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Cobalt oxide or cobalt oxide doped nickel oxide catalyst and preparation method and application thereof

A cobalt oxide and catalyst technology, applied in the field of cobalt oxide or cobalt oxide doped nickel oxide catalyst and its preparation, can solve the problem of high temperature

Pending Publication Date: 2020-07-03
HEFEI ENERGY RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing catalysts for the catalytic oxidation of alkanes and aromatic hydrocarbons require a higher temperature for catalytic oxidation of hydrocarbons

Method used

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  • Cobalt oxide or cobalt oxide doped nickel oxide catalyst and preparation method and application thereof
  • Cobalt oxide or cobalt oxide doped nickel oxide catalyst and preparation method and application thereof
  • Cobalt oxide or cobalt oxide doped nickel oxide catalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] The preparation of cobalt oxide nanosheet catalyst comprises the following steps:

[0055] (1) Take 350mL of ammonia water and add it to a 10L beaker, add deionized water until the volume of the solution is 8L, and prepare a 0.5mol / L ammonia solution;

[0056] (2) Add 1164g of cobalt nitrate hexahydrate powder into a reaction tank filled with 1000 mL of deionized water, and stir for 60 minutes to completely dissolve the powder to form a cobalt nitrate hexahydrate solution;

[0057] (3) Add the aqueous ammonia solution dropwise to the cobalt nitrate hexahydrate solution in step (2), measure the pH value of the solution while dropping, when the pH is equal to 9, stop dripping the aqueous ammonia, and stir at 1000rpm for 6h at room temperature ;

[0058] (4) Use the solution obtained by suction filtration with a suction filter to obtain wet powder particles, use deionized water and suction filter to continue washing the wet powder particles until the pH of the washed liqu...

Embodiment 2

[0062] Cobalt oxide doped nickel oxide catalyst, the content of nickel precursor and final nickel oxide is selected as 25%, that is, the mass ratio of nickel precursor to cobalt and nickel precursor mixture is 1:4, and its preparation method includes the following steps:

[0063] (1) Take 350mL of ammonia water and add it to a 10L beaker, add deionized water until the volume of the solution is 8L, and prepare 0.5mol / L ammonia water;

[0064] (2) Add 873g of cobalt nitrate hexahydrate powder and 291g of nickel nitrate hexahydrate powder into a reaction tank containing 1000mL of deionized water, stir for 60min to completely dissolve the powder, and form a mixed solution of cobalt-nickel precursor;

[0065] (3) Add ammoniacal liquor dropwise to the cobalt nitrate hexahydrate solution in step (2), measure the pH value of the solution while dropping, when the pH is equal to 9, stop dripping ammoniacal liquor, and stir at 1000rpm at room temperature for 6h;

[0066] (4) Use the solu...

Embodiment 3

[0070] Preparation of cobalt oxide doped nickel oxide catalyst

[0071] The difference between this embodiment and Example 2 is that the content of the nickel precursor and the final nickel oxide is selected as 50%, and 776g of cobalt nitrate hexahydrate powder and 388g of nickel nitrate hexahydrate powder are added to a container filled with 1000ml of deionized water. In the reaction barrel, stir for 60 minutes to completely dissolve the powder to form a mixed solution of the cobalt-nickel precursor, and the rest of the steps are the same as in Example 2.

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Abstract

The invention discloses a cobalt oxide or cobalt oxide doped nickel oxide catalyst, and relates to the technical field of catalysts, the cobalt oxide or cobalt oxide doped nickel oxide catalyst is ofa nanosheet structure and has a porous structure, and the surface of the cobalt oxide or cobalt oxide doped nickel oxide catalyst has hydroxyl. The invention also provides a preparation method of thecatalyst. The invention also discloses an application of the catalyst in catalytic combustion of alkane or aromatic hydrocarbon. The surface of the catalyst provided by the invention has a lot of hydroxyl groups, hydroxyl is an important active site in the catalytic oxidation process of alkane or aromatic hydrocarbon, combustion of low-concentration alkane or aromatic hydrocarbon can be catalyzedat the low temperature, alkane or aromatic hydrocarbon is completely converted into carbon dioxide and water, and the performance of the cobalt oxide doped nickel oxide catalyst is similar to that ofa cobalt oxide catalyst.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to a cobalt oxide or cobalt oxide-doped nickel oxide catalyst and a preparation method and application thereof. Background technique [0002] Hydrocarbons such as hydrocarbons and aromatic hydrocarbons in the atmosphere are the main components of volatile organic compounds. VOC has a wide range of emission sources for volatile organic compounds, but it is well known that alkanes and aromatics are relatively difficult to destroy. With the increasingly stringent environmental protection regulations in various countries, the purification of hydrocarbons in the atmosphere is facing greater challenges. Catalytic oxidation technology is considered one of the best ways to reduce VOC emissions due to its potential to effectively break down pollutants into carbon dioxide and water. Therefore, the use of catalytic oxidation technology to effectively treat low-concentration hydrocarbons in...

Claims

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Application Information

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IPC IPC(8): B01J23/75B01J23/755B01J35/10F23G7/07
CPCB01J23/75B01J23/755B01J23/002F23G7/07F23G2209/14F23G2209/10B01J35/23B01J35/613
Inventor 李文志陈锟
Owner HEFEI ENERGY RES INST