Thermodynamics of Adsorption in Porous Materials

نویسنده

  • A. L. Myers
چکیده

Thermodynamic equations are de®eloped for adsorption of multicomponent gas mixtures in microporous adsorbents based on the principles of solution thermodynamics. The con®entional spreading pressure and surface area ®ariables, which describe 2-D films, must be abandoned for adsorption in micropores, in which spreading pressure cannot be measured experimentally or calculated from intermolecular forces. Adsorp( ) ( ) tion is di®ided into two steps: 1 isothermal compression of the gas, 2 isothermal ( immersion of clean adsorbent in the compressed gas. Thermodynamic functions Gibbs ) free energy, enthalpy, and entropy from solution thermodynamics pro®ide a complete thermodynamic description of the system. Applications are described for characterization of adsorbents, gas storage at high pressure, mixture adsorption, enthalpy balances, molecular simulation, adsorption calorimetry, and shape selecti®ity in catalysis.

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تاریخ انتشار 2002