By R. Zarzycki, A. Chacuk and J.M. Coulson (Auth.)
This booklet offers a realistic account of the fashionable conception of calculation of absorbers for binary and multicomponent actual absorption and absorption with simultaneous chemical response. The ebook includes elements: the idea 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 tension is laid on diffusion idea simply because this types the foundation for the absorption procedure. within the subsequent chapters the basics of simultaneous mass move and chemical response, the idea of the desorption of gases from beverages 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 equipment for the fundamental varieties of absorber with an in depth research of the calculation tools for packed, plate and bubble columns. The authors illustrate the offered fabric with a lot of examples, beginning with easy ones for binary structures and finishing with column calculation for multicomponent systems.
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Extra resources for Absorption. Fundamentals & Applications
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 average error using this method is in the range 1 to 20%. 3-2. 2 Κ b) ammonia (polar) - oxygen (nonpolar) at temperature Τ = 2 9 3 . 2 Κ. In both cases diffusion occurred under atmospheric pressure. 681 Χ 10" + 4 . 418X10" ε Ik = 230 Κ A σΑΏ B 10 Β m 10 £ A ß / k = V(fi A /k)(e B /k) = V 9 1 . 5 X 10" m /kmol dA From Table 3-3: V 3 xioAB 11 Ρ (V 3 τ · 5 J '/ 3++ 1 3J 2 dB ' 1 r j _ 7 5 YV "' )) d A M ί j _ ) + i n M A B J 1 7 5 ^ + i M ï ï 7 L 5 J.
K = 1,2,3) and (3-43) J while thermal diffusion is connected with different coefficient j<°> = - dV°> (i = Ι , . , . , η ) (3-44) The coefficients occuring in equations (3-44) and (3-43) are called multicomponent thermal diffusion coefficients and multicomponent diffusion coefficients, respectively. The last are also called Fickian multicomponent diffusion coefficients. ,n) β i i av i (3-45) where factors a and β are extremely complicated integrals calculated by the extension of functions in terms of Sonine polynomials.
2 Ί) xlO Α 5 error % Ε i 1.. 8 2 Example 3-B. 312 at temperature Τ = 370 Κ, under atmospheric pressure. 25 X 10 Pa? 8 Κ. 5 X 10~ m /kmol, m/kmol. 00 kg/kmol. can Pa be calculated by Fuller's DIFFUSION 9 . 8 6 x 10" (370 ) 5 1 1 17 . 013x1 0 [ ( 2 0 . 01 + (18 . 25xl0" m /s 5 2 9 . 013X10 1 1 17. 7xl0" ) 5 3 1 / 3 + 1 32 . 00 1/2 ( 1 6. 31xl0" m /s 5 2 9 . 5xl0" ) 5 3 1 28 . 96xl0" m /s 5 2 According to the Enskog-Chapman theory, changes in Φ.. 11xl0" il = « 125 Χ 1 0" ο ρ 1 0 1 3 X 10 (3-Β2) 3 thus, they would not depend on the mixture composition.