Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/83335
Title: Benzene Adsorption from Dry and Humid Air on Activated Carbons from Japanese Cypress Wood Prepared by CO2 and K2CO3 Activation
Authors: Veksha, Andrei
Uddin, Md. Azhar
Sasaoka, Eiji
Kato, Yoshiei
Keywords: Activated carbon
Benzene adsorption
Issue Date: 2012
Source: Veksha, A., Uddin, M. A., Sasaoka, E., & Kato, Y. (2012). Benzene Adsorption from Dry and Humid Air on Activated Carbons from Japanese Cypress Wood Prepared by CO2 and K2CO3 Activation. International Journal of Chemical Engineering and Applications, 3(1), 1-5.
Series/Report no.: International Journal of Chemical Engineering and Applications
Abstract: Activated carbons (ACs) were prepared by physical (CO2) and chemical (K2CO3) activation of wood (Japanese cypress). Porous properties of the ACs, such as BET surface area and micropore volumes Vmic(N2) and Vmic(CO2), were characterized by N2 and CO2 adsorption isotherms. Short activation times caused formation of micropores with sizes smaller than 0.7 nm, which had a restricted access for N2 molecules. As a result, the ACs prepared through short activation time exhibited Vmic(N2) smaller than Vmic(CO2). The ACs were used for benzene adsorption at 5 ppmv concentration and relative humidities (RHs) of 0, 50 and 70 %. The largest benzene adsorption capacities at these RHs were exhibited by the AC prepared with K2CO3 activation at 800 °C. At RH 0 %, the benzene adsorption on the ACs was governed by Vmic(N2), when it was smaller than Vmic(CO2), and by Vmic(CO2), when it was smaller than Vmic(N2). The lower determination coefficients for the relationship between benzene uptake by the ACs and the volume of micropores at RHs 50 and 70 % compared to RH 0 % were attributed to the increased influence of surface chemistry of the ACs in the presence of moisture. In particular, the benzene adsorption at RHs 50 and 70 % was detrimentally affected by larger amounts of ash and surface oxygen groups.
URI: https://hdl.handle.net/10356/83335
http://hdl.handle.net/10220/42518
ISSN: 2010-0221
DOI: 10.7763/IJCEA.2012.V3.149
Rights: © 2012 International Journal of Chemical Engineering and Applications (IJCEA). This paper was published in International Journal of Chemical Engineering and Applications and is made available as an electronic reprint (preprint) with permission of International Journal of Chemical Engineering and Applications (IJCEA). The published version is available at: [http://doi.org/10.7763/IJCEA.2012.V3.149]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:NEWRI Journal Articles

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