title: Theoretical insight of physical adsorption for a single-component adsorbent+adsorbate system: I. Thermodynamic property surfaces.
abstract: Thermodynamic property surfaces for a single-component adsorbent+adsorbate system are derived and developed from the viewpoint of classical thermodynamics, thermodynamic requirements of chemical equilibrium, Gibbs law, and Maxwell relations. They enable us to compute the entropy and enthalpy of the adsorbed phase, the isosteric heat of adsorption, specific heat capacity, and the adsorbed phase volume thoroughly. These equations are very simple and easy to handle for calculating the energetic performances of any adsorption system. We have shown here that the derived thermodynamic formulations fill up the information gap with respect to the state of adsorbed phase to dispel the confusion as to what is the actual state of the adsorbed phase. We have also discussed and established the temperature-entropy diagrams of (i) CaCl2-in-silica gel+water system for cooling applications, and (ii) activated carbon (Maxsorb III)+methane system for gas storage.
authors.affiliation: Department of Mechanical Engineering, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260.
authors.forename: Anutosh
authors.initials: A
authors.lastname: Chakraborty
authors.forename: Bidyut Baran
authors.initials: BB
authors.lastname: Saha
authors.forename: Kim Choon
authors.initials: KC
authors.lastname: Ng
authors.forename: Shigeru
authors.initials: S
authors.lastname: Koyama
authors.forename: Kandadai
authors.initials: K
authors.lastname: Srinivasan