By R. Zarzycki, A. Chacuk and J.M. Coulson (Auth.)
This e-book offers a pragmatic account of the trendy concept of calculation of absorbers for binary and multicomponent actual absorption and absorption with simultaneous chemical response. The booklet contains elements: the idea of absorption and the calculation of absorbers. half I covers easy wisdom on diffusion and the speculation of mass move in binary and multicomponent structures. major tension is laid on diffusion thought simply because this kinds the foundation for the absorption strategy. 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 type of absorbers. The chapters current calculation tools for the elemental forms of absorber with an in depth research of the calculation tools for packed, plate and bubble columns. The authors illustrate the offered fabric with loads of examples, beginning with easy ones for binary structures and finishing with column calculation for multicomponent systems.
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Additional info for Absorption. Fundamentals & Applications
J (3-35) j=l is the external force acting on unit mass of component i, 32 CONSTITUTIVE RELATIONS and the term on the right-hand side, called the collision integral, is a complex intermolecular potential function. Enskog-Chapman's theory was once (1915-1930) one of the most-studied physical theories from the mathematical point of view. Explanation of its basic elements goes far beyond the scope of this chapter. Generally speaking, it consists of solving the Boltzmann equation (3-35) with respect to the distribution function Φ.
1 C l i= l where Ρ . is the pressure of component i at the critical point, and ci Τ is the temperature at the critical point. 1 X l O . According to equation 5 c c c (3-70) the product D Ρ does not depend on pressure at moderate pressures. From the available experimental data it follows that at high pressures there is a strong dependence of the product D. Ρ on reduced parameters. 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).
Irrespective of the multicomponent solution being ideal or not, the diffusion coefficient D describes the behaviour of ij the pair of components i-j in an η-component binary diffusion coefficient 3> characterizes ij solution, while the behaviour the of this pair in the binary solution. Due to the independence of the generalized Stefan-Maxwell diffusion coefficients with respect to the reference velocity and the composition in the case of dilute gases the generalized Stefan-Maxwell equations (3-64) are most often used more often than Fick's diffusion equations (3-60).
Absorption. Fundamentals & Applications by R. Zarzycki, A. Chacuk and J.M. Coulson (Auth.)