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Adsorbent used for separating formaldehyde from air and preparation method thereof

A technology of adsorbent and air, which is applied in the field of adsorbent and its preparation, can solve the problems of poor performance and achieve the effects of long service life, thorough purification and large adsorption capacity

Inactive Publication Date: 2010-02-10
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the adsorption and separation performance of low-concentration formaldehyde in the gas phase by activated carbon without special treatment is poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Embodiment 1, The solution immersion method is used to prepare the adsorbents numbered 1 to 9, and the preparation method is as follows:

[0033] (1) Use ethanol as a solvent to dissolve the precursor.

[0034] First add 100 mL of absolute ethanol to a 500 mL beaker, and then add 1 gram of ammonium carbonate, so that the ammonium carbonate is completely dissolved and mixed evenly.

[0035] (2) adding the carrier to a solution composed of ethanol and precursors;

[0036] 30 grams of granular activated carbon with a particle size of 2 mm was added to the solution of ethanol and precursors.

[0037] (3) The ethanol solution in which the precursor is dissolved is uniformly mixed with the carrier.

[0038] Gently stir with a glass rod, so that the ethanol solution in which the precursor is dissolved is evenly mixed with the carrier.

[0039] (4) Transfer the mixture in the beaker to an evaporating flask, and utilize a rotary evaporator for vacuum evaporation to remove so...

Embodiment 2

[0052] Embodiment 2, The adsorbents numbered 10-18 were prepared by solution immersion method.

[0053] Choose 20 grams of fiber activated carbon (cut into a square with a side length of 2 ± 0.5mm) as the carrier for preparing the adsorbent, and all the other preparation steps, process conditions and materials are the same as in Example 1, and the adsorbents numbered 10 to 18 are obtained successively. . According to the adsorbent prepared by the above-mentioned solution soaking method, the surface of the carrier activated carbon is adsorbed with -NH, -NH 2 and -NH 3 one or more of them.

Embodiment 3

[0054] Embodiment 3, The adsorbents numbered 19-27 were prepared by solution immersion method.

[0055] Replace 100mL of ethanol with 100mL of water, and select 10 grams of powdered activated carbon as the carrier for preparing the adsorbent. The drying condition is to dry in a drying oven at 110°C for 6 hours. The rest of the preparation steps, process conditions and materials are the same as in Example 1, and the numbers are obtained in turn. It is the adsorbent of 19-27. According to the adsorbent prepared by the above-mentioned solution soaking method, the surface of the carrier activated carbon is adsorbed with -NH, -NH 2 and -NH 3 one or more of them.

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Abstract

The invention discloses an adsorbent used for efficiently separating formaldehyde from air and a preparation method thereof. An adsorbent carrier is active carbon, the surface of which is attached with one or more of -NH, -NH2 and -NH3. The precursor of -NH, -NH2 and -NH3 is one of salvolatile, ammonium bicarbonate, ammonium sulfate, ammonium nitrate, ammonium chloride, ethene diamine, hexamethylenediamine, aniline and urea. The adsorbent can absorb and separate formaldehyde in air when space velocity is 20000-80000h<-1> at room temperature. Especially when the formaldehyde and benzene seriesin the air coexist, the adsorbent not only can absorb and separate formaldehyde but also can absorb and separate the benzene series. Therefore, the adsorbent can be widely applied to the purifying treatment of air in hermetic and semi-hermetic limited spaces, such as building interiors, spacecrafts, submarines, undergrounds and the like.

Description

technical field [0001] The invention belongs to the technical field of air purification treatment, and in particular relates to an adsorbent capable of efficiently separating formaldehyde from air without causing secondary pollution and a preparation method thereof. technical background [0002] Formaldehyde widely exists in the air environment, especially indoors of buildings, as well as airtight and semi-airtight cabins such as spacecraft, submarines, and subways. It is one of the most important air pollutants in limited space environments. The source of formaldehyde is more complex, mainly including urea-formaldehyde / phenolic resin glue wood-based panels, such as plywood, blockboard, medium density fiberboard and particle board; decorative materials containing formaldehyde, such as wallpaper, paint, adhesives, urea-formaldehyde foam insulation materials and Plastic flooring; indoor and cabin display and decoration products that emit formaldehyde, such as furniture, chemic...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/30B01D53/02
Inventor 朱天乐叶志红
Owner BEIHANG UNIV
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