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Preparing method for activated carbon

A technology of activated carbon and surfactant, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve problems such as unfavorable industrial production and cumbersome processing technology.

Active Publication Date: 2016-01-27
ENN SCI & TECH DEV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The prior art proposes a technical scheme for processing tar pitch to obtain activated carbon as an adsorption material. However, the existing processing technology usually requires multiple processes such as pre-oxidation or coking of pitch (including steps such as pyrolysis polymerization) to produce Activated carbon with larger molecular weight and more stability; and due to cumbersome processing technology, it is not conducive to industrial production

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  • Preparing method for activated carbon

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preparation example Construction

[0023] Such as figure 1 As shown, the embodiment of the present invention provides a kind of preparation method of activated carbon, and this preparation method comprises:

[0024] S01. Obtain a pitch product, which contains alkali metal ions;

[0025] S02. Adding a catalyst to the asphalt product to obtain a first mixture; the catalyst contains at least one of alkali metal ions, alkaline earth metal ions and iron ions;

[0026] S03, performing steam activation treatment on the first mixture to obtain the first product;

[0027] S04. Adding a surfactant to the first product, performing molding treatment on the first product added with the surfactant, to obtain a molded second mixture;

[0028] S05. Carrying out carbonization treatment on the second mixture to obtain granular activated carbon.

[0029] It should be noted that pitch is a carbon-rich residue in coal tar, which can be used as a raw material for the preparation of activated carbon, an adsorption material mainly ...

Embodiment 1

[0074] Preparation Process:

[0075] S11. Using lignite as the gasification raw material for catalytic gasification, after continuous fractionation of the coal tar collected by the gasification system, collecting the asphalt product at the bottom of the evaporator;

[0076] S12. Select the asphalt product with a softening point of 110° C. as the raw material for processing activated carbon, and pulverize the asphalt product. The particle size of the pulverized asphalt particles is about 150 μm;

[0077] S13. Add sodium humate to the asphalt granules to obtain the first mixture; the amount of sodium humate added is 2% of the total mass of the asphalt granules;

[0078] S14. Using a spouted bed as an activation device, and using water vapor as an activator, perform activation treatment on the above-mentioned first mixture for an activation time of 1.2 hours to obtain a first product;

[0079] S15. Add sodium dodecylbenzenesulfonate to the first product, pass the above-mentioned...

Embodiment 2

[0084] Preparation Process:

[0085]S21. Using bituminous coal as the gasification raw material for catalytic gasification, after continuous fractionation of the coal tar collected by the gasification system, collecting the asphalt product at the bottom of the evaporator;

[0086] S22. Selecting asphalt products with a softening point of 115° C. as raw materials for processing activated carbon, and pulverizing the asphalt products. The particle size of the pulverized asphalt particles is about 250 μm;

[0087] S23. Add sodium humate to the asphalt granules to obtain the first mixture; the amount of sodium humate added is 3% of the total mass of the asphalt granules;

[0088] S24. Using a spouted bed as an activation device, and using water vapor as an activator, perform an activation treatment on the above-mentioned first mixture for an activation time of 2.5 hours to obtain a first product;

[0089] S25. Add sodium dodecylbenzenesulfonate to the first product, pass the above...

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Abstract

The embodiment of the invention provides a preparing method for activated carbon and relates to the field of catalytic coal gasification. Compared with the prior art, according to the method, the process of preliminary heat treatment on oxidizing or coking pitch is omitted, and industrial production is easy. The preparing method comprises the steps that a pitch product is obtained, wherein the pitch product contains alkali metal ions; a catalyst is added to the pitch product, and a first mixture is obtained, wherein the catalyst contains at least one of the alkali metal ions, alkaline-earth metal ions and iron ions; the first mixture is subjected to steam activating treatment, and a first product is obtained; surfactant is added to the first product, and the first product added with the surfactant is subjected to forming treatment, and a formed second mixture is obtained; the second mixture is subjected to carbonization treatment, and the granular activated carbon is obtained. The preparing method is used for preparing the activated carbon.

Description

technical field [0001] The invention relates to the field of coal catalytic gasification, in particular to a preparation method of activated carbon. Background technique [0002] Coal catalytic gasification technology is an important way of clean and efficient utilization of coal. Coal raw materials are gasified with gasification agents (such as water vapor, oxygen) under certain conditions (such as 3.5MPa, 700-800°C) under the action of catalysts. reaction, producing high concentrations of methane (CH 4 ) gas and produces tar (also known as coal tar) as a by-product. The light part (hydrocarbon mixture with small molecular weight) in tar can be directly processed into chemical products with high added value. Due to the high bed layer of materials stacked in the catalytic gasification reaction vessel, the phenomenon of delayed coking of coal raw materials during the reaction process is obvious, and the produced heavy tar (hydrocarbon mixture with large molecular weight) ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/10C01B32/336
Inventor 祖静茹李克忠张彩凌
Owner ENN SCI & TECH DEV