Method of preparing zeolite/active carbon type composite material

A technology of composite materials and activated carbon, which is applied in the preparation of activated carbon/zeolite-type composite materials and the field of preparation of zeolite/activated carbon-type composite materials, which can solve problems such as the decline in adsorption performance, prevent strong alkali corrosion, reduce costs, and ensure adsorption performance effect

Inactive Publication Date: 2008-08-06
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] When adsorbents are used in industry, they usually need to be preformed to meet the needs of practical applications, and the use of binders often results in a decrease in their adsorption performance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0019] (1) According to the weight ratio of coal gangue and asphalt powder as 4:1, mix the pulverized 200-mesh coal gangue and 150-mesh petroleum asphalt powder, add water to extrude, and dry at 120°C; the formed mixture is placed in In the muffle furnace, in nitrogen at 150ml / min, heat at 200°C and 800°C for 2 hours and 3 hours respectively; then switch to a carbon dioxide atmosphere with a flow rate of 150ml / min, and activate carbonaceous at 800°C for 16 hours . Using gravimetric adsorption at 25°C, p / p 0 Its benzene adsorption capacity was measured to be 6.61% at 0.5, and its BET specific surface area was measured to be 139m 2 / g, the total pore volume is 0.098cm 3 / g, wherein micropores below 2nm account for 39.1% of the total pore volume.

[0020] (2) The activated coal gangue is placed in a NaOH solution with a liquid-solid ratio of 6ml / g and a concentration of 3.0mol / L. After dynamic aging at 70°C for 6 hours, the temperature is raised to 100°C for dynamic crystalliz...

Embodiment approach 2

[0022] (1) Change the carbonaceous activation time in Embodiment 1 to 22 hours, and other conditions remain unchanged. The benzene adsorption amount of coal gangue after the activation is measured to be 8.35%, and the BET specific surface area is 163m 2 / g, the total pore volume is 0.109cm 3 / g, wherein micropores below 2nm account for 54.3% of the total pore volume.

[0023] (2) Change the dynamic crystallization time in Embodiment 1 to 12 hours, and keep other conditions unchanged, and the measured water absorption value of the composite material is 16.9%.

Embodiment approach 3

[0025] (1) Change the carbonaceous activation time in Embodiment 1 to 28 hours, and other conditions remain unchanged. The benzene adsorption amount of coal gangue after activation is 10.2%, and its BET specific surface is measured to be 193m 2 / g, the total pore volume is 0.116cm 3 / g, wherein micropores below 2m account for 74.32% of the total pore volume.

[0026] (2) Change the dynamic crystallization time in Embodiment 1 to 16 hours, and keep other conditions unchanged, and the measured water adsorption value of the composite material is 15.2%.

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Abstract

The invention relates to a preparation method of activated carbon / zeolite complex materials, belonging to the field of preparing inorganic materials and absorbents. The invention is characterized in that the method takes coal gangue and asphalt powders as raw materials to prepare the zeolite / activated carbon complex materials. The method comprises the followings steps: fully mixing the ground coal gangue and asphalt powders, molding by adding water and activating the carbon in the carbon dioxide atmosphere after drying and carbonizing; dynamic crystallizing the activated coal gangue in NaOH water solution and activating after washing and drying, thus obtaining the zeolite / activated carbon complex materials. The activated carbon / zeolite complex materials prepared by the method have double surface properties and porous structures of both zeolite and activated carbon with adjustable proportion; the complex materials are high in mechanical intensity, easy in preparation method, low in cost, thus having important values in comprehensive utilization of coal gangues and development of novel absorption materials.

Description

1. Technical field [0001] The invention relates to a preparation method of an activated carbon / zeolite composite material, which belongs to the field of preparation of inorganic materials and adsorbents. Specifically, it relates to a method for preparing zeolite / activated carbon type composite material by using coal gangue and asphalt powder as raw materials. 2. Background technology [0002] Coal gangue is solid waste generated during coal mining and washing and processing, and is currently one of the largest industrial solid wastes. Long-term stockpiling not only occupies a large amount of land, but also has adverse effects on the atmospheric environment and groundwater resources had extremely bad effects. Therefore, the development and research of comprehensive and effective utilization of coal gangue has important economic and social significance for resource utilization and environmental protection. [0003] As a high-quality silicon-aluminum resource, coal gangue con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/18B01J20/28B01J20/30
Inventor 马静红杜雄伟崔杏雨李瑞丰
Owner TAIYUAN UNIV OF TECH
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