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Preparation method of core-shell structure nickel base methane dry reforming catalyst

A methane dry reforming and nickel-based methane technology, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., to achieve the effect of strong resistance to metal agglomeration, improved activity, and easy operation

Active Publication Date: 2017-07-25
SHANGHAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The addition of additives can strengthen the bonding strength between metal nickel nanoparticles and the carrier, and enhance the elimination of carbon deposits, but the agglomeration and sintering of metal nickel nanoparticles cannot be avoided

Method used

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  • Preparation method of core-shell structure nickel base methane dry reforming catalyst

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Embodiment 1

[0021] Weigh 6g of cetyltrimethylammonium bromide, dissolve it in a mixed solution of 80ml of cyclohexane and 15ml of n-butanol, stir, add 4ml of 0.2mol / L nickel nitrate and 0.05mol / L cerium nitrate aqueous solution To the above solution, make it clear, add 0.5ml of hydrazine hydrate and 1.5ml of sodium hydroxide (0.5mol / L) in a water bath at 70°C, and stir for 40 minutes. Then it was lowered to room temperature, and 1ml of ammonia water was added dropwise during vigorous stirring, and then 1ml of tetraethylorthosilicate was slowly added dropwise, stirred for 3 hours, and left to stand for 3 days. Collect by centrifugation, wash with alcohol 5 times to remove excess cetyltrimethylammonium bromide, dry at 120°C, and calcined at 500°C for 2 hours (2°C / min). It is then reduced by using H 2 -TPR, first pass N 2 Pretreated at 300°C for 30 min, cooled to room temperature and treated with H 2 / N 2 Volume ratio 1:9 mixed gas (30mL / min) reduction at 800°C for 1 hour to obtain SiO ...

Embodiment 2

[0024] Weigh 6g of cetyltrimethylammonium bromide, dissolve it in a mixed solution of 80ml of cyclohexane and 15ml of n-butanol, stir, add 4ml of 0.25mol / L nickel nitrate and 0.05mol / L cerium nitrate aqueous solution To the above solution, make it clear, add 0.5ml of hydrazine hydrate and 1.5ml of sodium hydroxide (0.5mol / L) in a water bath at 70°C, and stir for 40 minutes. Then it was lowered to room temperature, and 1 ml of ammonia water was added dropwise during vigorous stirring, and then 1.25 ml of tetraethyl orthosilicate was slowly added dropwise, stirred for 3 hours, and allowed to stand for 3 days. Collect by centrifugation, wash with alcohol 5 times to remove excess cetyltrimethylammonium bromide, dry at 120°C, and calcined at 500°C for 2 hours (2°C / min). It is then reduced by using H 2 -TPR, first pass N 2 Pretreated at 300°C for 30 min, cooled to room temperature and treated with H 2 / N 2 SiO2@NiCe nano-catalysts were obtained by reduction with mixed gas (30mL / ...

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Abstract

The invention discloses a preparation method for core-shell-structured nickel base methane dry reforming catalyst. The methane dry reforming catalyst is coated with a layer of unformed mesoporous silica to form the core shell structure of SiO2@NiCe. The preparation method of the methane dry reforming catalyst comprises the steps that stirring reaction is conducted under a low temperature, and the anti-carbon methane dry reforming catalyst which is good in the anti-sintering performance, high in activity and high in stability is prepared through vacuum drying, high-tempertaure calcination and H2-TPR restoring. The preparation method for the core-shell-structured nickel base methane dry reforming catalyst has the advantages of being simple in preparation technology, comparatively low in cost, free from pollution to the environment, high in catalytic efficiency and the like.

Description

technical field [0001] The invention relates to a preparation method of a nickel-based methane dry reforming catalyst with a core-shell structure, and belongs to the technical fields of nano-catalyst preparation technology and environmental protection. Background technique [0002] In recent years, due to the consumption of non-renewable energy and the deteriorating environment, the development and utilization of natural gas have received more and more attention. There are two main approaches to the development and utilization of natural gas, namely the direct method and the indirect method. The direct method is to pyrolyze or partially oxidize natural gas to produce organic substances such as methanol and formaldehyde. However, this method has certain complexity in the treatment of tail gas and the use of pure oxygen, which limits its industrial application. The indirect method refers to the conversion of natural gas into synthesis gas (H 2 and CO), and then use syngas a...

Claims

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Application Information

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IPC IPC(8): B01J23/83C01B3/34
Inventor 张登松施利毅赵晓元李红蕊张剑平
Owner SHANGHAI UNIV
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