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An activated carbon adsorbent for separating formaldehyde from air

A technology of activated carbon adsorption and activated carbon, which is applied in the field of indoor air purification, can solve the problems of insufficient purification effect, achieve fast decomposition speed, strong catalytic oxidation ability, and increase contact effect

Inactive Publication Date: 2018-05-08
上海源述基因科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are currently some modified activated carbons on the market for purifying formaldehyde, such as sodium thiosulfate, potassium permanganate and other modified activated carbon adsorbents, although the performance of ordinary activated carbon adsorbents can be improved by 1 to 2 times, but still up to Less than expected purification effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Preparation of modified activated carbon support

[0021] Remove impurities from anthracite and crush it into particles with a particle size of 0.01-0.1mm; add polymethacrylate to stir and shape, calcinate at 120°C for 10h, calcinate at 800°C for 12h, activate at 800°C and steam for 24h, Promptly obtain the activated carbon carrier; sodium carbonate and sodium nitrate prepare an aqueous solution with a mass concentration of 20% according to the ratio of 2:1, soak the activated carbon in the step aqueous solution for 10 h, dry at 120 ° C for 3 h, activate in supercritical water for 1 h, and pickling, water washing, and drying to obtain a modified activated carbon carrier.

[0022] Preparation of activated carbon adsorbent

[0023] Prepare an aqueous solution of potassium permanganate and zinc nitrate, immerse the modified activated carbon in the aqueous solution for 1 hour, dry it for 2 hours, and then calcinate it at 500°C for 6 hours; immerse the activated carbon impr...

Embodiment 2

[0025] Preparation of modified activated carbon support

[0026] Adopt coal-based activated carbon with a loss-on-ignition rate of 30%; sodium carbonate and sodium nitrate prepare an aqueous solution with a mass concentration of 25% according to a ratio of 5: 1, soak the activated carbon in the aqueous solution for 10 h, dry at 150° C. for 2 h, and Activation in critical water for 3 hours, pickling and water washing at room temperature, and drying to obtain a modified activated carbon carrier.

[0027] Preparation of activated carbon adsorbent

[0028] Prepare an aqueous solution of potassium permanganate and zinc nitrate, immerse the modified activated carbon in the aqueous solution for 2 hours, dry for 1 hour, and then calcinate at 500°C for 6 hours; impregnate the activated carbon impregnated with the active metal in the aqueous solution of polyene polyamine 2h, after drying at 120°C for 5h, the activated carbon adsorbent product was obtained.

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Abstract

The invention discloses an activated carbon adsorbent for separating formaldehyde from air. The activated carbon adsorbent disclosed by the invention has good adsorption and oxidative decomposition capabilities for formaldehyde and various small molecular organic substances. The present invention modifies the activated carbon carrier, and expands the number of mesopores in the activated carbon through the steps of additive impregnation, activation, pickling, etc., which is more conducive to the loading of the activated carbon on the metal oxide catalyst, improves the specific surface area, and increases the metal The contact between the oxide catalyst and formaldehyde improves the decomposition rate of formaldehyde and prolongs the service life of the activated carbon adsorbent.

Description

technical field [0001] The invention relates to an adsorption material capable of adsorbing and decomposing formaldehyde and a method for removing formaldehyde pollutants in indoor air, belonging to the technical field of indoor air purification. Background technique [0002] Formaldehyde is one of the main air pollutants produced by interior decoration, and its sources are diverse, mainly including various adhesives, various synthetic boards, wallpapers, paints, foam materials, chemical fiber products, etc. Formaldehyde has a huge impact on human health. Formaldehyde in the indoor environment will be released slowly. Some poor-quality building materials release formaldehyde pollutants for as long as two years. Long-term exposure to formaldehyde can cause chronic respiratory diseases, headaches, and memory loss. decline and other symptoms. [0003] There are many ways to purify formaldehyde, mainly including physical adsorption and chemical degradation. Chemical degradation...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/22B01J20/30B01J31/26B01J31/32B01J31/38B01D53/86B01D53/72
Inventor 曹小娟
Owner 上海源述基因科技有限公司
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