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PH/PL q, q*, q M. Mofarahi, E. J. Shokroo/Petroleum & Coal 55(3) 216-225, 2013 224 ratio of operating pressures amount adsorbed, equilibrium amount adsorbed, and average amount adsorbed, respectively (mol/g) equilibrium parameter for the Langmuir model (mol/g) gas constant (cal/mol.K) radius of the pellet (cm) qm R Rp RBi, RBo inside and outside radii of the bed, respectively (cm) T Tatm T, Tw u yi z time (s) temperature of the atmosphere (K) pellet or bed temperature and wall temperature, respectively (K) interstitial velocity (cm/s) mole fraction of species i in the gas phase axial distance in the bed from the inlet (cm) Greek Letters α particle porosity ε, εt voidage of the adsorbent bed and total void fraction, respectively ρg, ρp, ρB, ρw gas density, pellet density, bulk density, and bed wall density, respectively (g/cm3) Subscripts B bed H higher operating pressure i component i L lower operating pressure p pellet g gas phase s solid w wall References [1] Castle, W.F. Air Separation and Liquefaction: Recent Developments and Prospects for the Beginning of the New Millennium. Int. J. Ref. 2002, 25, 158. [2] Ruthven, D. M. Principles of Adsorption and Adsorption Process; John Wiley & Sons, 1984. [3] Skarstrom, C. W. Method and Apparatus for Fractionating Gaseous Mixtures by Adsorption. U.S. Patent 2,944,627, July 12, 1960. [4] Skarstrom, C. W. Oxygen Concentration Process. U.S. Patent 3,237,377, March 1, 1966. [5] Fuderer, A.; Rudelstorfer, E. Selective Adsorption Process. U.S. Patent 3,986,849, October 19, 1976. [6] Malek, A.; Farooq, S. Study of a Six-Bed Pressure Swing Adsorption Process. AIChE J. 1997, 43, 2509. [7] Malek, A.; Farooq, S. Hydrogen Purification from Refinery Fuel Gas by Pressure Swing Adsorption. AIChE J. 1998, 44, 1985. [8] Sircar, S.; Golden, T. C. Purification of Hydrogen by Pressure Swing Adsorption. Sep. Sci. Technol. 2000, 35, 667. [9] Yang, R. T. Air Separation by Pressure Swing Adsorption Using Superior Adsorbents (Final Technical Report). Department of Chemical Engineering University of Michigan, 2001. [10] Santos, J. C.; Magalhaes, F.D.; Mendens, A. Contamination of Zeolites Used in Oxygen Production by PSA: Effects of Water and Carbon Dioxide. Ind. Eng. Chem. Res. 2008, 47, 6197. [11] Farooq, S.; Ruthven, D. M. A Comparison of Linear Driving Force And Pore Diffusion Models for a Pressure Swing Adsorption Bulk Separation Process. Chem. Eng. Sci., 1990, 45 (1), 107. [12] Farooq, S.; Rathor, M. N.; Hidajat, K. A Predictive Model for a Kinetically Controlled Pressure Swing Adsorption Separation Process. Chem. Eng. Sci. 1993, 48(24), 4129. [13] Hassan, M. M.; Ruthven, D. M.; Raghvan, N. S. Air Separation by Pressure Swing Adsorption on a Carbon Molecular Sieve. Chem. Eng. Sci. 1986, 41 (5), 1333.PDF Image | PRESSURE SWING ADSORPTION PROCESSES FOR AIR SEPARATION WITH ZEOLITE
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