TY - JOUR
T1 - Theoretical Insight of Physical Adsorption for a Single Component Adsorbent + Adsorbate System: II. The Henry Region
AU - Chakraborty, Anutosh
AU - Saha, Bidyut Baran
AU - Ng, Kim Choon
AU - Koyama, Shigeru
AU - Srinivasan, Kandadai
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledged KAUST grant number(s): WBS R265-000-286-597
Acknowledgements: The authors wish to thank King Abdullah University of Science & Technology (KAUST) for the generous financial support through the project (WBS R265-000-286-597).
This publication acknowledges KAUST support, but has no KAUST affiliated authors.
PY - 2009/7/7
Y1 - 2009/7/7
N2 - The Henry coefficients of a single component adsorbent + adsorbate system are calculated from experimentally measured adsorption isotherm data, from which the heat of adsorption at zero coverage is evaluated. The first part of the papers relates to the development of thermodynamic property surfaces for a single-component adsorbent + adsorbate system1 (Chakraborty, A.; Saha, B. B.; Ng, K. C.; Koyama, S.; Srinivasan, K. Langmuir 2009, 25, 2204). A thermodynamic framework is presented to capture the relationship between the specific surface area (Ai) and the energy factor, and the surface structural and the surface energy heterogeneity distribution factors are analyzed. Using the outlined approach, the maximum possible amount of adsorbate uptake has been evaluated and compared with experimental data. It is found that the adsorbents with higher specific surface areas tend to possess lower heat of adsorption (ΔH°) at the Henry regime. In this paper, we have established the definitive relation between Ai and ΔH° for (i) carbonaceous materials, metal organic frameworks (MOFs), carbon nanotubes, zeolites + hydrogen, and (ii) activated carbons + methane systems. The proposed theoretical framework of At and AH0 provides valuable guides for researchers in developing advanced porous adsorbents for methane and hydrogen uptake. © 2009 American Chemical Society.
AB - The Henry coefficients of a single component adsorbent + adsorbate system are calculated from experimentally measured adsorption isotherm data, from which the heat of adsorption at zero coverage is evaluated. The first part of the papers relates to the development of thermodynamic property surfaces for a single-component adsorbent + adsorbate system1 (Chakraborty, A.; Saha, B. B.; Ng, K. C.; Koyama, S.; Srinivasan, K. Langmuir 2009, 25, 2204). A thermodynamic framework is presented to capture the relationship between the specific surface area (Ai) and the energy factor, and the surface structural and the surface energy heterogeneity distribution factors are analyzed. Using the outlined approach, the maximum possible amount of adsorbate uptake has been evaluated and compared with experimental data. It is found that the adsorbents with higher specific surface areas tend to possess lower heat of adsorption (ΔH°) at the Henry regime. In this paper, we have established the definitive relation between Ai and ΔH° for (i) carbonaceous materials, metal organic frameworks (MOFs), carbon nanotubes, zeolites + hydrogen, and (ii) activated carbons + methane systems. The proposed theoretical framework of At and AH0 provides valuable guides for researchers in developing advanced porous adsorbents for methane and hydrogen uptake. © 2009 American Chemical Society.
UR - http://hdl.handle.net/10754/599981
UR - https://pubs.acs.org/doi/10.1021/la900217t
UR - http://www.scopus.com/inward/record.url?scp=67650047268&partnerID=8YFLogxK
U2 - 10.1021/la900217t
DO - 10.1021/la900217t
M3 - Article
C2 - 19469548
SN - 0743-7463
VL - 25
SP - 7359
EP - 7367
JO - Langmuir
JF - Langmuir
IS - 13
ER -