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Carbon Letters

, Volume 29, Issue 6, pp 649–654 | Cite as

Determination of the optimum porosity for 2-CEES adsorption by activated carbon fiber from various precursors

  • Hye-Min Lee
  • Byeong-Hoon Lee
  • Ju-Hwan Kim
  • Kay-Hyeok AnEmail author
  • Soo-Jin ParkEmail author
  • Byung-Joo KimEmail author
Rapid Communications
  • 37 Downloads

Abstract

In this study, we prepared ACFs with a high specific surface area from various precursors (rayon, pitch, and oxidized polyacrylonitrile-based fibers) by a steam-activation technique and investigated the effects of the micropore and mesopore fraction on 2-CEES adsorption behaviors. The activation time was precisely controlled so that the activation yield was in the range of 35–40% to ensure the mechanical properties of the ACFs. The N2 adsorption isotherm characteristics at 77K were confirmed by Brunauer–Emmett–Teller, Barrett–Joyner–Halenda and non-local density functional theory equations. The adsorption capacities of the ACF were measured by breakthrough experiments in the gas phase (750 μg/mL of 2-CEES in N2 flow). The removal efficiency of the ACFs was evaluated and compared with that of AC. From the results, specific surface areas and total pore volume of the ACF were determined to be 1380–1670 m2/g and 0.61–0.82 cm3/g, respectively. It was also observed that various pore characteristics of ACF were found to be dependent on crystallite structure of each precursor. The break through time (C/C0 = 0.10) was in the order of Oxi-Pan-H-9-2 < Saratoga AC < Rayon-H-9-3 < Pitch-H-9-4. This indicates that 2-CEES adsorption capacity could be a function not only of specific surface area or total pore volume, but also of sub-mesopore volume fraction in the range of 1.5–2.5 nm of adsorbents.

Keywords

Activated carbon fiber Physical activation 2-CEES Chemical warfare agent 

Notes

Acknowledgements

This research was supported by the “A Study on the Design of Protective Woven Fabrics Using ACF Materials” funded by the Agency for Defense Development, Republic of Korea (UD170102ID). This research was supported by Nano Material Technology Development Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science and ICT (Project no. 2018M3A7B9086636).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Supplementary material

42823_2019_80_MOESM1_ESM.docx (125 kb)
Supplementary material 1 (DOCX 124 kb)

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Copyright information

© Korean Carbon Society 2019

Authors and Affiliations

  1. 1.Research Center for Carbon Convergence MaterialsKorea Institute of Carbon Convergence TechnologyJeonjuRepublic of Korea
  2. 2.Department of ChemistryInha UniversityIncheonRepublic of Korea
  3. 3.Department of Chemical EngineeringChonbuk National UniversityJeonjuRepublic of Korea
  4. 4.Department of Carbon and Nano Materials EngineeringJeonju UniversityJeonjuRepublic of Korea

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