Gibbsian surface excess for gas adsorption - Revisited

被引:223
作者
Sircar, S [1 ]
机构
[1] Air Prod & Chem Inc, Allentown, PA 18195 USA
关键词
D O I
10.1021/ie9900871
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
The Gibbsian surface excess (GSE) represents the true experimental variable for measuring pure and multicomponent gas adsorption equilibria and kinetics by all conventional adsorption methods (volumetric, gravimetric, chromatographic, column dynamic, total desorption, isotope exchange, etc). The GSE can be used as primary variables to formulate the general thermodynamic and kinetic models for adsorption on energetically homogeneous and heterogeneous adsorbents. Thus, practical thermodynamic properties like surface potentials, isosteric heats of adsorption of components, and heat capacities of adsorption systems can be estimated using GSE. Several thermodynamic consistency tests (differential and integral) for binary adsorption systems can also be formulated using GSE. A mathematical framework describing the isothermal and nonisothermal column dynamics for adsorption of multicomponent gas mixtures can be developed using GSE. It can be used to simulate practical process design models (pressure and thermal swing adsorption) for gas mixture separation and purification. There is no need to estimate actual amounts adsorbed from the measured GSE variables by making ambiguous assumptions about the size of the adsorbed phase. The experimental GSE can be used to completely describe all practical thermodynamic, kinetic, column dynamic, and process design aspects of gas adsorption technology.
引用
收藏
页码:3670 / 3682
页数:13
相关论文
共 27 条
  • [1] BASMADJIAN D, 1997, LITTLE ADSORPTION HD
  • [2] Breck D.W., 1984, Zeolite molecular sieves
  • [3] Calorimetric heats of adsorption and adsorption isotherms .1. O-2, N-2, Ar, CO2, CH4, C2H6 and SF6 on silicalite
    Dunne, JA
    Mariwals, R
    Rao, M
    Sircar, S
    Gorte, RJ
    Myers, AL
    [J]. LANGMUIR, 1996, 12 (24) : 5888 - 5895
  • [4] ADSORPTION EQUILIBRIA AT HIGH-PRESSURES IN HELIUM-NITROGEN-ACTIVATED CARBON SYSTEM
    FERNBACH.JM
    WENZEL, LA
    [J]. INDUSTRIAL & ENGINEERING CHEMISTRY FUNDAMENTALS, 1972, 11 (04): : 457 - &
  • [5] Gibbs J. W., 1928, The collected works of J. Willard Gibbs
  • [6] GLESSNER AJ, 1969, CHEM ENG PROG S SER, V65, P73
  • [7] GAS-ADSORPTION ON SILICALITE
    GOLDEN, TC
    SIRCAR, S
    [J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE, 1994, 162 (01) : 182 - 188
  • [8] EQUILIBRIUM AND KINETICS OF ADSORPTION OF FREON-12 AT INFINITE DILUTION
    GOLDEN, TC
    SIRCAR, S
    [J]. AICHE JOURNAL, 1994, 40 (06) : 935 - 943
  • [9] Sensitivity of PSA process performance to input variables
    Hartzog, DG
    Sircar, S
    [J]. ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY, 1995, 1 (02): : 133 - 151
  • [10] SKIN RESISTANCE FOR ADSORBATE MASS-TRANSFER INTO EXTRUDED ADSORBENT PELLETS
    KUMAR, R
    SIRCAR, S
    [J]. CHEMICAL ENGINEERING SCIENCE, 1986, 41 (09) : 2215 - 2223