Preparation method of active meson-phase charcoal micro-balloon with high-ratio surface area and high mesoporosity

A technology of mesophase carbon microspheres and high specific surface area, which is applied in the field of activated carbon preparation and can solve the problems of low porosity in the specific surface area of ​​mesophase carbon microspheres

Inactive Publication Date: 2007-12-05
TIANJIN UNIV +1
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

However, the specific surface area and mesoporosity of the mesophase carbon microspheres prepared by this method are relatively low.

Method used

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  • Preparation method of active meson-phase charcoal micro-balloon with high-ratio surface area and high mesoporosity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: The preparation method of the high specific surface area and high porosity activated mesophase carbon microspheres of this example:

[0027] Dissolve 2 grams of ferrocene powder in toluene and mix it with 98 grams of coal tar pitch, raise the temperature to 430°C under nitrogen protection and stay there for 5 hours, and then use coal tar light components to dissolve the product and filter it after cooling down to 25°C. After extraction with toluene three times, wash with acetone, centrifuge and dry at 105°C to obtain iron-containing mesophase carbon microspheres. The above-mentioned iron-containing mesophase carbon microspheres were raised to 700°C at a heating rate of 1°C / min for carbonization for 1 hour, and then 3 grams of iron-containing mesophase carbon microspheres were mixed with 40 grams of KOH with a concentration of 30wt%, that is, potassium hydroxide The aqueous solution was mixed and stirred for 1 hour, and after vacuum drying, the slurry was p...

Embodiment 2

[0028] Embodiment 2: The preparation method of the high specific surface area and high porosity active mesophase carbon microspheres of this example:

[0029] Dissolve 4 grams of ferrocene powder in toluene and mix it with 96 grams of coal tar pitch, raise the temperature to 430°C under nitrogen protection and stay there for 5 hours, and then use coal tar light components to dissolve and filter the product after cooling down to 25°C. After extraction with toluene three times, wash with acetone, centrifuge and dry at 105°C to obtain iron-containing mesophase carbon microspheres. The above-mentioned iron-containing mesophase carbon microspheres were raised to 700°C at a heating rate of 1 °C / min for carbonization for 1 hour, and then 3 grams of iron-containing mesophase carbon microspheres were mixed with 40 grams of KOH aqueous solution with a concentration of 30 wt%. Stir for 1 hour, vacuum dry, put the slurry into a tubular activation furnace, raise the temperature to 850°C at...

Embodiment 3

[0030] Embodiment 3: the preparation method of the high specific surface area and high porosity active mesophase carbon microspheres of this example:

[0031] Dissolve 2 grams of ferrocene powder in toluene and mix it with 98 grams of coal tar pitch, raise the temperature to 430°C under nitrogen protection and stay there for 5 hours, and then use coal tar light components to dissolve the product and filter it after cooling down to 25°C. After extraction with toluene three times, wash with acetone, centrifuge and dry at 105°C to obtain iron-containing mesophase carbon microspheres. The above-mentioned iron-containing mesophase carbon microspheres were raised to 700°C at a heating rate of 1 °C / min for carbonization for 1 hour, and then 3 grams of iron-containing mesophase carbon microspheres were mixed with 40 grams of KOH aqueous solution with a concentration of 30 wt%. Stir for 1 hour, and after vacuum drying, put the slurry into a tubular activation furnace, raise the tempera...

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Abstract

The present invention relates to active carbon preparing technology, and is especially preparation process of active carbon microsphere with high specific surface area and high medium pore rate and serving as an intermediate phase. The preparation process includes the following steps: adding ferrocene powder in 1-5 wt% into petroleum asphalt or coal pitch; heating and maintaining, dissolving the product in light component of coal tar, filtering, extracting and washing; heating to carbonize intermediate carbon microsphere; mixing the carbonized intermediate carbon microsphere with activating agent, drying and setting the paste into an activating furnace; cooling, washing the product with dilute hydrochloric acid solution to eliminate alkaline compound and iron oxide, and inspecting iron ion content with potassium thiocyanate solution; and regulating pH value with deionized water to 6-7.

Description

technical field [0001] The invention relates to a technology for preparing activated carbon, in particular to a method for preparing active mesophase carbon microspheres with high specific surface area and high porosity. Background technique [0002] Activated carbon is an important branch of porous carbon materials, which is characterized by high specific surface area and porosity. Activated carbon mainly uses pores to physically adsorb molecules of a certain size, and its application fields are concentrated in gas purification, sewage treatment, food and beverage purification, and medical and health industries. The preparation of activated carbon is a process of controlling the pore distribution and specific surface area through activation. According to the classification of activation methods, it can be divided into physical activation, chemical activation and catalytic activation. At present, commercially available activated carbon is mainly prepared by physical activat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/08
Inventor 郭春雨王成扬陈明鸣时志强金志刚周华江
Owner TIANJIN UNIV
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