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Preparation method of coal-based porous carbon based on potassium carbonate cyclic activation and preparation method of biomass-based porous carbon

A technology of cyclic activation and potassium carbonate, applied in carbon compounds, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of large amount of activator used in chemical activation methods, underdeveloped pore structure of porous activated carbon materials, etc., and reduce the cost of preparation , Reduce process difficulty, easy to enlarge the effect of production

Pending Publication Date: 2019-06-04
HARBIN INST OF TECH
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Problems solved by technology

[0006] The present invention aims to solve the problem that the pore structure of the porous activated carbon material obtained by the physical activation method is underdeveloped and the amount of activator required by the chemical activation method is large in the traditional coal-based porous carbon material preparation method, and proposes a coal based on potassium carbonate cycle activation. Preparation method of based porous carbon and preparation method of biomass based porous carbon

Method used

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  • Preparation method of coal-based porous carbon based on potassium carbonate cyclic activation and preparation method of biomass-based porous carbon
  • Preparation method of coal-based porous carbon based on potassium carbonate cyclic activation and preparation method of biomass-based porous carbon
  • Preparation method of coal-based porous carbon based on potassium carbonate cyclic activation and preparation method of biomass-based porous carbon

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specific Embodiment approach 1

[0046] Specific embodiment one: the preparation method of the coal-based porous carbon based on potassium carbonate cycle activation in this embodiment is carried out according to the following steps:

[0047] 1. Raw material refinement

[0048] Crushing, grinding and sieving coal raw materials in sequence to obtain fine coal powder;

[0049] 2. Preparation of the mixture

[0050] Mixing fine coal powder and potassium carbonate by ball mill mixing or liquid phase impregnation to obtain a mixture;

[0051] 3. High temperature activation

[0052] Put the mixture in step 2 in the atmosphere furnace, raise the temperature of the atmosphere furnace to 700-1000°C and keep it warm for 0.5-10 hours, after the heat preservation is completed, lower the atmosphere furnace to room temperature naturally to obtain the activated product;

[0053]4. Cleaning of activated products

[0054] The activated product is sequentially subjected to pickling treatment for 2 to 5 times and water wash...

specific Embodiment approach 2

[0061] Embodiment 2: This embodiment differs from Embodiment 1 in that: the particle size of the pulverized coal in step 1 is 40-200 mesh. Other steps and parameters are the same as those in the first embodiment.

specific Embodiment approach 3

[0062] Embodiment 3: This embodiment is different from Embodiment 1 in that: the coal raw material in step 1 is a mixture of one or more of lignite, bituminous coal, sub-bituminous coal, and anthracite in any proportion. Other steps and parameters are the same as those in the first embodiment.

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Abstract

The invention discloses a preparation method of coal-based porous carbon based on potassium carbonate cyclic activation and a preparation method of biomass-based porous carbon, relates to a preparation method of the coal-based porous carbon and a preparation method of the biomass-based porous carbon, and aims to solve the problems that the pore structure of a porous activated carbon material obtained by a physical activation method is not developed, and the amount of an activating agent required by a chemical activation method is large. The preparation method comprises the following steps: sequentially crushing, grinding and screening raw materials, then carrying out ball milling mixing or liquid phase impregnation to mix a small amount of K2CO3 with a coal matrix, carrying out high-temperature activation on the obtained mixture in an atmosphere furnace, and cleaning and drying the activated product. According to the preparation method, the potassium carbonate can catalyze the activation reaction of an activation gas and the carbon matrix, so that the pore forming process is enhanced; in addition, the cyclic regeneration of the potassium-based component can be realized in the reaction process, so that coal or biomass-based porous carbon with developed pores can also be obtained under the addition of a small K2CO3 adding amount. The method is suitable for preparing the porous carbon.

Description

technical field [0001] The invention relates to a preparation method of coal-based porous carbon and a preparation method of biomass-based porous carbon. Background technique [0002] Due to the advantages of adjustable pore structure, stable physical and chemical structure, and environmental friendliness, porous carbon is widely used in the fields of adsorption, catalysis, and electrochemical energy storage. Pore ​​structure is an important parameter of porous carbon, which directly affects its material and energy storage process. Among them, higher active specific surface area and pore volume are the key to improving the adsorption storage capacity of target species such as electrolyte ions or gaseous molecules; appropriate pore size distribution is helpful for the diffusion and migration of target species. Therefore, it is of great significance to regulate the pore structure of porous carbon. [0003] In order to prepare porous carbons with well-developed pores and good...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/348
Inventor 孙飞王丽杰高继慧曲智斌皮信信郄志鹏
Owner HARBIN INST OF TECH
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