Carbon dioxide adsorption isotherms on activated carbons

Bidyut Baran Saha, Skander Jribi, Shigeru Koyama, Ibrahim I. El-Sharkawy

Research output: Contribution to journalArticle

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Abstract

This paper presents adsorption isotherm data of CO2 onto two different types of highly porous activated carbons (ACs) for temperatures ranging from (-18 to 80) °C and pressures up to 10 MPa. The assorted adsorbents are activated carbon fiber (ACF) of type A-20 and activated carbon powder of type Maxsorb III. Adsorption isotherm data have been obtained using a volumetric technique and fitted to the Dubinin-Astakhov (D-A), Tóth, Langmuir, and modified D-A equations. The latter considers the pseudosaturation pressure of CO2 that plays an important role for supercritical gas adsorption, and the pseudosaturation pressure was determined from the experimental data. The Tóth and modified D-A isotherms correlate with the experimental data within 5 % root-mean-square deviation (rmsd) and present a better fitting than that of the Langmuir and the D-A equations. The isosteric heat of adsorption data were derived from the Tóth and modified D-A isotherm equations and the correlation proposed by Chakraborty et al., and the average heat of adsorption values were found to be comparable. These data are essential for designing CO2-based adsorption cooling, refrigeration, and gas storage systems.

Original languageEnglish
Pages (from-to)1974-1981
Number of pages8
JournalJournal of Chemical and Engineering Data
Volume56
Issue number5
DOIs
Publication statusPublished - May 12 2011

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Adsorption isotherms
Carbon Dioxide
Activated carbon
Carbon dioxide
Adsorption
Isotherms
Gas adsorption
Refrigeration
Powders
Adsorbents
Carbon fibers
Cooling
Temperature
Hot Temperature

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

Carbon dioxide adsorption isotherms on activated carbons. / Saha, Bidyut Baran; Jribi, Skander; Koyama, Shigeru; El-Sharkawy, Ibrahim I.

In: Journal of Chemical and Engineering Data, Vol. 56, No. 5, 12.05.2011, p. 1974-1981.

Research output: Contribution to journalArticle

Saha, Bidyut Baran ; Jribi, Skander ; Koyama, Shigeru ; El-Sharkawy, Ibrahim I. / Carbon dioxide adsorption isotherms on activated carbons. In: Journal of Chemical and Engineering Data. 2011 ; Vol. 56, No. 5. pp. 1974-1981.
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