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Coal-based active coke hole structure grouping regulation method based on coal internal ash catalytic activation

A catalytic activation and activated coke technology, applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve the problems of high cost, large amount of activator used in chemical activation, adsorption kinetics of microporous carbon materials, universal application Poor performance and other problems, to achieve the effect of reducing preparation cost, low cost, and reducing process difficulty

Active Publication Date: 2019-08-27
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention aims to solve the problems of the traditional coal-based porous carbon material preparation method, the physical activation method obtains microporous carbon material adsorption kinetics characteristics, poor universality, and the chemical activation method requires a large amount of activator and high cost.

Method used

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  • Coal-based active coke hole structure grouping regulation method based on coal internal ash catalytic activation
  • Coal-based active coke hole structure grouping regulation method based on coal internal ash catalytic activation
  • Coal-based active coke hole structure grouping regulation method based on coal internal ash catalytic activation

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specific Embodiment approach 1

[0034] Specific implementation mode 1: The coal-based active coke pore structure matching control method based on the catalytic activation of coal internal ash in this embodiment is carried out according to the following steps:

[0035] 1. Raw material refinement

[0036] The raw materials are crushed, ground and sieved in sequence to obtain fine coal powder;

[0037] 2. Chemical deashing pretreatment

[0038] Mix the pulverized coal in the previous step with an acid solution or alkali solution, heat and stir for 10 to 12 hours, then wash with deionized water until the pH is neutral and dry, or perform the following operations in sequence for the pulverized coal in the previous step: mix with acid and alkali The mixed solution is mixed evenly, heated and stirred and washed to obtain the mixture;

[0039] 3. High temperature activation

[0040] Put the mixture in step 2 in the atmosphere furnace, raise the temperature of the atmosphere furnace to 700°C-1000°C and keep the te...

specific Embodiment approach 2

[0048] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the fixed carbon content of the raw material is 30% to 80%, the volatile matter content is 20% to 50%, the ash content is 0 to 50%, and the moisture The content is 0-30%; the elemental analysis requirements of the coal type are: the content of carbon element is 50%-80%, the content of hydrogen element is 0%-10%, the content of oxygen element is 0%-30%, and the raw material is within the above range A coal or a mixture of multiple coals in any proportion; the particle size of the finely divided coal powder is 40 mesh to 300 mesh. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0049] Specific embodiment three: the difference between this embodiment and specific embodiment one is: the acid solution in step two is hydrochloric acid (HCl), hydrofluoric acid (HF), sulfuric acid (H 2 SO 4 ), nitric acid (HNO 3 ) or acetic acid (CH 3 COOH); Wherein, the concentration of hydrochloric acid solution is 0.1~20M, the concentration of hydrofluoric acid solution is 1%~50%, the concentration of sulfuric acid solution is 0.1~20M, the concentration of nitric acid solution is 0.1~20M, the concentration of acetic acid solution is 1% to 50%. Others are the same as in the first embodiment.

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Abstract

The invention provides a coal-based active coke hole structure grouping regulation method based on coal internal ash catalytic activation and relates to the field of porous carbon materials. The method aims to solve the problems that in traditional coal-based porous carbon material preparation methods, microporous carbon materials obtained through physical activation methods have poor adsorption academic properties and universality and chemical activation methods require a large number of activators and a high cost. Coal is used as a raw material, an inorganic component in inherent ash of thecoal is directionally removed through different kinds of de-ashing pretreatment, namely acid washing or alkaline washing, the catalytic pore forming effect of the natural ash is utilized, and after acatalytic physical activation process and a subsequent cleaning process, a microporous carbon material or a graded porous carbon material with excellent gas adsorption / storage characteristics can be obtained. The method is applied to the field of porous carbon materials.

Description

technical field [0001] The invention relates to the field of porous carbon materials, in particular to a coal-based active coke pore structure grouping control method based on coal internal ash catalytic activation. Background technique [0002] Porous carbon materials have the advantages of stable physical and chemical structure, controllable pore and surface chemical properties, and environmental friendliness. They have important application values ​​in the fields of adsorption, catalysis, and energy storage. The adsorption and storage performance of porous carbon materials depends on the matching relationship between their pore structure and the dynamic diameter of adsorbates (gas molecules, liquid phase molecules). In general, the microporous structure (pore diameter<2nm) is suitable for small gas molecules (such as CO 2 , SO 2 、H 2 、CH 4 etc.), the medium and large pores (the diameter of the medium pores is 2-50nm, and the diameter of the large pores >50nm) ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/318C01B32/336
CPCC01B32/318C01B32/336
Inventor 孙飞郄志鹏王丽杰高继慧皮信信赵广播
Owner HARBIN INST OF TECH
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