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Feasibility of regenerative adsorption of a hydrofluorocarbon (HFC-134a) using activated carbon fiber studied by the gaseous flow method.

Authors
  • Guahk, Young Tae1
  • Jeon, Minwook1
  • Moon, Seunghyun1
  • Ohm, Taein2
  • Kim, Seung Gon3
  • 1 Korea Institute of Energy Research, 152 Gajeong-ro, Yuseong-gu, Daejeon 34129, Republic of Korea. , (North Korea)
  • 2 Hanbat National University, 125 Dongseodae-ro, Yuseong-gu, Daejeon 34158, Republic of Korea. , (North Korea)
  • 3 Korea Institute of Energy Research, 152 Gajeong-ro, Yuseong-gu, Daejeon 34129, Republic of Korea. Electronic address: [email protected] , (North Korea)
Type
Published Article
Journal
Journal of hazardous materials
Publication Date
Jan 04, 2021
Volume
411
Pages
125009–125009
Identifiers
DOI: 10.1016/j.jhazmat.2020.125009
PMID: 33453670
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

The adsorption and desorption behavior of the refrigerant HFC-134a on pitch-based activated carbon fibers (ACFs) with various Brunauer-Emmett-Teller surface areas was investigated by the flow method. Fixed-bed adsorption experiments performed at 20, 5, -15, -20, and -25 °C showed that the use of lower temperatures resulted in an increase in the adsorption capacity of the ACF. In particular, the complete adsorption time was dramatically increased at -25 °C. Crucially, even after five cycles of adsorption at -20 °C and desorption at 30 °C of HFC-134a in a electrothermal swing adsorption apparatus, significant decreases in the adsorption capability were not observed. The desorption of HFC-134a from saturated ACF was carried out using electric power directly applied to the ACF itself. The electric heating increased the ACF temperature, causing desorption within several minutes. The results of this study show that the regenerative adsorption of HFC-134a by ACF coupled with electric power is possible. Copyright © 2021 Elsevier B.V. All rights reserved.

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