%) and 0.1ml interface protective agent acetic acid;

[0037] 2) Dissolve 2.04 g of aluminum isopropoxide into the mixed solution of step 1) and stir for 5 hours until the mixing is uniform to form a sol, and the final pH of the sol is 2.0;

[0038] 3) The sol obtained in step 2) is aged at 30°C for 10 hours and dried at 100°C to obtain a dry gel;

[0039] 4) The dry gel obtained in step 3) is calcined from room temperature at a heating rate of 1°C / min to 500°C for 4 hours, and then at a heating rate of 10°C / min to 800°C for 1 hour to prepare ordered mesoporous alumina Carrier

[0040] 5) Immerse the alumina carrier obtained in the above steps into a mixed solution consisting of deionized water, diethylene glycol and cobalt acetate, wherein the molar ratio of diethylene glycol, alumina and cobalt acetate tetrahydrate is 1:5:2, Then, it was immersed at ...

Example Embodiment

[0041] Example 2:

[0042] 1) Dissolve 1g P123 into a mixed solution consisting of 20ml absolute ethanol, 0.8ml hydrochloric acid (37wt%) and 0.1ml interface protective agent acetic acid;

[0043] 2) Dissolve 2.04 g of aluminum isopropoxide into the mixed solution of step 1) and stir for 5 hours until the mixing is uniform to form a sol, and the final pH of the sol is 2.0;

[0044] 3) The sol obtained in step 2) is aged at 30°C for 10 hours and dried at 100°C to obtain a dry gel;

[0045] 4) The dry gel obtained in step 3) is calcined at a temperature rise rate of 1°C / min to 500°C for 4 hours, and then a temperature rise rate of 10°C / min to 800°C for 1 hour to prepare an alumina carrier;

[0046] 5) Immerse the alumina support obtained in step 4) into a mixed solution composed of deionized water, diethylene glycol and cobalt acetate, wherein the molar ratio of diethylene glycol, alumina and cobalt acetate tetrahydrate is 3:5:2 Then, it was immersed at room temperature for 5 hours, drie...

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

PropertyMeasurementUnit
Particle sizeaaaaaaaaaa
The average particle sizeaaaaaaaaaa
The average particle sizeaaaaaaaaaa
Login to view more

Abstract

The invention discloses a preparation method of a small-grain-size cobalt-based aluminum oxide catalyst. The method comprises the steps that by adopting a sol-gel method, hydrochloric acid is adoptedas an acidity regulator, acetic acid is adopted as an interface protective agent to synthesize an alumna supporter, then, cobaltous acetate is adopted as a cobalt source, diglycol is adopted as a complexing agent, and a dipping method is adopted for manufacturing the small-grain-size cobalt-based aluminum oxide catalyst. Compared with existing cobalt-based aluminum oxide synthesized by adopting glycine and urea as complexing agents, the grain size of cobaltosic oxide in synthesized cobalt-based aluminum oxide is smaller, the number of catalyst surface active loci is increased, and the interaction strength between the supporter and active ingredients is enhanced. In addition, the cobalt-based aluminum oxide is good in thermal stability, generation of a CoAl2O4 non-active phase can be restrained within the certain temperature range, and the activity of the catalyst in the methane catalyst combustion reaction is improved. The method is easy to implement, the synthesized cobalt-based aluminum oxide can be adopted as a catalyst carrier and can also be adopted as a catalyst obtained after a methane catalysis combustion reaction, and the good application prospect is achieved.

Description

technical field [0001] The invention belongs to the technical field of preparation of catalytic materials, and in particular relates to a preparation method of a cobalt-based alumina catalyst with a small particle size. Background technique [0002] Natural gas reserves are abundant, and as a high-quality alternative energy source, it can be used in gas-fired power plants and as a power fuel for natural gas vehicles. The main component of natural gas is methane, and the emission of incompletely burned methane into the atmosphere during use will cause serious greenhouse effects, so effective purification measures need to be taken. Catalytic combustion of methane is considered to be an effective way to reduce the emission of incompletely combusted methane. The catalysts currently used are mainly divided into two categories: noble metal catalysts and non-precious metal catalysts. Although noble metal-based catalysts, especially supported Pd-based catalysts, have high methane c...

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): B01J23/75B01J37/02B01J37/08F23G7/07B82Y30/00B82Y40/00
CPCB01J23/75B01J35/0013B01J37/0201B01J37/082B82Y30/00B82Y40/00F23G7/07
Inventor 柳晓杰林佳胡阿辉陈烨琳郑瑛
Owner FUJIAN NORMAL UNIV
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