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By R. Zarzycki, A. Chacuk and J.M. Coulson (Auth.)

This booklet supplies a realistic account of the fashionable idea of calculation of absorbers for binary and multicomponent actual absorption and absorption with simultaneous chemical response. The publication includes elements: the speculation of absorption and the calculation of absorbers. half I covers uncomplicated wisdom on diffusion and the speculation of mass move in binary and multicomponent structures. major pressure is laid on diffusion idea simply because this varieties the root for the absorption procedure. within the subsequent chapters the basics of simultaneous mass move and chemical response, the speculation of the desorption of gases from drinks and the formula of differential mass balances are mentioned. half II is dedicated to the calculation of absorbers and the category of absorbers. The chapters current calculation equipment for the elemental varieties of absorber with a close research of the calculation tools for packed, plate and bubble columns. The authors illustrate the awarded fabric with a number of examples, beginning with uncomplicated ones for binary structures and finishing with column calculation for multicomponent systems.

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P) refers to atmospheric pressure and 46 STEFAN-MAXWELL DIFFUSION temperature T, and coefficients A, B, C, D and Ε are functions of reduced pressure P f (Table 3-5). Equation (3-75) is presented Table 3-5. 1 1 01 0 038 042 1 . 3 1 01 0 098 317 2 . 8 1 03 0 . 0 1 . 03 0 . 5 1 . 04 0 . 790 770 3 . 279 84 0 3 1 . 05 0 . 502 100 2 . 390 3 1 0. 602 907 4 1 . 06 0 . 837 452 3 235 13 0 5 1 . 07 0 . 8 9 0 390 3 . 130 0 1 0 6 190 43 graphically (Fig. 3-2). It should be noted that for dense gases the dependence of coefficients Ό on the mixture composition is illustrated only by the dependence of the reduced parameters on this composition.

The number of gas molecules in a unit volume is defined by the ratio p/m . The sixth part of this number tends to χ . In unit time there ο 1 Ο 2 are -? — 2ω Atnd collisions of the considered molecule with those ο m ο ο tending to χ . The considered molecule moves at a velocity V2

Equations (3-2) to (3-4) define three basic average velocities of the fluid which are used in the theory of diffusion as reference velocities: mass average velocity u, molar average velocity and volume average velocity u " . Each velocity can be used to define the respective mass or molar diffusion flux of the component. ,n) T (3-13) and volume average velocity j " = p i V " ( u } (i = 1 — n ) is formed. ,η) (3-17) T j" = (3 B Moreover, as a relative velocity we can assume the velocity of one specific component of the fluid.

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