Preparation, product and application of high temperature stable supported cobalt tetroxide catalyst based on strong interaction between metal and support

A kind of cobalt tetroxide catalyst, high temperature stable technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, catalyst activation/preparation, physical/chemical process catalyst, etc. Application prospect, effect of good high temperature stability

Active Publication Date: 2020-06-19
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, γ-Al 2 o 3 with Co 3 o 4 Inert cobalt aluminate compounds are formed under high temperature conditions, which will reduce the activity of the catalyst

Method used

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  • Preparation, product and application of high temperature stable supported cobalt tetroxide catalyst based on strong interaction between metal and support

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] S1. Weigh 4.341g of cerium nitrate, 4.293g of zirconium nitrate, and 1.875g of aluminum nitrate into a beaker, add 100ml of deionized aqueous solution, stir to dissolve completely.

[0024] S2. Slowly add 1 mol / L sodium carbonate solution to the above solution, adjust the pH to 9, and keep stirring for at least 15 minutes during the process. After the solution is mixed, shake it ultrasonically for 15-30 minutes to make it disperse evenly.

[0025] S3. The obtained product is filtered, washed, freeze-dried, and calcined at 800° C. for 3 hours to obtain a light yellow powdery cerium-zirconium-aluminum solid solution.

[0026] S4. Weigh 0.5455g of cobalt nitrate and 1.5g of cerium-zirconium-aluminum solid solution into a beaker, add 100ml of deionized aqueous solution, and stir to dissolve the cobalt nitrate completely.

[0027] S5. Slowly add 1 mol / L sodium carbonate solution to the suspension, adjust the pH to 9, and keep stirring for at least 15 minutes during the proc...

Embodiment 2

[0030] S1. Weigh 4.341g of cerium nitrate, 4.293g of zirconium nitrate, and 3.75g of aluminum nitrate into a beaker, add 100ml of deionized aqueous solution, stir to dissolve completely.

[0031] S2. Slowly add 1 mol / L sodium carbonate solution to the above solution, adjust the pH to 9, and keep stirring for at least 15 minutes during the process. After the solution is mixed, shake it ultrasonically for 15-30 minutes to make it disperse evenly.

[0032] S3. The obtained product is filtered, washed, freeze-dried, and calcined at 800° C. for 3 hours to obtain a light yellow powdery cerium-zirconium-aluminum solid solution.

[0033] S4. Weigh 0.5455g of cobalt nitrate and 1.5g of cerium-zirconium-aluminum solid solution into a beaker, add 100ml of deionized aqueous solution, and stir to dissolve the cobalt nitrate completely.

[0034] S5. Slowly add 1 mol / L sodium carbonate solution to the suspension, adjust the pH to 9, and keep stirring for at least 15 minutes during the proce...

Embodiment 3

[0037]S1. Weigh 4.341g of cerium nitrate, 4.293g of zirconium nitrate, and 5.625g of aluminum nitrate into a beaker, add 100ml of deionized aqueous solution, stir to dissolve completely.

[0038] S2. Slowly add 1 mol / L sodium carbonate solution to the above solution, adjust the pH to 9, and keep stirring for at least 15 minutes during the process. After the solution is mixed, shake it ultrasonically for 15-30 minutes to make it disperse evenly.

[0039] S3. The obtained product is filtered, washed, freeze-dried, and calcined at 800° C. for 3 hours to obtain a light yellow powdery cerium-zirconium-aluminum solid solution.

[0040] S4. Weigh 0.5455g of cobalt nitrate and 1.5g of cerium-zirconium-aluminum solid solution into a beaker, add 100ml of deionized aqueous solution, and stir to dissolve the cobalt nitrate completely.

[0041] S5. Slowly add 1 mol / L sodium carbonate solution to the suspension, adjust the pH to 9, and keep stirring for at least 15 minutes during the proce...

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Abstract

The invention discloses preparation of high temperature stability supported cobaltosic oxide based on strong metal and carrier interaction, a product and application. The preparation comprises the following steps: using cobalt nitrate as a cobalt source, sodium carbonate as a precipitator and a cerium-zirconium-aluminum solid solution as a carrier, and using a deposition precipitation method to prepare supported Co3O4; putting cobalt nitrate and the cerium-zirconium-aluminum solid solution into a flask, adding a deionized water soluition, stirring to completely dissolve cobalt nitrate, slowlyadding the sodium carbonate solution into suspension liquid, adjusting the pH to be 9, stirring to carry out ultrasonic oscillation, carrying out filtering, washing and frozen drying on the obtained product, and carrying out calcination at the temperature of 800 DEG C for 3 h to obtain a powdery Co3O4 / CeZrAlO material. After high-temperature processing of 800 DEG C, the catalyst is applied to a propane catalytic combustion reaction, and is still of extremely high activity. The raw materials of the catalyst disclosed by the invention are easily obtained, the technology is simple, the catalyst is high in high temperature stability, and the catalyst has excellent application prospects.

Description

technical field [0001] The invention relates to the field of preparation of nanomaterials, in particular to a preparation method, product and application of a high-temperature stable loaded tricobalt tetroxide catalyst based on the strong interaction between metal and carrier. Background technique [0002] Hydrocarbons (HC) are one of the main pollution sources of urban air. Most HCs are toxic, and some HCs are even potential carcinogens, seriously endangering the environment and human health. In addition, the photochemical reaction between HC and NOx may lead to photochemical smog pollution, which will have a more serious impact on human health and the ecological environment. Catalytic combustion, the products are carbon dioxide and water, no secondary pollution, it is an ideal method to control HC pollution. [0003] Low-chain HC has the characteristics of non-polarity and chemical stability, and the catalytic combustion reaction can only occur at high temperature. There...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/83B01J37/03F23G7/07
CPCB01J23/002B01J23/83B01J37/035B01J2523/00F23G7/07B01J2523/31B01J2523/3712B01J2523/48B01J2523/845
Inventor 何丹农赵昆峰张林蔡婷肖蓓杨玲袁静金彩虹
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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