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Catalyst carrier, supported catalyst, preparation method and application thereof
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A kind of supported catalyst, catalyst technology
Active Publication Date: 2020-12-15
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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[0005] The purpose of the present invention is to provide a simple method for preparing boron-doped carbon materials, and use the prepared materials as the carrier of metal nanoparticles to solve the problem of the interaction between carbon materials and the loaded metal nanoparticles. Weak, the problem that metal nanoparticles are easy to aggregate and fall off in heterogeneous catalytic reactions
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Embodiment 1
[0047] Vector preparation:
[0048] (1) Weigh 3.0 g of glucose and 1.6 g of boric acid, dissolve them in deionized water, and stir at room temperature for 8 hours.
[0049] (2) Continue to stir the above solution in a 60°C oil bath to make it dry.
[0050] (3) Transfer the dried sample to a tube furnace, heat up to 300°C at 5°C / min under an argonatmosphere, and bake at an argon flow rate of 100mL / min for 1h, then raise the temperature at 5°C / min under an argonatmosphere To 800°C, the argon flow rate is 100mL / min, roast for 2h, and then lower the temperature.
[0051] (4) Grinding the calcined product into fine powder in a mortar, washing with hot water three times in a sand core funnel, washing once with absolute ethanol, and drying in an oven to obtain a carrier.
[0052] TEM characterization to obtain the morphology of the catalyst support, such as figure 1 , indicating that the carrier is composed of sheet-like structures. Raman results showed that the catalyst suppor...
Embodiment 2
[0059] Vector preparation:
[0060] (1) Weigh 3.0 g of glucose and 3.2 g of boric acid, dissolve them in deionized water, and stir at room temperature for 8 hours.
[0061] (2) Continue to stir the above solution in a 60°C oil bath to make it dry.
[0062] (3) Transfer the dried sample to a tube furnace, heat up to 300°C at 5°C / min under an argon atmosphere, and bake at an argon flow rate of 100mL / min for 1h, then raise the temperature at 5°C / min under an argon atmosphere To 900°C, the argon flow rate is 100mL / min, roast for 2h, and then lower the temperature.
[0063] (4) Grinding the calcined product into fine powder in a mortar, washing with hot water three times in a sand core funnel, washing once with absolute ethanol, and drying in an oven to obtain a carrier.
[0064] The obtained catalyst support is composed of flake-shaped amorphous carbon material modified with boron and oxygen elements, wherein the boron element is represented by BC 3 、BCO 2 and BC 2 The form o...
Embodiment 3
[0070] Vector preparation:
[0071] (1) Weigh 3.0 g of glucose and 3.2 g of boric acid, dissolve them in deionized water, and stir at room temperature for 8 hours.
[0072] (2) Continue to stir the above solution in a 60°C oil bath to make it dry.
[0073] (3) Transfer the dried sample to a tube furnace, heat up to 300°C at 5°C / min under an argon atmosphere, and bake at an argon flow rate of 100mL / min for 1h, then raise the temperature at 5°C / min under an argon atmosphere To 1000°C, the argon flow rate is 100mL / min, roast for 2h, and then lower the temperature.
[0074] (4) Grinding the calcined product into fine powder in a mortar, washing with hot water three times in a sand core funnel, washing once with absolute ethanol, and drying in an oven to obtain a carrier.
[0075] The obtained catalyst support is composed of flake-shaped amorphous carbon material modified with boron and oxygen elements, wherein the boron element is represented by BC 3 、BCO 2 and BC 2 The form ...
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Abstract
The invention relates to a catalyst carrier, a supported catalyst and a preparation method and use thereof. It mainly solves the problem that the interaction force between the carbon material and the supported metal nanoparticles is weak and the metal nanoparticles are easily formed during the heterogeneous catalytic reaction process. Problems with gathering, growing and falling off. The present invention uses biomass sugars and boron-containing compounds as precursors, and obtains boron-doped carbon materials through high-temperature roasting, which better solves the above problems. There is a strong interaction between the doped carbon material and metal nanoparticles. When used as a carrier to load metal nanoparticles, it can uniformly disperse the metal nanoparticles and effectively curb the aggregation and shedding of metal nanoparticles during the catalytic reaction process, which significantly Improve the activity and stability of the catalyst. The doped carbon material has a wide range of raw materials, is cheap and easy to obtain, and has a simple preparation process. As an ideal metal nanoparticlecarrier material, it has good application prospects.
Description
technical field [0001] The invention relates to a catalyst carrier, a supported catalyst, a preparation method and application thereof. Background technique [0002] Compared with non-supported metal catalysts, supported metal catalysts are widely used because they can greatly increase catalyst activity, improve catalyst selectivity, reduce catalyst cost, easy separation of catalyst and reaction products, and easy recovery and reuse of active components. Petrochemical, energy conversion, environmental protection, etc. Commonly used catalyst supports include: metal oxide supports, carbon material supports, molecular sieve supports, and some natural substances such as zeolite, diatomaceous earth, etc. Among them, carbon materials have become one of the earliest materials used as metal catalyst supports because of their developed pore structure, high specific surface area, excellent acid and alkali resistance, high thermal conductivity, and low cost, and have always been favor...
Claims
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Application Information
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