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Catalyst for methane carbon dioxide dry reforming reaction and its preparation method and application

A carbon dioxide and catalyst technology, applied in the field of Ni-MO@Silicalite-1 catalyst and its preparation

Active Publication Date: 2021-06-04
DALIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] So far, in any previous literature, there is no fluorine-free raw material to prepare Silicalite-1 molecular sieve crystal multi-cavity package nano-Ni particles to make the content of Ni in the catalyst reach more than 7.5wt.%, which is used for carbon dioxide dry reforming of methane Response study

Method used

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  • Catalyst for methane carbon dioxide dry reforming reaction and its preparation method and application
  • Catalyst for methane carbon dioxide dry reforming reaction and its preparation method and application
  • Catalyst for methane carbon dioxide dry reforming reaction and its preparation method and application

Examples

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Effect test

preparation example Construction

[0033]Preparation of Silicalite-1 molecular sieve:

[0034] 45.83g of ethyl orthosilicate, 48.32g of tetrapropylammonium hydroxide (25wt.%), 40.54g of absolute ethanol and 145.92g of deionized water were uniformly mixed and stirred at 25°C for 5 hours. The resulting mixed liquid was poured into a hydrothermal kettle for hydrothermal crystallization at 170° C. for 72 hours. The resulting solid was dried by centrifugation and calcined in air at 540°C for 4 hours to obtain the Silicalite-1 parent molecular sieve.

Embodiment 1

[0036] 7.69g Ni(NO 3 ) 2 ·6H 2 O was dissolved in 12 mL of deionized water. Then 6 grams of Silicalite-1 parent molecular sieve obtained by the above-mentioned Silicalite-1 molecular sieve preparation method was added thereto, stirred at 50° C. until dry, and ground into powder. Then the obtained powder was mixed with 58.6g of tetrapropylammonium hydroxide with a concentration of 25wt.% and 181.4g of deionized water, and poured into a hydrothermal kettle for hydrothermal crystallization at 170°C for 72 hours. After centrifugation, the resulting solid was dried and calcined in air at 540°C for 4 hours.

Embodiment 2

[0038] With 5.43g Ni(NO 3 ) 2 ·6H 2 O replaces 7.69g Ni(NO 3 ) 2 ·6H 2 O was dissolved in 12 milliliters of deionized water, and other treatments were the same as in Example 1.

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Abstract

The invention discloses a Ni@Silicalite-1 catalyst used for efficiently catalyzing the carbon dioxide reforming reaction of methane and a fluorine-free preparation method thereof, belonging to the technical field of catalyst preparation. The basic structural feature of the catalyst is that high content (7.5wt.%-20wt.%) Ni is highly dispersed and embedded in Silicalite-1 molecular sieve crystals. The preparation method of the catalyst does not involve any fluoride raw materials. Although the catalyst has a high Ni content, it has extremely strong anti-sintering and anti-coking properties due to the confinement effect of the Silicalite-1 molecular sieve framework on Ni metal particles. Due to the high content of Ni and the mass transfer effect of the micropores of Silicalite-1 molecular sieve, the catalyst has the same catalytic activity and stability as the previous amorphous SiO 2 The embedded Ni nanoparticle catalyst is also outstanding in comparison.

Description

technical field [0001] The invention relates to a Ni-MO@Silicalite-1 catalyst for efficiently catalyzing the carbon dioxide reforming reaction of methane and a preparation method thereof, belonging to the technical field of catalyst preparation. Background technique [0002] Natural gas is one of the three most important fossil energy sources. With the continuous exploration of terrestrial natural gas resources and seabed combustible ice resources, the importance of effective utilization of natural gas energy has become increasingly prominent worldwide. Methane is the main component of natural gas, its molecules are very stable and difficult to be activated at lower temperatures, at the same time, in the presence of O 2 Combustion reaction is very easy to occur under the existing conditions, which makes the effective conversion and utilization of methane internationally recognized as the core topic of today's energy research. [0003] On the other hand, as the final combus...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/03C01B3/40
CPCB01J29/0316C01B3/40Y02P20/52
Inventor 王新平石川陈勇刘洋
Owner DALIAN UNIV OF TECH
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