Measurement and prediction of desorption behavior of five volatile organic compounds (acetone, n-hexane, methanol, toluene, and n-decane) from activated carbon for supercritical carbon dioxide regeneration

Naoto Takahashi, Ikuo Ushiki, Yuri Hamabe, Masaki Ota, Yoshiyuki Sato, Hiroshi Inomata

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

Measurement and prediction of desorption behavior of five volatile organic compounds (VOCs) (acetone, n-hexane, methanol, toluene, and n-decane) from activated carbon by using supercritical carbon dioxide regeneration were studied. Measurements of the desorption behavior were performed with a fixed bed method at temperatures from 313 to 353 K and pressures from 10.0 to 15.0 MPa. The measured desorption rates varied greatly for each VOC, which could be attributed to differences in two properties, affinity of VOCs for activated carbon and the volatility of VOCs. The measured desorption rates increased with increasing pressure and decreasing temperature, which could be explained by increasing CO2 density. A kinetic model was applied to correlate the desorption behavior. The model demonstrated satisfactory correlations of the desorption behavior with only one fitting parameter. Generalization of the fitting parameter to predict the desorption behavior were also investigated. The proposed prediction model could roughly represent the desorption behavior of VOCs over a wide range of supercritical carbon dioxide conditions.

Original languageEnglish
Pages (from-to)226-233
Number of pages8
JournalJournal of Supercritical Fluids
Volume107
DOIs
Publication statusPublished - 2016 Jan 1

Keywords

  • Activated carbon
  • Carbon dioxide
  • Correlation
  • Desorption
  • Kinetic model
  • Prediction
  • Supercritical fluids
  • Volatile organic compounds (VOCs)

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

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