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Preparation method and application of Pt nanoparticle-loaded biochar catalyst

A nanoparticle, biochar technology, applied in catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., to achieve the effect of simple operation, low price, and reduction of the use of fossil resources

Active Publication Date: 2021-01-29
DALIAN MARITIME UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the research on biochar is in adsorbents for adsorbing water and air, removing tar or implanting acidic sites for acidic catalysts, while there are few reports on using biochar as a carrier.

Method used

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  • Preparation method and application of Pt nanoparticle-loaded biochar catalyst
  • Preparation method and application of Pt nanoparticle-loaded biochar catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Biomass pretreatment

[0035] The rice husks from Heilongjiang Province, China are washed and dried, and the rice husks are crushed with a grinder.

[0036] (2) Preparation of biochar

[0037] Put into the pyrolysis reactor, the volume of the reactor is 0.8L. Then it was raised from room temperature to 100°C at a rate of 7°C / min and kept for 6-8min. Then the temperature was raised to 550°C at a speed of 37°C / min, and the carbonization was continued for 30 minutes, and the obtained biochar was pulverized, and then the biochar with a particle size of less than 0.3 mm was screened out through a vibrating sieve machine.

[0038] (3) Loading of Pt nanoparticles

[0039] 0.1g of H 2 PtCI 6 ·6H 2 O was dissolved in 80 mL of deionized water, then 0.5 g of biochar was added, impregnated, and then stirred at 70 °C until the deionized water was evaporated to dryness;

[0040] The resulting product was washed 3 times with ethanol, dried in an oven at 60°C for 12 hours, t...

Embodiment 2

[0044] The Pt / BC (Pt loading 2.6%) prepared in Example 1 was used as a catalyst for the hydrogenation of 5-hydroxymethylfurfural to prepare 2,5-dimethylolfuran.

[0045] Preparation conditions: hydrogen pressure 1-3MPa; temperature 140-180°C; reaction time 10h; n-butanol as solvent.

[0046] Concrete preparation steps are as follows:

[0047] (1) Add 0.5gHMF and 30mL n-butanol into a stainless steel reactor, then add 0.05gPt / BC catalyst;

[0048] (2) The reactor is filled with H 2 Pressurize to 1MPa, and open the valve to ventilate to decompress the reactor to atmospheric pressure, repeat this process 10 times, to ensure that 99.99% of the air in the reactor is covered by H 2 Instead, the reactor was then pressurized with 1 MPa of hydrogen, the temperature was raised to 160 °C, and stirred at a rate of 500 rpm to fully mix the reactants with the catalyst.

[0049] Product analysis: Analysis was performed according to an internal standard (n-tridecane) using a gas chromatogr...

Embodiment 3

[0051]In this example, the difference from Example 2 is that the reaction temperature is 180° C., and the rest of the content is the same as that of Example 2.

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Abstract

The invention relates to a preparation method and application of a Pt nanoparticle-loaded biochar catalyst, and belongs to the technical field of catalysts. According to the catalyst, biochar is takenas a carrier, and Pt nanoparticles are loaded; Pt nanoparticles are used as active sites, the loading capacity of the Pt nanoparticles is 1-10wt.%, and the particle size of the Pt nanoparticles is 1-3nm. The carrier and the Pt nanoparticles are combined through an impregnation method, the operation is simple, the cost is low, the Pt nanoparticles are uniformly distributed on the carrier, the sizeof the Pt nanoparticles is small, and the utilization rate is higher.

Description

technical field [0001] The invention relates to a preparation method and application of a biochar catalyst loaded with Pt nanoparticles, belonging to the technical field of catalysts. Background technique [0002] At present, most chemicals in the world are produced directly or indirectly from fossil resources. With the gradual depletion of fossil fuels, the efficient synthesis of renewable high value-added chemicals is becoming more and more urgent. Biomass is a renewable resource in nature, which has the advantages of low cost and easy availability, and is considered to be an inexhaustible raw material for the production of chemicals. [0003] 5-hydroxymethylfurfural (5-hydroxymethylfurfural, HMF) obtained from biomass conversion is an important biomass platform compound, because it has multiple functional groups, such as: furan ring, aldehyde group, hydroxyl group and C=C double key. The hydrogenation of different functional groups can be rationally selected to obtain ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/42B01J37/02B01J37/08B01J37/18C07D307/42
CPCB01J23/42B01J37/0201B01J37/08B01J37/18C07D307/42Y02P20/584
Inventor 王晓峰张成城李清波
Owner DALIAN MARITIME UNIVERSITY
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