Sorption Equilibria and Kinetics of CO 2 , N 2 , and H 2 O on KOH-Treated Activated Carbon

Lei Liu, Seongmin Jin, Yongha Park, Young Cheol Park, Chang Ha Lee

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The equilibria and kinetics of CO 2 , N 2 , and H 2 O on KOH-treated activated carbon (KOH-AC) were evaluated. The isotherms for the pure components were correlated with the Langmuir, dual-site Langmuir, Sips, and Brunauer-Emmett-Teller models. The saturated adsorption amounts followed the order qH2O > qCO2 ≫ qN2. When simulated gas composition of postcombustion CO 2 capture (15 vol % CO 2 , 4 vol % H 2 O, and balanced N 2 ) was simulated by the ideal adsorption solution theory, the adsorbed amount of H 2 O was much higher than those of CO 2 and N 2 . The adsorption amount of CO 2 dropped when H 2 O was present. The CO 2 uptake curves were well correlated with a nonisothermal kinetic model because the adsorption kinetics were controlled via heat generation and transfer. At the same temperature and pressure, the adsorption rates followed the order H 2 O > CO 2 > N 2 . Understanding the adsorption behaviors of flue gas including H 2 O is important in designing adsorptive CO 2 capture processes using KOH-AC.

Original languageEnglish
Pages (from-to)17218-17225
Number of pages8
JournalIndustrial and Engineering Chemistry Research
Volume57
Issue number50
DOIs
Publication statusPublished - 2018 Dec 19

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Carbon Monoxide
Activated carbon
Sorption
Adsorption
Kinetics
Heat generation
Flue gases
Isotherms
Heat transfer
Gases
Chemical analysis

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

Cite this

Liu, Lei ; Jin, Seongmin ; Park, Yongha ; Park, Young Cheol ; Lee, Chang Ha. / Sorption Equilibria and Kinetics of CO 2 , N 2 , and H 2 O on KOH-Treated Activated Carbon In: Industrial and Engineering Chemistry Research. 2018 ; Vol. 57, No. 50. pp. 17218-17225.
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Sorption Equilibria and Kinetics of CO 2 , N 2 , and H 2 O on KOH-Treated Activated Carbon . / Liu, Lei; Jin, Seongmin; Park, Yongha; Park, Young Cheol; Lee, Chang Ha.

In: Industrial and Engineering Chemistry Research, Vol. 57, No. 50, 19.12.2018, p. 17218-17225.

Research output: Contribution to journalArticle

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