Theoretical Insight of Physical Adsorption for a Single Component Adsorbent + Adsorbate System: II. The Henry Region
KAUST Grant NumberWBS R265-000-286-597
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AbstractThe 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.
CitationChakraborty A, Saha BB, Ng KC, Koyama S, Srinivasan K (2009) Theoretical Insight of Physical Adsorption for a Single Component Adsorbent + Adsorbate System: II. The Henry Region. Langmuir 25: 7359–7367. Available: http://dx.doi.org/10.1021/la900217t.
SponsorsThe authors wish to thank King Abdullah University of Science & Technology (KAUST) for the generous financial support through the project (WBS R265-000-286-597).
PublisherAmerican Chemical Society (ACS)
CollectionsPublications Acknowledging KAUST Support
- Theoretical insight of physical adsorption for a single-component adsorbent+adsorbate system: I. Thermodynamic property surfaces.
- Authors: Chakraborty A, Saha BB, Ng KC, Koyama S, Srinivasan K
- Issue date: 2009 Feb 17
- Hydrogen adsorption on functionalized nanoporous activated carbons.
- Authors: Zhao XB, Xiao B, Fletcher AJ, Thomas KM
- Issue date: 2005 May 12
- Surface interactions and quantum kinetic molecular sieving for H2 and D2 adsorption on a mixed metal-organic framework material.
- Authors: Chen B, Zhao X, Putkham A, Hong K, Lobkovsky EB, Hurtado EJ, Fletcher AJ, Thomas KM
- Issue date: 2008 May 21
- Some remarks on the calculation of the pore size distribution function of activated carbons.
- Authors: Gauden PA, Terzyk AP, Kowalczyk P
- Issue date: 2006 Aug 15
- Adsorption dynamics of gases and vapors on the nanoporous metal organic framework material Ni2(4,4'-bipyridine)3(NO3)4: guest modification of host sorption behavior.
- Authors: Fletcher AJ, Cussen EJ, Prior TJ, Rosseinsky MJ, Kepert CJ, Thomas KM
- Issue date: 2001 Oct 17