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Method for rapidly preparing micron-sized carbon sphere with good dispersibility

A micron-scale, dispersive technology, applied in the field of adsorption materials, can solve the problems of strong corrosiveness and easy damage to the spherical structure of HTCS, and achieve the effect of excellent performance, maintaining the shape unchanged, and low temperature.

Active Publication Date: 2019-05-03
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Common activators such as KOH, H 3 PO 4 , ZnCl 2 etc. are highly corrosive, and it is easy to destroy the spherical structure of HTCS during the activation process.

Method used

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  • Method for rapidly preparing micron-sized carbon sphere with good dispersibility
  • Method for rapidly preparing micron-sized carbon sphere with good dispersibility
  • Method for rapidly preparing micron-sized carbon sphere with good dispersibility

Examples

Experimental program
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Effect test

Embodiment 1

[0048] This example involves the rapid preparation of highly dispersible HTCS, potassium oxalate non-destructive activation of HTCS to prepare ACS, and a comparative experiment, the specific steps include:

[0049] Sample (1): Dissolve 6 parts by mass of sucrose and 1 part by mass of APS in 40 parts by volume of water, then transfer the mixed solution to 80 parts by volume of a stainless steel hydrothermal kettle lined with polytetrafluoroethylene, and place it in a hot air oven The temperature was raised to 75°C for 2 hours, and then heated to 180°C for 2 hours. The reaction solution was filtered, the filter cake was washed three times with water and ethanol, and the filter cake was dried at 80°C in a hot air oven for 8 hours to obtain 1.62 parts by mass of black fluffy powder. , named Csuc-APS(2h).

[0050] Sample (2): Dissolve 6 parts by mass of sucrose in 40 parts by volume of water, then transfer the solution to 80 parts by volume of a stainless steel hydrothermal kettle ...

Embodiment 2

[0054] This example involves the rapid preparation of highly dispersible HTCS, potassium oxalate non-destructive activation of HTCS to prepare ACS, and a comparative experiment, the specific steps include:

[0055] Sample (1): Dissolve 6 parts by mass of sucrose and 1 part by mass of APS in 40 parts by volume of water, then add 0.1M FeSO 4 0.5 parts by volume of the solution, and then transfer the mixed solution to 80 parts by volume of a stainless steel hydrothermal kettle lined with polytetrafluoroethylene, place it in an oven and heat it up to 75°C and keep it warm for 4h, then heat it up to 180°C and keep it warm for 1h. The reaction solution was filtered, the filter cake was washed three times with water and ethanol respectively, and the filter cake was baked in a hot air oven at 80° C. for 8 hours to obtain 1.86 parts by mass of a black fluffy powder, named Csuc-APS (Fe 2+ )(1h).

[0056] Sample (2): Dissolve 6 parts by mass of sucrose in 40 parts by volume of water, th...

Embodiment 3

[0061] This example involves the rapid preparation of highly dispersible HTCS, potassium oxalate non-destructive activation of HTCS to prepare ACS, and a comparative experiment, the specific steps include:

[0062] Sample (1): Dissolve 6 parts by mass of sucrose and 5 parts by mass of APS in 40 parts by volume of water, then add 0.1M FeSO 4 solution 1.5mL, and then transfer the mixed solution into 80 parts by volume of a stainless steel hydrothermal kettle lined with polytetrafluoroethylene, place it in an oven and raise the temperature to 75°C and keep it warm for 4h, then raise the temperature to 185°C and keep it warm for 2h. The liquid was filtered, the filter cake was washed three times with water and ethanol respectively, and the filter cake was dried in a hot air oven at 80°C for 8h to obtain 2.12 parts by mass of a black fluffy powder, which was named as Csuc-APS(Fe 2+ )(2h);

[0063] Sample (2): Dissolve 6 parts by mass of sucrose in 40 parts by volume of water, then...

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Abstract

The invention belongs to the technical field of adsorption materials and discloses a method for rapidly preparing a micron-sized carbon sphere with good dispersibility. The method disclosed by the invention comprises the following steps: (1) mixing 6 parts by mass of sugar and 0.2-5 parts by mass of strong oxidant and FeSO4 in water, carrying out heating for a reaction, and carrying out separationto obtain a hydrothermal carbon sphere; and (2) mixing 1 part by mass of hydrothermal carbon sphere obtain in step (1) with 1-5 parts by mass of potassium oxalate, and carrying out high-temperature roasting at an inert atmosphere and the temperature of 500-900 DEG C for 1-5 h to obtain the micron-sized carbon sphere. The method disclosed by the invention is high in reaction speed, the carbon sphere is started to be generated within 5 min since heating is started, and the reaction is to be completed within 1-4 h, so that the reaction time is greatly shortened, and the energy consumption is reduced; the prepared porous activated carbon sphere has abundant micropores and good dispersibility and has the specific surface area of 975-1430 m<2> / g; the adsorption quantity of CO2 at normal temperature and normal pressure is 3.43-3.74 mmol / g; and the method can be used for capturing CO2 at room temperature.

Description

technical field [0001] The invention belongs to the technical field of adsorption materials, in particular to a method for rapidly preparing micron-sized carbon spheres with good dispersibility. Background technique [0002] Micro- and nano-scale carbon spheres are important materials for catalysis, separation and energy storage. Among them, micro-scale carbon spheres have very ideal properties in many application fields, especially carbon microspheres with hierarchical structure or hierarchical porous structure. This structure is conducive to the transport of substances within it or the spatiotemporal control of certain chemical reaction processes. In addition, carbon microspheres are easier to separate than nanoscale carbon spheres. Therefore, the efficient and rapid preparation of stable, non-toxic, and versatile porous carbon microspheres has attracted more and more attention. [0003] Sugars (monosaccharides, disaccharides, polysaccharides) are common raw materials fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/348C01B32/318B01D53/02
CPCY02C20/40Y02P20/151
Inventor 蔡卫权刘裴
Owner GUANGZHOU UNIVERSITY
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