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Method for preparing honeycomb active carbon from coal and coal tar

A honeycomb activated carbon, coal tar technology, applied in peat processing, chemical instruments and methods, petroleum industry and other directions, can solve the problem of coal tar need to be emulsified, etc. The effect of large surface area

Inactive Publication Date: 2009-08-12
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method greatly simplifies the preparation process of honeycomb carbon, but still requires high and low temperature binders, and coal tar needs to be emulsified

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Grind Taixi anthracite to less than 154μm, according to the mass ratio of pulverized coal: pitch content of 25% coal tar = 400:150, add it to the kneader and stir evenly to make plastic slime. The plastic slime is processed by vacuum extrusion molding machine. After the mud is treated and aged, it is added to a vacuum extrusion molding machine equipped with a honeycomb mold, and molded under a molding pressure of 16Mpa to obtain a wet honeycomb body. The wet honeycomb is dried in a microwave oven until no tar vapor and water vapor escape. Using nitrogen as the protective gas, heating to 700°C for 1 hour at a heating rate of 3°C / min; then heating to 850°C at a heating rate of 5°C / min, and activating with water vapor as the activation medium for 1 hour to obtain honeycomb activated carbon. The performance indexes of honeycomb activated carbon are shown in Table 1.

Embodiment 2

[0025] The basic steps are the same as in Example 1. The pitch content in coal tar is 32%, the carbonization time is 2 hours, the activation temperature is 800°C, and the activation time is 3 hours. The performance indexes of the obtained honeycomb activated carbon are shown in Table 1.

Embodiment 3

[0027] Except that the pulverized coal is Yangquan anthracite, the mass ratio of pulverized coal: pitch content is 25% coal tar=400:200, and the molding pressure is 14Mpa, the method of Example 1 is repeated. The performance indexes of honeycomb activated carbon are shown in Table 1.

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Abstract

The invention provides a method for preparing honeycomb-like activated carbon by using coal and coal tar, which takes coal dust and the coal tar as raw materials to prepare the honeycomb-like activated carbon by grinding the coal dust, charge mixture, vacuum pugging, seal aging, vacuum extruding and moilding, drying, carbonization and activation. The method for preparing the honeycomb-like activated carbon only takes the coal tar as cementing agent, so as to overcome the defect that multiple cementing agents are needed to be applied in the technique, thus having the characteristics of simple raw materials, low production cost and easy industrialization. The produced honeycomb-like activated carbon has the characteristics of large geometric area and specific surface area, high mechanical strength and the like, and can be applied for the treatment of waste gas and waste water and catalyst carrier.

Description

Technical field [0001] The invention relates to a simple method for preparing honeycomb activated carbon from coal and coal tar, in particular to a preparation method using coal tar as both a low temperature and high temperature binder. Background technique [0002] Honeycomb activated carbon is a new type of activated carbon. It not only has the original advantages of activated carbon (developed pores and large specific surface area), but also has small bed resistance, large geometric surface area, and short gas diffusion path due to its unique honeycomb structure. Strong dust resistance and other advantages. Based on the above advantages, honeycomb activated carbon can be used for wastewater treatment, gas purification and storage, catalyst carrier, etc. Its preparation and application have attracted widespread attention from domestic and foreign research and development personnel. [0003] Currently reported honeycomb activated carbon preparation technologies mainly include ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/10C10F7/00C01B32/336
Inventor 刘振宇刘树青刘清雅
Owner BEIJING UNIV OF CHEM TECH
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