Please use this identifier to cite or link to this item: https://doi.org/10.1039/c1cp20383e
Title: A method for the calculation of the adsorbed phase volume and pseudo-saturation pressure from adsorption isotherm data on activated carbon
Authors: Srinivasan, K. 
Saha, B.B.
Ng, K.C. 
Dutta, P.
Prasad, M.
Issue Date: 21-Jul-2011
Source: Srinivasan, K., Saha, B.B., Ng, K.C., Dutta, P., Prasad, M. (2011-07-21). A method for the calculation of the adsorbed phase volume and pseudo-saturation pressure from adsorption isotherm data on activated carbon. Physical Chemistry Chemical Physics 13 (27) : 12559-12570. ScholarBank@NUS Repository. https://doi.org/10.1039/c1cp20383e
Abstract: We propose a new method for evaluating the adsorbed phase volume during physisorption of several gases on activated carbon specimens. We treat the adsorbed phase as another equilibrium phase which satisfies the Gibbs equation and hence assume that the law of rectilinear diameters is applicable. Since invariably the bulk gas phase densities are known along measured isotherms, the constants of the adsorbed phase volume can be regressed from the experimental data. We take the Dubinin-Astakhov isotherm as the model for verifying our hypothesis since it is one of the few equations that accounts for adsorbed phase volume changes. In addition, the pseudo-saturation pressure in the supercritical region is calculated by letting the index of the temperature term in Dubinin's equation to be temperature dependent. Based on over 50 combinations of activated carbons and adsorbates (nitrogen, oxygen, argon, carbon dioxide, hydrocarbons and halocarbon refrigerants) it is observed that the proposed changes fit experimental data quite well. © the Owner Societies 2011.
Source Title: Physical Chemistry Chemical Physics
URI: http://scholarbank.nus.edu.sg/handle/10635/54360
ISSN: 14639076
DOI: 10.1039/c1cp20383e
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

17
checked on Dec 14, 2017

WEB OF SCIENCETM
Citations

16
checked on Nov 18, 2017

Page view(s)

48
checked on Dec 10, 2017

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.