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Process for preparing activated carbon fibres to remove aldehyde-containing gas

An activated carbon fiber, removal technology, applied in separation methods, chemical instruments and methods, and other chemical processes, can solve the problems of low adsorption capacity, poor adsorption and removal performance, etc., and achieve simple preparation, easy operation, and dealdehyde effect Good results

Inactive Publication Date: 2002-12-25
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conventional activated carbon fiber is a microporous, non-polar carbon adsorbent, but the disadvantage is that activated carbon fiber has poor adsorption and removal performance on formaldehyde and other polar organic compounds, and its adsorption capacity is low.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The polyacrylonitrile activated carbon fiber is dried at 100°C, then immersed in 0.01mol / l p-aminobenzenesulfonic acid solution for 24 hours, taken out and extruded, air-dried, and then dried at 100°C in the air atmosphere to obtain dealdehyde Material. Performance test: use 2g of this material to treat aldehyde-containing gas at room temperature, the inlet concentration of formaldehyde is 5ppm, and the inlet concentration of water vapor is 10ppm (nitrogen + air + formaldehyde + water vapor, the flow rate is 10ml / min). Breakthrough time (breakthrough time when the outlet concentration is 5% of the inlet concentration) is 12 minutes for water vapor and 6 hours for formaldehyde.

Embodiment 2

[0016] Viscose-based activated carbon fibers were dried at 105°C, then immersed in 0.1mol / l p-aminobenzoic acid solution for 20 hours, taken out and extruded, air-dried, and then dried at 105°C in an air atmosphere to obtain a dealdehyde material . Performance test: 3g of this material is used to treat aldehyde-containing gas at room temperature, the inlet concentration of formaldehyde is 10ppm, and the inlet concentration of water vapor is 100ppm (nitrogen + air + formaldehyde + water vapor, the flow rate is 12ml / min). Breakthrough time (breakthrough time when the outlet concentration is 5% of the inlet concentration) is 18 minutes for water vapor and 12 hours for formaldehyde.

Embodiment 3

[0018] Pitch-based activated carbon fibers were dried at 110°C, then immersed in a 0.2mol / l solution of p-aminobenzenesulfonic acid for 12 hours, taken out and extruded, air-dried, and then dried at 110°C in an air atmosphere to obtain dealdehyde Material. Performance test: 5g of this material is used to treat aldehyde-containing gas at room temperature, the inlet concentration of formaldehyde is 15ppm, and the inlet concentration of water vapor is 150ppm (nitrogen + air + formaldehyde + water vapor, the flow rate is 15ml / min). Breakthrough time (breakthrough time when the outlet concentration is 5% of the inlet concentration) is 15 minutes for water vapor and 9 hours for formaldehyde.

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PUM

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Abstract

An activated carbon fibre for removing aldehyde-contained gas is prepared from the ordinary activated carbon fibres through drying at 100-150 deg.C, impregnating in the solution of amino group containing hydrophilic organic compound for 0.5-24 hr, drying in air and drying at 100-150 deg.C. Its advantages are high effect and no pollution.

Description

Technical field: [0001] The invention belongs to a method for preparing a material for removing volatile organic compounds (VOC), in particular to a method for preparing an activated carbon fiber for removing aldehyde-containing gas. Background technique: [0002] In recent years, the seriousness of indoor air pollution has aroused people's attention day by day. Formaldehyde and other aldehydes are common indoor air pollutants, and formaldehyde pollution has become an important factor in indoor pollution. Formaldehyde is a kind of primary poison, and formaldehyde in the air can cause obvious irritation to eyes, nose, throat, skin, etc. Formaldehyde is also a volatile organic compound (VOC-Volatile Organic Compound). Therefore, the control of formaldehyde pollution has become a major part of the control of indoor VOC pollution. In order to fundamentally solve the pollution caused by volatile organic compounds such as formaldehyde, the method of adsorption is commonly used....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/04B01J20/20B01J20/32
Inventor 郑经堂荣海琴刘振宇刘平光曹雅秀
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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