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Active carbon adsorbent material for removing indoor formaldehyde, and preparation method and application thereof

A technology of activated carbon adsorption and activated carbon, which is applied in the field of indoor air purification, can solve the problems of poor formaldehyde removal effect and complicated process, and achieve the effects of improving the removal capacity, increasing surface activity and increasing the load.

Inactive Publication Date: 2017-09-15
GUANGZHOU TRIZ INFORMATION TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in the existing preparation methods, either the process is complicated or the formaldehyde removal effect is not good, which limits its application to a certain extent.

Method used

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  • Active carbon adsorbent material for removing indoor formaldehyde, and preparation method and application thereof
  • Active carbon adsorbent material for removing indoor formaldehyde, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1) Preparation of ZnCl 2 and CaCl 2 The mixed solution of the solution, so that the molar ratio of Zn and Ca is 3: 1, the total concentration of cations is 1mol / L, the activated carbon is soaked in the mixed solution for 15 hours, filtered, then the activated carbon is placed in the reaction kettle, and nitrogen is discharged. Air, calcined at 300°C for 2 hours;

[0024] 2) The product obtained in step 1) was put into HCl solution and continued to boil for 2 hours to remove Zn and Ca ions, rinsed with distilled water for 5 times after cooling to room temperature, until no chloride ions were detected; then dried in an oven at 105°C 8 hours;

[0025] 3) Prepare an aqueous solution of lysine, the concentration of which is 10wt%. The modified activated carbon obtained in step 2) is immersed in the amino acid aqueous solution for 5 hours, and freeze-dried to obtain activated carbon adsorption material AC-1.

Embodiment 2

[0027] 1) Preparation of ZnCl 2 and CaCl 2 The mixed solution of the solution, so that the molar ratio of Zn and Ca is 1:1, the total concentration of cations is 0.5mol / L, the activated carbon is soaked in the mixed solution for 15 hours, filtered, then the activated carbon is placed in the reaction kettle, and nitrogen gas is passed into it. Exhaust the air and calcinate at 300°C for 2 hours;

[0028] 2) The product obtained in step 1) was put into HCl solution and continued to boil for 2 hours to remove Zn and Ca ions, rinsed with distilled water for 5 times after cooling to room temperature, until no chloride ions were detected; then dried in an oven at 105°C 8 hours;

[0029] 3) Prepare an aqueous solution of serine, the concentration of which is 10wt%. The modified activated carbon obtained in step 2) is immersed in the aqueous solution of serine for 5 hours, and freeze-dried to obtain activated carbon adsorption material AC-2.

Embodiment 3

[0031] 1) Preparation of ZnCl 2 and CaCl 2 The mixed solution of the solution, so that the molar ratio of Zn and Ca is 1:1, the total concentration of cations is 1mol / L, the activated carbon is soaked in the mixed solution for 15 hours, filtered, then the activated carbon is placed in the reaction kettle, and nitrogen gas is passed through to discharge Air, calcined at 300°C for 2 hours;

[0032] 2) The product obtained in step 1) was put into HCl solution and continued to boil for 2 hours to remove Zn and Ca ions, rinsed with distilled water for 5 times after cooling to room temperature, until no chloride ions were detected; then dried in an oven at 105°C 8 hours;

[0033] 3) Prepare a mixed aqueous solution of lysine and serine, the concentration of which is 10wt%. The modified activated carbon obtained in step 2) is immersed in the mixed aqueous solution for 5 hours, and freeze-dried to obtain activated carbon adsorption material AC-3.

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Abstract

The invention provides an active carbon adsorbent material for removing indoor formaldehyde, and a preparation method and an application thereof. The preparation method comprises the following steps: 1, preparing a ZnCl2 and CaCl2 solution mixed solution, impregnating active carbon in the mixed solution, filtering the solution, placing the active carbon in a reaction kettle, introducing nitrogen to dispel air, and calcining the active carbon at 200-400 DEG C for 1-3 h; 2, placing a product obtained in step 1 in an HCl solution, continuously boiling the obtained product and the HCl solution for 1-2 h to remove Zn and Ca ions, cooling the solution to the active carbon to room temperature, flushing the cooled active carbon with distilled water 3-5 times until no chloride ions can be detected, and drying the flushed active carbon in an oven at 105 DEG C for 4-10 h; and 3, preparing an aqueous amino acid solution, impregnating the modified active carbon obtained in step 2 in the aqueous amino acid solution for 3-8 h, and carrying out freeze drying to obtain the active carbon adsorbent material. The active carbon adsorbent material can be used to remove the indoor formaldehyde.

Description

technical field [0001] The invention relates to the technical field of indoor air purification, in particular to an activated carbon adsorbent material for removing indoor formaldehyde, a preparation method and an application thereof. Background technique [0002] With the rapid development of the national economy and the gradual improvement of people's material living standards, interior decoration has become increasingly popular. Indoor air pollution caused by improper use of decoration consumables is becoming more and more serious. One of the most significant problems is that the continuous release of indoor formaldehyde (HCHO) exceeds environmental standards. In my country, formaldehyde ranks second on the priority control list of toxic chemicals, and is recognized by the World Health Organization as a carcinogenic and teratogenic substance. Formaldehyde is highly toxic and is a well-recognized source of allergy poisoning. It is also a potential strong mutagenic substan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/32B01D53/02
CPCB01J20/20B01D53/02B01D2257/708B01J20/22B01J20/3246
Inventor 不公告发明人
Owner GUANGZHOU TRIZ INFORMATION TECH LTD