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Effect of Surface Treatment by O 3 and Chemical Activation by Alkali Metal on the Performance of ACFs on Adsorption and Desorption of BTX Gases

Author

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  • Jung Hee Jang

    (Department of Applied Environmental Science, Graduate School, Kyung Hee University, Yongin-si, Gyeonggi-do 17104, Korea)

  • Gi Bo Han

    (Plant Engineering Center, Institute for Advanced Engineering, 633-2 Goan-ri, Baegam-myon, Cheoin-gu, Yongin-si, Gyeonggi-do 17528, Korea)

Abstract

In order to investigate the adsorption characteristics of activated carbon fibers (ACFs) with improved surface morphologies towards volatile organic compounds (VOCs), a commercial low-grade ACF was surface modified by successive surface treatment (ST) and chemical activation (CA) process. O 3 was used as an ST agent for the formation of oxygen-containing functional groups on the carbon matrix of ACFs. CA was carried out after ST, using a KOH solution. After the successive ST-CA process, Brunauer-Emmett-Teller (BET) surface area and average pore diameter of ACFs were increased from 1483 m 2 /g to 2743 m 2 /g and enlarged from 1.931 nm to 2.512 nm, respectively. The successive ST-CA process also resulted in the adsorption capacities of benzene, toluene, and xylene of the ACFs to increase from 0.22 g −Ben. /g −ACFs , 0.18 g −Tol. /g −ACFs , and 0.19 g −Xyl /g −ACFs up to 0.37 g −Ben. /g −ACFs , 0.35 g −Tol. /g −ACFs , and 0.38 g −Xyl /g −ACFs , respectively.

Suggested Citation

  • Jung Hee Jang & Gi Bo Han, 2020. "Effect of Surface Treatment by O 3 and Chemical Activation by Alkali Metal on the Performance of ACFs on Adsorption and Desorption of BTX Gases," IJERPH, MDPI, vol. 17(15), pages 1-12, July.
    • Handle: RePEc:gam:jijerp:v:17:y:2020:i:15:p:5422-:d:390852
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    References listed on IDEAS

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    1. Małgorzata Okrasa & Jörn Hitz & Aleksandra Nowak & Agnieszka Brochocka & Christoph Thelen & Zbigniew Walczak, 2019. "Adsorption Performance of Activated-Carbon-Loaded Nonwoven Filters Used in Filtering Facepiece Respirators," IJERPH, MDPI, vol. 16(11), pages 1-16, June.
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