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Technology for preparing high oxygenous functional group activated carbon through phosphate activation method

A preparation process, phosphate ester technology, applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve the problems that activated carbon has not yet been studied, and achieve the effect of rich oxygen-containing functional groups, high yield, and strong adsorption

Active Publication Date: 2015-01-21
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

After searching, there is no research on the preparation of activated carbon with phosphate ester as activator

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Mix lotus rod powder with trimethyl phosphate at a mass ratio of 1:2, soak at room temperature for 6 hours, and then soak at 90 degrees for 4 hours; then place the impregnated samples above in a muffle furnace and carbonize at 450 degrees Activation for 1 hour; after cooling, wash with deionized water and dry to obtain activated carbon. The specific surface area of ​​the activated carbon was measured to be 590m 2 / g, the amount of surface acidic functional groups is 3.04mmol / g.

Embodiment 2

[0013] Mix lotus rod powder with tributyl phosphate at a mass ratio of 1:3, and soak for 12 hours at room temperature; then place the impregnated sample in a muffle furnace, and activate it by carbonization at 450 degrees for 50 minutes; after cooling, Wash with deionized water and dry to obtain activated carbon. The specific surface area of ​​the activated carbon was measured to be 541m 2 / g, the amount of surface acidic functional groups is 2.87mmol / g.

Embodiment 3

[0015] Mix lotus stem powder with triphenyl phosphate at a mass ratio of 1:5, and soak at 80 degrees for 12 hours. Place the above impregnated sample in a muffle furnace, carbonize and activate it at 500 degrees for 40 minutes; after cooling, wash it with deionized water and dry it to obtain activated carbon. The specific surface area of ​​the activated carbon was measured to be 650m 2 / g, the amount of surface acidic functional groups is 2.71mmol / g.

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Abstract

The invention relates to a technology for preparing high oxygenous functional group activated carbon through a phosphate activation method. The technology comprises the following steps of: mixing lotus stem powder with phosphate powder according to different mass ratios, soaking at room temperature for 6-12 hours, putting the soaked sample into a muffle furnace, carbonizing and activating for 40-60 minutes at the temperature of 450 DEG C-550 DEG C, cooling, cleaning with deionized water and drying. The preparation technology is simple and has high activated carbon yield; and the activated carbon has developed pores, is rich in nitrogenous functional group, has strong absorption property and can effectively remove harmful pollutants.

Description

1. Technical field [0001] The invention relates to a process for preparing activated carbon by a phosphate ester activation method, and belongs to the technical field of activated carbon preparation. 2. Background technology [0002] Activated carbon is a commonly used porous adsorbent and catalyst carrier, which is widely used in the treatment of industrial tail gas, decolorization and removal of toxic organics and heavy metal ions. The activators used in the preparation of activated carbon are mainly phosphoric acid, potassium hydroxide and zinc chloride. The phosphoric acid activation method is widely used because of its advantages of high yield, low energy consumption and low pollution. However, the oxygen-containing functional groups on the surface of activated carbon prepared by phosphoric acid activation method are relatively low. Phosphate is an organic ester of phosphoric acid, which is often used as a flame retardant for polymer materials. At high temperature, p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/12C01B32/324C01B32/342
Inventor 张建刘海张成禄程呈李一冉
Owner SHANDONG UNIV
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