Adsorption kinetics of CO2, CO, N2 and CH4 on zeolite LiX pellet and activated carbon granule

Youngsan Ju, Yongha Park, Dooyoung Park, Jae Jeong Kim, Chang Ha Lee

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

The adsorption uptake curves of CO2, CO, N2 and CH4 on zeolite LiX and activated carbon were measured using a volumetric method at 293, 308 and 323 K and pressure up to 100 kPa. The experimental uptake curves were correlated with a non-isothermal kinetic model because the adsorption kinetics was controlled by heat generation and transfer, and an isothermal model showed large deviation from experimental uptake. The adsorption rates of the gases on zeolite LiX and activated carbon were affected by the isosteric heat of adsorption, heat transfer rate and adsorption affinity. At the same pressure and temperature, the sequence of effective diffusion time constants was CO2 ≪ CO < N2 < CH4 for zeolite LiX and CO2 ≪ CH4 ≤ N2 < CO for activated carbon. The adsorption rate of CO showed the largest difference between the two adsorbents. Effective diffusion time constants (D/R2) for all cases were provided, which depended on pressure and temperature.

Original languageEnglish
Pages (from-to)419-432
Number of pages14
JournalAdsorption
Volume21
Issue number5
DOIs
Publication statusPublished - 2015 Jul 23

Fingerprint

Zeolites
activated carbon
Carbon Monoxide
pellets
Activated carbon
Adsorption
Kinetics
adsorption
carbon
kinetics
time constant
heat transfer
Heat transfer
heat generation
Heat generation
curves
adsorbents
Adsorbents
affinity
Gases

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Surfaces and Interfaces

Cite this

Ju, Youngsan ; Park, Yongha ; Park, Dooyoung ; Kim, Jae Jeong ; Lee, Chang Ha. / Adsorption kinetics of CO2, CO, N2 and CH4 on zeolite LiX pellet and activated carbon granule. In: Adsorption. 2015 ; Vol. 21, No. 5. pp. 419-432.
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Adsorption kinetics of CO2, CO, N2 and CH4 on zeolite LiX pellet and activated carbon granule. / Ju, Youngsan; Park, Yongha; Park, Dooyoung; Kim, Jae Jeong; Lee, Chang Ha.

In: Adsorption, Vol. 21, No. 5, 23.07.2015, p. 419-432.

Research output: Contribution to journalArticle

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AB - The adsorption uptake curves of CO2, CO, N2 and CH4 on zeolite LiX and activated carbon were measured using a volumetric method at 293, 308 and 323 K and pressure up to 100 kPa. The experimental uptake curves were correlated with a non-isothermal kinetic model because the adsorption kinetics was controlled by heat generation and transfer, and an isothermal model showed large deviation from experimental uptake. The adsorption rates of the gases on zeolite LiX and activated carbon were affected by the isosteric heat of adsorption, heat transfer rate and adsorption affinity. At the same pressure and temperature, the sequence of effective diffusion time constants was CO2 ≪ CO < N2 < CH4 for zeolite LiX and CO2 ≪ CH4 ≤ N2 < CO for activated carbon. The adsorption rate of CO showed the largest difference between the two adsorbents. Effective diffusion time constants (D/R2) for all cases were provided, which depended on pressure and temperature.

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