Isotherms and thermodynamics for the adsorption of n-butane on pitch based activated carbon

Bidyut Baran Saha*, Anutosh Chakraborty, Shigeru Koyama, Seong Ho Yoon, Isao Mochida, M. Kumja, Christopher Yap, Kim Choon NG

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

58 Scopus citations

Abstract

The adsorption isotherms of n-butane on pitch based activated carbon (type Maxsorb III) at temperatures ranging from 298 to 328 K and at different equilibrium pressures between 20 and 300 kPa have been experimentally measured by a volumetric technique. The porous properties such as, the density, Brunauer-Emmett-Teller (BET) surface area, pore size, pore volume along with pore size distribution (PSD) of Maxsorb III have been determined. The Dubinin-Astakhov (DA) adsorption isotherm model describes all of the isotherm experimental data within the acceptable error ranges. The present isotherm data are compared with other published data of activated carbon (AC)/n-butane and showed the superiority of the present findings in terms of uptake capacity. The isosteric heat of adsorption (ΔHads) of n-butane on Maxsorb III is calculated for different loading. Using the adsorption isotherms and ΔHads, the thermodynamic property maps as a function of pressure, temperature and adsorbate amount are also presented.

Original languageEnglish (US)
Pages (from-to)1582-1589
Number of pages8
JournalInternational Journal of Heat and Mass Transfer
Volume51
Issue number7-8
DOIs
StatePublished - Apr 1 2008

Keywords

  • Activated carbon
  • Adsorption
  • Heat of adsorption
  • Thermodynamic property fields
  • n-Butane

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes
  • Energy(all)
  • Mechanical Engineering

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