A modification method of active carbon fiber capable of efficiently removing air pollutants

A technology for activated carbon fibers and air pollutants, applied in separation methods, chemical instruments and methods, alkali metal compounds, etc., can solve the problems of requiring ultraviolet or visible light, complex process, limited adsorption, etc. Broad application prospects and the effect of prolonging the service life

Inactive Publication Date: 2014-08-13
GUANGXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Activated carbon fiber (ACF) is a material prepared by hardening and activating raw material fibers. It has a high specific surface area and abundant micropores, and can effectively adsorb various inorganic and organic compounds. Polarity, limited adsorption of polar molecules such as formaldehyde, and easy desorption
It is usually modified. At present, there are mainly modification methods such as chemical impregnation, loaded photocatalyst, and high-temperature water vapor, but each has its own defects that limit its application.
The high-temperature water vapor method has complex processes, many procedures, and high cost; the loaded photocatalyst method has disadvantages such as harsh reaction conditions, need for ultraviolet or visible light, and easy deactivation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Cut the activated carbon fiber into a rectangle of 145 mm × 80 mm, wash it with deionized water three times, then wash it with dilute hydrochloric acid, and then wash it repeatedly with deionized water, then place it at 100 ° C to ventilate and dry it, and cool it for later use; take a certain amount of modified The neutralizing agent was prepared into a solution with a concentration of 0.15mol / L in a beaker, wherein the modifying agent was sodium dichloroisocyanurate and potassium permanganate in a molar ratio of 1:0.08; then 0.02 wt % stabilizer ethylenediaminetetraacetic acid, and then add the prepared activated carbon fiber to it; put the above impregnation device into the ultrasonic oscillator, adjust the pH value to 5, heat the water bath to 80°C, turn on the ultrasonic vibration and impregnate for 0.5h; take out Then dry it in a ventilated place, then put it in an oven at 80°C for 8 hours, and cool it down to room temperature naturally.

[0018] After 3 paralle...

Embodiment 2

[0020] Cut the activated carbon fiber into a rectangle of 145 mm × 80 mm, wash it with deionized water for 4 times, then wash it with dilute hydrochloric acid, and then wash it repeatedly with deionized water, then place it at 100 ° C to ventilate and dry it, and cool it for later use; take a certain amount of modified The modifier is prepared in a beaker to a solution with a concentration of 0.25mol / L, wherein the modifier is sodium dichloroisocyanurate and ammonium sulfate, and the molar ratio is 1:0.1; then add 0.03 wt % stabilizer ethylenediaminetetraacetic acid, and then add the prepared activated carbon fiber to it; put the above impregnation device into the ultrasonic oscillator, adjust the pH value to 6, heat the water bath to 85°C, turn on the ultrasonic vibration and impregnate for 1h; after taking it out Dry it in a ventilated place first, then put it in an oven at 85°C for 6 hours, and cool it down to room temperature naturally.

[0021] After 3 parallel tests, a...

Embodiment 3

[0023] Cut the activated carbon fiber into a rectangle of 145 mm × 80 mm, wash it with deionized water for 5 times, then wash it with dilute hydrochloric acid, and then wash it repeatedly with deionized water, then place it at 100°C to ventilate and dry it, and cool it for later use; take a certain amount of modified The modifier was prepared in a beaker to a solution with a concentration of 0.35mol / L, wherein the modifiers were sodium dichloroisocyanurate and hexamethylenetetramine, and the molar ratio was 1:0.15; then 0.05 wt % stabilizer ethylenediaminetetraacetic acid, and then add the prepared activated carbon fiber to it; put the above impregnation device into the ultrasonic oscillator, adjust the pH value to 7, heat the water bath to 90°C, turn on the ultrasonic vibration and impregnate for 1.5h; take out Then dry it in a ventilated place, then put it in an oven at 90°C for 4 hours, and cool it down to room temperature naturally.

[0024] After 3 parallel tests, after...

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PUM

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Abstract

The invention discloses a modification method of active carbon fiber capable of efficiently removing air pollutants. The method includes: adding active carbon fiber adopted as a base material into a modification solution having a certain concentration prepared from one or more of sodium dichloroisocyanurate, sodium persulfate, potassium permanganate, hexamethylenetetramine and ammonium sulfate; adjusting the pH value, performing ultrasonic oscillation at a certain temperature for a certain period of time; drying in a drying oven at a certain temperature for a certain period of time; and naturally cooling. The method is advantaged by being simple and feasible, less in equipment material, low in cost, and the like. Tests show that: the product of the method can efficiently remove formaldehyde and other harmful gas in air, the removing cycle is short, the removing rate is increased by 54.1% than that before modification, and the removing rate after continuous use for 48 h is increased by more than 80% than that before modification. The method can be widely used in the fields of poison gas and harmful gas protection, indoor air purification, and the like, and has a wide application prospect.

Description

technical field [0001] The invention relates to the field of protection and filtration of toxic and harmful gases, in particular to a modification method of activated carbon fiber (ACF) for efficiently removing air pollutants. Background technique [0002] In recent years, pollution caused by air pollutants such as formaldehyde has attracted more and more attention. Among them, formaldehyde is listed as the primary indoor pollutant due to its wide pollution range, high pollution concentration, and great harm. As a prominent issue of human health and safety, its pollution prevention and control technology has also become a hot spot of global concern. [0003] Activated carbon fiber (ACF) is a material prepared by hardening and activating raw material fibers. It has a high specific surface area and abundant micropores, and can effectively adsorb various inorganic and organic compounds. Polarity, the adsorption of polar molecules such as formaldehyde is limited, and it is eas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30B01D53/02
Inventor 蒙冕武刘明登刘庆业邓希敏
Owner GUANGXI NORMAL UNIV
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