Sorption Equilibria and Kinetics of CO2, N2, and H2O on KOH-Treated Activated Carbon

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

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The equilibria and kinetics of CO2, N2, and H2O 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 CO2 capture (15 vol % CO2, 4 vol % H2O, and balanced N2) was simulated by the ideal adsorption solution theory, the adsorbed amount of H2O was much higher than those of CO2 and N2. The adsorption amount of CO2 dropped when H2O was present. The CO2 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 H2O > CO2 > N2. Understanding the adsorption behaviors of flue gas including H2O is important in designing adsorptive CO2 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

Fingerprint

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

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 CO2, N2, and H2O on KOH-Treated Activated Carbon. In: Industrial and Engineering Chemistry Research. 2018 ; Vol. 57, No. 50. pp. 17218-17225.
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abstract = "The equilibria and kinetics of CO2, N2, and H2O 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 CO2 capture (15 vol {\%} CO2, 4 vol {\%} H2O, and balanced N2) was simulated by the ideal adsorption solution theory, the adsorbed amount of H2O was much higher than those of CO2 and N2. The adsorption amount of CO2 dropped when H2O was present. The CO2 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 H2O > CO2 > N2. Understanding the adsorption behaviors of flue gas including H2O is important in designing adsorptive CO2 capture processes using KOH-AC.",
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Sorption Equilibria and Kinetics of CO2, N2, and H2O 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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