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Preparation method of Ni@SiO2@CeO2 core-shell nanosphere catalyst and application thereof in methane carbon dioxide reforming reaction

A technology of core-shell catalysts and surfactants, which is applied in the fields of energy utilization and the environment, can solve the problems of reduced catalyst activity and no reports on low-temperature catalyst performance, and achieve high conversion rates

Inactive Publication Date: 2019-03-29
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Chinese patent CN201510244448 reports a Ni-based catalyst with oxide SiO 2 Coating the active component Ni inhibits the sintering caused by the movement and aggregation of Ni nanoparticles under high temperature conditions, but the catalyst activity decreases significantly after the catalyst reacts at 750°C for several hours, indicating that SiO 2 The active component nickel still sintered under the coating, and the low-temperature catalyst performance has not been reported

Method used

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  • Preparation method of Ni@SiO2@CeO2 core-shell nanosphere catalyst and application thereof in methane carbon dioxide reforming reaction
  • Preparation method of Ni@SiO2@CeO2 core-shell nanosphere catalyst and application thereof in methane carbon dioxide reforming reaction
  • Preparation method of Ni@SiO2@CeO2 core-shell nanosphere catalyst and application thereof in methane carbon dioxide reforming reaction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] a. Mix 5.62 grams of polyoxyethylene alkyl ethers (n=20) and 15 ml of cyclohexane at room temperature to form a white emulsion, and add 0.5 ml of Ni(NO 3 ) 3 ·6H 2 O (1mol / L), stirred at room temperature for 30 minutes to form a light green emulsion.

[0034] b. Put the light green milk in a in a water bath at 50°C and stir for 5-10 minutes to form a light green solution. Slowly add 0.6ml of hydrazine hydrate dropwise to the light green solution and stir for 20 minutes to form a purple solution.

[0035] c. Slowly add 2.1ml of tetraethyl orthosilicate dropwise to the purple solution in c, stir for 10 minutes while adding dropwise, and slowly add 1.5ml of ammonia water for hydrolysis for 1 hour.

[0036] d. Then add isopropanol to terminate the reaction, wash the sample four times at a centrifugal speed of 8000 rpm with isopropanol, then place it in a 60°C oven and dry it for 12 hours to obtain [Ni(N 2 h 4 ) 3 ](NO 3 ) 2 @SiO 2 Precursor. [Ni(N 2 h 4 ) 3 ](NO...

Embodiment 2

[0052] a. Mix 5.62 grams of polyoxyethylene alkyl ethers (n=20) and 15 ml of cyclohexane at room temperature to form a white emulsion, and add 0.5 ml of Ni(NO 3 ) 3 ·6H 2 O (0.3mol / L), stirred at room temperature for 30 minutes to form a light green emulsion.

[0053] b. Put the light green milk in a in a water bath at 50°C and stir for 5-10 minutes to form a light green solution. Slowly add 0.6ml of hydrazine hydrate dropwise to the light green solution and stir for 20 minutes to form a purple solution.

[0054] c. Slowly add 2.1ml of tetraethyl orthosilicate dropwise to the purple solution in c, stir for 10 minutes while adding dropwise, and slowly add 1.5ml of ammonia water for hydrolysis for 1 hour.

[0055] d. Then add isopropanol to terminate the reaction, wash the sample four times at a centrifugal speed of 8000 rpm with isopropanol, then place it in a 60°C oven and dry it for 12 hours to obtain [Ni(N 2 h 4 ) 3 ](NO 3 ) 2 @SiO 2 Precursor. [Ni(N 2 h 4 ) 3 ](...

Embodiment 3

[0062] a. Mix 5.62 grams of polyoxyethylene alkyl ethers (n=20) and 15 ml of cyclohexane at room temperature to form a white emulsion, and add 0.5 ml of Ni(NO 3 ) 3 ·6H 2 O (1mol / L), stirred at room temperature for 30 minutes to form a light green emulsion.

[0063] b. Put the light green milk in a in a water bath at 50°C and stir for 5-10 minutes to form a light green solution. Slowly add 0.6ml of hydrazine hydrate dropwise to the light green solution and stir for 20 minutes to form a purple solution.

[0064] c. Slowly add 2.1ml of tetraethyl orthosilicate dropwise to the purple solution in c, stir for 10 minutes while adding dropwise, and slowly add 1.5ml of ammonia water for hydrolysis for 1 hour.

[0065] d. Then add isopropanol to terminate the reaction, wash the sample four times at a centrifugal speed of 8000 rpm with isopropanol, then place it in a 60°C oven and dry it for 12 hours to obtain [Ni(N 2 h 4 ) 3 ](NO 3 ) 2 @SiO 2 Precursor. [Ni(N 2 h 4 ) 3 ](NO...

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Abstract

The invention belongs to the technical field of energy utilization and environment, and relates to a preparation method of a Ni@SiO2@CeO2 core-shell nanosphere catalyst and an application thereof in methane carbon dioxide reforming reaction. The Ni@SiO2@CeO2 core-shell nanosphere catalyst is obtained through a series of reaction of a nickel source solution, a surfactant, hydrazine hydrate, tetraethyl orthosilicate, ammonia water and cerium nitrate hexahydrate aqueous solution. The catalyst prepared by the invention is used in methane carbon dioxide reforming reaction, when the catalytic temperature is 600 DEG C, the conversion rate of methane is 35-40%, and the conversion rate of carbon dioxide is 50-54%.

Description

technical field [0001] The invention belongs to the technical field of energy utilization and environment, and relates to a Ni@SiO 2 @CeO 2 A preparation method of a core-shell nanosphere catalyst and its application in methane carbon dioxide reforming reaction. Background technique [0002] With the rapid development of the global economy and the continuous increase of population, the environment on which human beings live is also deteriorating. Among them, the issue of global warming has always attracted people's attention, and the main causes of its occurrence are carbon dioxide and methane. emissions of this major greenhouse gas. The carbon dioxide reforming reaction of methane can realize the simultaneous conversion of two greenhouse gases, methane and carbon dioxide, and its product synthesis gas can be used to produce energy chemicals such as low-carbon alkanes, methane, gasoline and diesel through Fischer-Tropsch synthesis. Therefore, exploring and developing new ...

Claims

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Application Information

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IPC IPC(8): B01J23/83B01J35/08B01J37/03B01J37/18C01B3/40
CPCC01B3/40B01J23/002B01J23/83B01J37/033B01J37/18C01B2203/0238C01B2203/1058B01J35/23B01J35/398B01J35/51Y02P20/52
Inventor 韩柏林王发根张林佳
Owner JIANGSU UNIV
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