Preparation method of organic-inorganic hybrid material coated nickel silicate nanotube catalyst

A hybrid material, nickel silicate technology, applied in the direction of physical/chemical process catalysts, inorganic chemistry, chemical instruments and methods, etc., can solve the problems of reducing active centers, reducing reactivity, affecting molecular diffusion of reactants and products, etc. Achieve the effects of inhibiting nucleation, improving anti-carbon performance, good stability and anti-carbon performance

Pending Publication Date: 2022-02-18
TIANJIN UNIV
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Problems solved by technology

The sintering of the active components of the nickel-based catalyst reduces the active center of the catalyst and reduces the reaction activity; in addition, the carbon deposits gener

Method used

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  • Preparation method of organic-inorganic hybrid material coated nickel silicate nanotube catalyst
  • Preparation method of organic-inorganic hybrid material coated nickel silicate nanotube catalyst

Examples

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Example Embodiment

[0034] Example 1

[0035] Preparation of nickel silicate nanotubes 40 ml 0.5mol / L sodium silicate solution was poured into 150 ml 0.7mol / L NiCl under stirring 2 · 6h 2 O solution, after 10min, 29g NaOH solution was added in one portion the above mixture, stirred for 10min, seeding of the crystallization vessel 210 ℃ 24h. The obtained precipitate was washed with water and an alcohol washed three times each, and then dried overnight at 60 ℃, to obtain a nickel silicate nanotube precursor.

[0036] Direct synthesis of preparing organic-inorganic hybrid material obtained coated nickel silicate catalysts nanotubes: 0.1g 0.4g nickel silicate nanotubes and hexadecyltrimethylammonium bromide was dispersed in 30ml of deionized water and 90ml of anhydrous mixed solution of ethanol, the ultrasonic 2h. Then, under stirring, 3ml of aqueous ammonia is introduced. 112.5μL 3- aminopropyl triethoxysilane (the APTES) and 187.5μL orthosilicate (TEOS) were mixed in 40ml of absolute ethanol, was ad...

Example Embodiment

[0039] Example 2

[0040] Preparation of nickel silicate nanotubes: 40 ml 0.5mol / L sodium silicate solution was poured into 150 ml 0.7mol / L NiCl under stirring 2 · 6h 2 O solution, after 10min, 29g NaOH solution was rapidly added into the above mixture, stirred for 10min, seeding of the crystallization vessel 210 ℃ 24h. The obtained precipitate was washed with water and an alcohol washed three times each, and then dried overnight at 60 ℃, to obtain a nickel silicate nanotube precursor.

[0041] After synthesis of the synthetic organic-inorganic hybrid material coated with nickel silicate catalysts nanotubes, 0.1g and 0.4g of nickel silicate nanotubes hexadecyltrimethylammonium bromide was dispersed in 30ml of deionized water and 90ml of absolute ethanol a mixed solution, ultrasonic 2h. Then, under stirring, 3ml of aqueous ammonia is introduced. 112.5μL TEOS were mixed in 25ml of anhydrous ethanol, was added dropwise the above mixed suspension; Subsequently, 187.5μL3- aminoprop...

Example Embodiment

[0043] Example 3

[0044] The other steps are the same as Embodiment Example 1, changing the addition amount of APTES 75μL, TEOS is added in an amount 225 L, methane conversion activity evaluation after 60h, decreased to 72%, resulting in 1.51% of carbon.

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Abstract

The invention relates to a preparation method of an organic-inorganic hybrid material coated nickel silicate nanotube catalyst. According to the method, a modified Stober method is used, and a nickel silicate nanotube coated with an amino-functionalized organic-inorganic hybrid material is realized at normal temperature in one step, namely, an inorganic silicon source tetraethoxysilane (TEOS) is added, and meanwhile, an amino-carrying organic silicon source 3-aminopropyltriethoxysilane (APTES) is added; nickel nanoparticles with small sizes are obtained and are limited in a coating structure, and amino modification has a coordination effect, so that the catalyst sintering resistance is improved. The obtained organic-inorganic hybrid material coated nickel silicate nanotube catalyst has excellent catalytic performance, the sintering resistance and the carbon deposition resistance of the catalyst are improved, and a coupling enhancement effect is generated.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation and environmental protection, and in particular relates to a preparation method of an organic-inorganic hybrid material-coated nickel silicate nanotube catalyst. Background technique [0002] In recent years, with the advancement and development of science and technology, the demand for fossil fuels has been increasing. Due to the burning of a large amount of fossil fuels, the content of carbon dioxide in the atmosphere has increased year by year, which has led to the intensification of the greenhouse effect. But besides being a greenhouse gas, carbon dioxide itself is also a valuable resource, so more and more scientists hope to seek a breakthrough in the utilization of carbon dioxide. At the same time, with the over-exploitation of oil resources, its reserves are becoming increasingly scarce. Natural gas, which is one of the three major fossil energy sources but has not been fully e...

Claims

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Application Information

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IPC IPC(8): B01J27/24C01B3/40C01B32/40
CPCB01J27/24C01B3/40C01B32/40Y02P20/52
Inventor 马新宾王胜平吕静李茂帅郭丹
Owner TIANJIN UNIV
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