No abstract

No abstract

No abstract

No abstract

Ind. Eng. Chem. Process Des. Dev. 1986, 25, 705-710 705 computational efficiency. Thus far, even though the program has been found to converge in 2 or 3 iterations, each iteration takes about 11 cpu min on a VAX 11/750 minicomputer, using 50 packing increments in the finite difference grid. AcknowledgmentWe gratefully acknowledge support of this research effort by the Environmental Protection Agency under Cooperative Agreement No. CR-809317. Nomenclature a = interfacial are per unit volume of packing, area/volume CGi = heat capacity of i in gas phase, energy/(time-area-de-capacity of i in liquid phase, energy/(time-areagi = molar flow rate of i in gas phase, moles/(time-area) G = total molar flow rate of gas phase, moles/(time-area) hi* = partial molar enthalpy of component i in the liquid at hG' = gas-phase heat-transfer coefficient corrected for mass hL = liquid-phase heat-transfer coefficient, energy/ (time-Hi* = partial molar enthalpy of component i in the gas at HG = enthalpy of the gas phase, energy/mole HL = enthalpy of the liquid phase, energy/mole AHsi = heat of solution of i, energy/mole in solution Ki = Henry's law constant kXi = mass-transfer coefficient for component i in liquid phase, kYi = mass-transfer coefficient for component i in gas phase, li = molar flow rate of i in liquid phase, moles/(time-area) L = total molar flow rate of liquid phase, moles/(time-area) Ni = molar flux of i across the gas/liquid interface, moles/ gree) degree) concentration xi* and temperature T* transfer, energy/ (time-area-degree) area-degree) concentration yi* and temperature T* moles/ (time-interfacial area) moles/ (time-interfacial area) (time-interfacial area) nc = number of components in system TG = bulk temperature of gas phase, degrees TL = bulk temperature of liquid phase, degrees To = reference temperature, degrees T* = interfacial temperature, degrees xi = mole fraction of i in liquid phase xi* = mole fraction of i in liquid-phase interface yi = mole fraction of i in gas phase yi* = mole fraction of i in gas-phase interface z = position in column, length hi = latent heat of vaporization of i, energy/mole Literature Cited Ackerman, 0. Forschungsheff 1837, 382, 1. Bllllngsley, D. S.; Chirachavala, A. AIChE J . 1981, 2 7 , 966. Felntuch, H. M.; Treybai, R. E. Ind. Eng. Chem. Process Des. Dev. 1978, Finlayson, B. A. "Nonllnear Analysis in Chemical Engineering", 1st ed.; Holland, C. D.; Lapls, A. I. "Computer Methods for Sohrlng Dynamic Separa-Kelly, R. M. Ph.D. Thesis, North Carolina State University, Raleigh, 1981. Kelly, R. M.; Rousseau. R. W.; Ferret J. K. Ind. Eng. Chem. Process Des. Klng, C. J. "Separation Processes", 2nd ed.; McGraw-Hill: New York, 1980; "Landolt-Ei5rnstein. Zahlenwarte und Funktionen 6. Auflage IV. Band Technik, 4. Teil Warmetechnik Bestandtell C1, Absorption in Flussigkelten mlt niedrigem Dampfruck"; Springer-Verlag: Berlin-Heldelberg-New York, 1976. LazabCrabtree, H.; Breedveld, 0. J. F.; Prausnitz, J. M. AIChE J . 1980, 2 6 , 462. McDaniel, R.; Holland, C. D. Chem. Eng. Sci. 1970, ...