title: Evaluation of the adsorption free energy of light guest molecules in nanoporous host structures.
abstract: We present a simple method for estimation of the adsorption free energy of lightweight featureless molecules in nanoporous structures. The partition function of the system is computed quantum mechanically within the ideal gas approximation, and leads directly to the free adsorption energy. Storage capacities can be estimated by combining the ideal gas results with the real gas equation of state. Two possible implementations of the approach are discussed. The assumptions and potential sources of errors in the calculations are analyzed. The performance of the method is illustrated for graphitic slit pores and solid C60.
authors.affiliation: Steacie Institute for Molecular Sciences, NRC Canada, 100 Sussex Drive, Ottawa, Ontario, Canada K1A 0R6. Serguei.Patchkovskii@nrc.ca
authors.forename: Serguei
authors.initials: S
authors.lastname: Patchkovskii
authors.forename: Thomas
authors.initials: T
authors.lastname: Heine
mesh_terms: D000327:Adsorption; D003198:Computer Simulation; D037741:Fullerenes / Q000737:chemistry; D006108:Graphite / Q000737:chemistry; D006859:Hydrogen / Q000737:chemistry; D008027:Light; D008956:Models, Chemical; D049329:Nanostructures / Q000737:chemistry*; D016062:Porosity; D011789:Quantum Theory; D013499:Surface Properties; D013816:Thermodynamics
chemical_list: D037741:Fullerenes; D006108:Graphite; D006859:Hydrogen; C069837:fullerene C60