NDLI: Improving the pore structure and adsorption properties of industrial active carbons

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Improving the pore structure and adsorption properties of industrial active carbons

Catalysis in Industry : Volume 4, Issue 1, March 2012

Catalysis in Industry : Volume 3

Catalysis in Industry : Volume 2

Catalysis in Industry : Volume 1

Improving the pore structure and adsorption properties of industrial active carbons

Content Provider	Springer Nature Link
Author	Astrakova, T. V.
Copyright Year	2012
Abstract	The paper describes the possibility of improving the pore structure and adsorption properties of industrial active carbons (AC) by means of their modification with ɛ-caprolactam (CL). Application of ɛ-caprolactam (a product of large-scale organic synthesis) as a modifying substance allows the targeted regulation of the specific surface area and volume of AC mesopores, while the conditions of modification change the chemical composition of the surface of carbon adsorbents and, as a result, their adsorption properties. The process of modification includes three stages. The first is the adsorption of CL from aqueous solution and heating at 300°C in the presence of atmospheric oxygen. The second is carbonization in an argon flow at 900°C, and the third is the vapor-gas activation of the resultant adsorbents at 900°C. Each stage is followed by determining the parameters of the pore structure by N$_{2}$ adsorption and the adsorption parameters with respect to benzene, iodine, aqueous solutions of ɛ-caprolactam, and copper sulfate (CuSO$_{4}$). When modifying the carbonized samples with an initial ɛ-caprolactam content of 2%, we observe the growth of mesopores over 100% of volume, relative to AG-OV-1 original industrial activated carbon. Depending on the stage of modification, an increase in adsorption is observed, relative to the AG-OV-1 original carbon: benzene adsorption rises by 50%, the adsorption of iodine from aqueous solution rises by 20%, the adsorption of ɛ-caprolactam from aqueous solution grows by more than 30%, and the adsorption of copper(II) ions rises by more than 70%. The procedure for the production of the described modified adsorbent has no rivals abroad; it is protected by a patent and can be used in industry. It is possible to use inexpensive industrial carbons as the original material. The procedure allows the production of carbon adsorbents with predetermined structural and adsorption properties.
Starting Page	150
Ending Page	154
Page Count	5
File Format	PDF
ISSN	20700504
Journal	Catalysis in Industry
Volume Number	4
Issue Number	2
e-ISSN	20700555
Language	English
Publisher	SP MAIK Nauka/Interperiodica
Publisher Date	2012-06-27
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Carbon adsorbents modification ɛ-caprolactam pore structure adsorption Catalysis
Content Type	Text
Resource Type	Article
Subject	Catalysis

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