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Preparation method of porous nitrogen-rich carbon material

A technology of porous composite materials and carbon materials, which is applied in the field of preparation of porous nitrogen-rich carbon materials, can solve the problems of large randomness of nitrogen content and no literature reports, and achieves the improvement of utilization rate, contribution and yield. Effect

Active Publication Date: 2022-07-15
ZHENGZHOU TOBACCO RES INST OF CNTC
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] At present, the nitrogen content of carbon materials prepared from plant materials is relatively random. In various preparation methods of carbon materials, there is no literature on the controllable utilization of endogenous nitrogen in plant precursors, especially volatile endogenous nitrogen. report or patent application

Method used

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  • Preparation method of porous nitrogen-rich carbon material
  • Preparation method of porous nitrogen-rich carbon material
  • Preparation method of porous nitrogen-rich carbon material

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Embodiment 1

[0035] see figure 1 , the present embodiment provides a method for preparing a porous nitrogen-rich carbon material, comprising:

[0036] In the pretreatment, the tobacco leaves are washed and then dried in an oven at 50° C. to a moisture content of 5%, and pulverized to 20-40 mesh to obtain tobacco leaf particulate material, which is irregular spherical; an activation solution is provided, and the activation solution is composed of 5% ZnCl 2 and 0.5mol / L CuBr;

[0037] Activation: Weigh 10 g of the obtained tobacco leaf particulate material, place it in the activation solution after drying, immerse it in the activation solution, filter it, dry it in an oven at 50 °C, and adjust the ZnCl for several times. 2 and the total loading of CuBr to obtain tobacco leaf activation material, and the ZnCl in it 2 and the total loading of CuBr is 5% of the mass of the tobacco leaf particles;

[0038] Impregnated with 5% SiCl by volume 4 ether solution, the SiCl 4 Dip the tobacco leaf...

Embodiment 2

[0042] This embodiment provides a preparation method of a porous nitrogen-rich carbon material. The preparation method is basically the same as the preparation method provided in Embodiment 1. The main difference is that the raw material used in this embodiment is tobacco sheet, and the coupling reagent is CuOTf, other steps and process parameters are the same.

Embodiment 3

[0044] This embodiment provides a preparation method of a porous nitrogen-rich carbon material. The preparation method is basically the same as the preparation method provided in Embodiment 1. The main difference is that the raw material used in this embodiment is tobacco stalk, and the coupling reagent is FeCl 2 , other steps and process parameters are the same.

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Abstract

The present invention provides a method for preparing a porous nitrogen-rich carbon material, which comprises: pre-processing, activating, impregnating, carbonizing and purifying a nitrogen-rich herbal material to obtain a porous nitrogen-rich carbon material, wherein the pretreated The step also includes providing an activation solution, the activation solution comprising an activator with a mass fraction of 1% to 20% and a coupling reagent of 0.1 to 2 mol / L; the main purpose of the impregnation step is to form inorganic activating agents on the surface of the herbal activating material. Floor. During the carbonization process, the nitrogen-containing organic compounds in the nitrogen-rich herbal material are grafted into the carbon skeleton under the action of the coupling reagent, and the volatile nitrogen-containing compounds are bound by the coating layer during the heating process to change the carbonization. Therefore, the above preparation method provided by the present invention can effectively improve the utilization rate of endogenous nitrogen elements in the preparation process of herb-based carbon materials, and at the same time increase the yield of carbon products.

Description

technical field [0001] The invention relates to the recycling of herbaceous plant waste, in particular to a preparation method of a porous nitrogen-rich carbon material. Background technique [0002] Activated carbon is a kind of porous solid carbon material. Because of its developed void structure and huge specific surface area, it endows it with unique strong adsorption properties. In addition, its chemical properties are stable and insoluble in water and most other solvents, making it suitable for It has been widely used in adsorption, separation, catalysis and other fields. Studies have shown that the binary composite filter rod made of activated carbon and acetate fiber in a certain proportion has a significant effect in selectively reducing cigarette tar, benzopyrene, carbonyl compounds, etc. very important meaning. [0003] The preparation of herbal-based porous carbon is mainly based on the thermal conversion process of raw materials. According to whether there is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/318C01B32/324C01B32/342C01B32/348C01B32/378
CPCC01B32/318C01B32/324C01B32/342C01B32/348C01B32/378
Inventor 王金棒贾楠艾继涛邱纪青刘亚丽汪志波郑路张仕华洪群业
Owner ZHENGZHOU TOBACCO RES INST OF CNTC
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