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Biomass superstructure carbon as well as preparation method and application thereof

A biomass and superstructure technology, applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve the problems of low output, high cost of microporous carbon materials, difficulties in transmission and storage, and achieve expensive results

Pending Publication Date: 2022-02-11
四川金时新能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above prior art, the present invention provides a biomass superstructure carbon and its preparation method and application to solve the problems of high cost, low output, low specific surface area, difficulty in transportation and storage, etc. of the microporous carbon material prepared by the existing method

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  • Biomass superstructure carbon as well as preparation method and application thereof
  • Biomass superstructure carbon as well as preparation method and application thereof
  • Biomass superstructure carbon as well as preparation method and application thereof

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preparation example Construction

[0031] A preparation method of biomass superstructure carbon, comprising the steps of:

[0032] (1) Biomass precursor preparation: add ramie and 1-6mol / L KOH solution into the reaction lining according to the ratio of 1g to 6mol / L: 30-40mL, and then heat up to 170-190°C, and set the temperature at 170-190°C React for 5-7 hours, cool down after the reaction is over, and then filter with suction to get ramie with KOH molecules pre-embedded, and then dry it to obtain it;

[0033] (2) Preparation of biomass superstructure carbon: Mix the biomass precursor and metal magnesium evenly at a mass ratio of 1 to 6:1, then raise the temperature to 650 to 750°C in a protective gas environment, and then pass the gas flow rate to 15-25sccm of CO 2 React at 650-750°C for 30-90 minutes to obtain it.

Embodiment 1

[0035] A preparation method of biomass superstructure carbon, comprising the steps of:

[0036] (1) Preparation of biomass precursor: add ramie and 3mol / L KOH solution into the reaction lining according to the ratio of material to liquid: 1g: 35mL, and then place it in a hydrothermal reaction kettle and heat it up to 180°C in a blast drying oven , reacted at 180°C for 6 hours, cooled after the reaction was completed, and filtered to obtain ramie with KOH molecules pre-embedded, and then dried at 70°C for 12 hours to obtain the product;

[0037] (2) Biomass superstructure carbon preparation: the biomass precursor and metal magnesium were mixed in a ball mill at a rotation speed of 500r / min for 2h at a mass ratio of 3:1, and then in an argon environment with a gas flow rate of 40sccm Raise the temperature to 700°C, and then feed CO with a flow rate of 20 sccm 2 React at 700°C for 60 minutes to obtain it.

[0038] (3) Immerse the biomass superstructure carbon obtained in step (...

Embodiment 2

[0040] A preparation method of biomass superstructure carbon, comprising the steps of:

[0041] (1) Preparation of biomass precursor: Add ramie and 2mol / L KOH solution into the reaction lining according to the ratio of material to liquid: 1g: 30mL, and then place it in a hydrothermal reaction kettle and heat it up to 170°C in a blast drying oven , reacted at 170°C for 7 hours, cooled after the reaction, and filtered to obtain ramie with pre-embedded KOH molecules, and then dried at 60°C for 14 hours to obtain the product;

[0042](2) Biomass superstructure carbon preparation: the biomass precursor and metal magnesium were mixed in a ball mill at a rotation speed of 400r / min for 2.5h at a mass ratio of 2:1, and then placed in an argon environment with a gas flow rate of 30sccm The temperature was raised to 750°C, and then the gas flow rate was 15 sccm of CO 2 Reaction at 750 ° C for 30 minutes, that is.

[0043] (3) Submerge the biomass superstructure carbon obtained in step ...

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Abstract

The invention discloses biomass superstructure carbon and a preparation method and application thereof, and the method comprises the following steps: (1) preparation of a biomass precursor: adding ramie and a 1-6mol / L KOH solution into a reaction lining according to a material-liquid ratio of 1g: (30-40mL), then heating to 170-190 DEG C, reacting for 5-7h at 170-190 DEG C, cooling after the reaction is finished, then carrying out suction filtration to obtain KOH molecule pre-embedded ramie, and then drying to obtain the biomass precursor; and (2) preparation of the biomass superstructure carbon: uniformly mixing the biomass precursor and magnesium metal according to a mass ratio of (1-6): 1, heating to 650-750 DEG C in a protective gas environment, introducing CO2 with a gas flow of 15-25 sccm, and reacting at 650-750 DEG C for 30-90 minutes to obtain the biomass superstructure carbon. The preparation process is simple, the cost is low, batch production can be realized, and the prepared biomass superstructure carbon has a multi-level pore structure and a high specific surface area.

Description

technical field [0001] The invention belongs to the technical field of preparation of microporous carbon materials, and in particular relates to a biomass superstructure carbon and its preparation method and application. Background technique [0002] Due to its special pore structure and high specific surface area, microporous carbon materials play an important role in daily life. At present, microporous carbon materials have been widely used in the storage and separation of gases, electrode materials for batteries or capacitors, catalysts or catalyst supports for various chemical reactions, sewage treatment, precious metal recovery and other fields. [0003] The existing preparation methods of microporous carbon materials include physical activation method or chemical activation method and CVD method. Porous carbon materials prepared by physical activation or chemical activation have a pore structure dominated by micropores, and large-sized electrolyte ions have problems i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/348C01B32/324H01G11/34
CPCC01B32/348C01B32/324H01G11/34
Inventor 杨维清王庆李杰童琦峻江欣
Owner 四川金时新能科技有限公司
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