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Molecular sieve analog active carbon preparation method

A kind of molecular sieve and activated carbon technology, which is applied in the field of preparation of molecular sieve-like activated carbon from anthracite, can solve the problems of poor concentration and affect the adsorption effect of products, and achieve good adsorption effect, high wear resistance and highly concentrated pore structure. Effect

Inactive Publication Date: 2006-04-26
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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Problems solved by technology

Since the reaction speed between water vapor and carbon is fast, and it takes a certain time for water vapor to diffuse into the interior of the carbon, it is easy to cause the final pore structure of the product to have a broad-spectrum distribution or poor concentration, which will affect the adsorption effect of the product.

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0012] A kind of preparation method of molecular sieve type activated carbon, is according to the ratio of coal powder and coal tar or wood tar is (1.0-3.0): 1 weight ratio, after stirring at 80-150 ℃, extruding into granules, forming The particles are hardened at 100-250°C for more than 1 hour, and then the shaped particles are heated to 250-500°C for pre-carbonization for more than 2 hours. Activated carbon at 750-950°C for 2-10 hours to make molecular sieve-like activated carbon.

Embodiment 2

[0014] A method for preparing molecular sieve activated carbon is based on the ratio (weight ratio) of coal powder to coal tar (or wood tar) being 1:1. After stirring evenly at 80°C, extrude into granules, harden the shaped granules at 100°C for more than 1 hour, then pre-carbonize at 300°C for more than 2 hours, and finally, the activator is steam: carbon dioxide = 1:1 ( weight ratio), activate the treated material at 750°C for 2 hours to make molecular sieve-like activated carbon.

Embodiment 3

[0016] A method for preparing molecular sieve activated carbon is based on the ratio (weight ratio) of coal powder to coal tar (or wood tar) being 2:1. After stirring at 100°C, extrude into granules, harden the shaped granules at 200°C for more than 1 hour, then pre-carbonize at 400°C for more than 2 hours, and finally, the activator is steam: carbon dioxide = 2:1 ( weight ratio), the treated material was activated at 850°C for 5 hours to make molecular sieve-like activated carbon.

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Abstract

The preparation process of molecular sieve-like active carbon includes mixing coal powder with coal tar or wood tar at 80-150 deg.c, extruding the mixture into grain, hardening the grain for over 1 hr, heating at 250-500 deg.c for over 2 hr to precarbonize, and final activating with activating agent comprising water vapor and CO2 in the weight ratio of 1.0-5.0 at 750-950 deg.c for 2-10 hr to obtain the molecular sieve-like active carbon. The prepared active carbon has high adsorption effect, highly concentrated pore structure and antiwear strength over 96 %, and may be used in the purification of high purity gas.

Description

technical field [0001] The invention relates to a preparation technology of molecular sieve-like activated carbon, in particular to a preparation method of using anthracite to prepare molecular sieve-like activated carbon. Background technique [0002] Molecular sieve-like activated carbon products have special micropore distribution, developed and highly concentrated micropores, and are currently mainly used in high-purity gas purification processes. High-end products used in important occasions currently rely on imports in China. There is only Sichuan Mianyang Activated Carbon Factory in China that produces molecular sieve-like activated carbon products, which are used in pressure swing adsorption to refine hydrogen. Its activation process adopts the traditional steam activation method. Since the reaction speed between water vapor and carbon is fast, and it takes a certain time for water vapor to diffuse into the interior of the carbon, it is easy to cause the final pore...

Claims

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Application Information

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IPC IPC(8): C01B31/08
Inventor 刘石彩蒋剑春邓先伦应浩戴伟娣童娅娟高一苇许玉
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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