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Modification method of activated carbon fiber filter screen for removing higher concentration formaldehyde in air and its product and application

A technology of activated carbon fiber and filter screen, which is applied in the field of modification of activated carbon fiber filter screen, can solve the problems of insufficient service life and high cost of use, and achieve the effects of increased unit adsorption capacity, long penetration time, and wide sources

Active Publication Date: 2021-12-03
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the existing modification treatment methods, such as hydrogen peroxide surface modification, strong acid and strong alkali surface modification, and high temperature surface modification, have improved the efficiency of formaldehyde treatment to a certain extent, their service life is not long enough and the cost of use is relatively high.

Method used

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  • Modification method of activated carbon fiber filter screen for removing higher concentration formaldehyde in air and its product and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] An activated carbon fiber filter screen for removing higher concentrations of formaldehyde in the air, using ozone and ammonium persulfate to treat the activated carbon fiber filter screen as a formaldehyde adsorbent, prepared according to the following steps:

[0034] Step 1 Activated carbon fiber filter pretreatment: put 10ml of activated carbon fiber filter in an oven for heat treatment at 200°C for 4 hours;

[0035] Step 2. Ozone surface strong oxidation treatment of activated carbon fiber filter: add it to an ozone oxidation device equipped with 50ml deionized water, control the flow rate to 500ml / min, and pass through 100mg / L ozone for 0.5h;

[0036] Step 3 drying treatment: flatten the activated carbon fiber filter screen after the ozone treatment in step 2, and dry it in an oven at 110°C for 12 hours;

[0037] Step 4 ammonium persulfate modification treatment: the activated carbon fiber filter screen dried in step 3 is impregnated with 0.05mol / L ammonium persulf...

Embodiment 2

[0040] An activated carbon fiber filter screen for removing higher concentration formaldehyde in the air is prepared according to the following steps:

[0041] Step 1 Activated carbon fiber filter pretreatment: put 10ml of activated carbon fiber filter in an oven for heat treatment at 200°C for 5 hours;

[0042] Step 2 Ozone surface strong oxidation treatment of activated carbon fiber filter screen: add the activated carbon fiber filter screen pretreated in step 1 into the ozone oxidation device equipped with 50ml deionized water, control the flow rate to 500ml / min, and pass through 100mg / L ozone treatment 0.5h;

[0043] Step 3 drying treatment: flatten the activated carbon fiber filter screen after the ozone treatment in step 2, and dry it in an oven at 110°C for 12 hours;

[0044] Step 4 ammonium persulfate modification treatment: the activated carbon fiber filter screen dried in step 3 is impregnated with 0.08mol / L ammonium persulfate solution at 60°C for 24 hours;

[004...

Embodiment 3

[0047]An activated carbon fiber filter screen for removing higher concentration formaldehyde in the air is prepared according to the following steps:

[0048] Step 1 Activated carbon fiber filter pretreatment: put 10ml of activated carbon fiber filter in an oven for heat treatment at 200°C for 8 hours;

[0049] Step 2 Ozone surface strong oxidation treatment of activated carbon fiber filter screen: add the activated carbon fiber filter screen pretreated in step 1 into the ozone oxidation device equipped with 50ml deionized water, control the flow rate to 500ml / min, and pass through 100mg / L ozone treatment 0.5h;

[0050] Step 3 drying treatment: flatten the activated carbon fiber filter screen after the ozone treatment in step 2, and dry it in an oven at 110°C for 12 hours;

[0051] Step 4 ammonium persulfate modification treatment: the activated carbon fiber filter screen dried in step 3 is impregnated with 0.10 mol / L ammonium persulfate solution at 60°C for 12 hours for modi...

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Abstract

The invention discloses a method for modifying an activated carbon fiber filter screen for removing formaldehyde with a relatively high concentration in the air and its product and application, including activated carbon fiber filter screen pretreatment, activated carbon fiber filter screen ozone surface strong oxidation treatment, drying treatment, filtration Ammonium sulfate modification treatment and drying treatment, the obtained activated carbon fiber filter was laid flat, and dried in an oven at 110° C. for 24 hours to obtain the desired product. The preparation process of the present invention is simple, and the prepared modified activated carbon fiber filter screen has a concentration of formaldehyde of 15 mg / m 3 When the removal rate reaches 100%, and can last for a long time.

Description

technical field [0001] The invention relates to a method for modifying an activated carbon fiber filter screen, in particular to a method for modifying an activated carbon fiber filter screen for removing high-concentration formaldehyde in the air, as well as its product and application. Background technique [0002] Formaldehyde (HCHO) is a common indoor and car air pollutant. Its impact on human health is mainly manifested in abnormal smell, irritation, allergy, abnormal lung function, abnormal liver function, etc. The National Occupational Safety and Health Organization has announced Formaldehyde may be carcinogenic to humans, so it has received more and more attention from people. [0003] In specific places, such as the disinfection treatment of cell rooms in the biological industry, high-concentration formaldehyde solution fumigation is required. Due to the airtight space of the sterilized place, only relying on ventilation to discharge to the outside will often cause ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20B01J20/30B01D53/82B01D53/72
CPCB01D53/72B01D53/82B01D2253/102B01D2257/708B01J20/0281B01J20/20B01J2220/4806
Inventor 徐荣赵昆峰袁静蔡婷金彩虹
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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