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Chapter 10 Absorption Page 10-1 Chapter 10 Absorption 1. Mass transfer in an NH4 scrubber  G al 1 1mG /Lln ylml yomxo      (1) From Eq. 10.3-12, Ky = G = 0.93 kg/s (28.84 g/mol)*(25 […]

Chapter 11 Biology and Medicine Page 11-1 Chapter 11 Biology and Medicine 1. Cholesterol Gallstone Dissolution Find the mass transfer coefficient from Table 8.3-3:  kd D20.6 d3  g  v2      1/4 v D […]

Chapter 12 Differential Distillation Page 12-1 Chapter 12 Differential Distillation 1. Very Pure Benzene a) A simple overall mass balance gives: hr mol hr mol hr mol BFD 8416100  b) Since the condenser produces equal amounts of product and […]

Chapter 13 Staged Distillation Page 13-1 Chapter 13 Staged Distillation 1. Pentane-heptane distillation F, xF = 0.3, q = 0.5 D, xD= 0.95, B, xB= 0.1 From Eq. 10.1-1 and 10.1-2, F = B + D 0.3F = 0.1B + […]

Chapter 14 Extraction Page 14-1 Chapter 14 Extraction 1. Mushroom flower The general equation for the length of a column is: 00 1ln 1 y ymx GmG Ka y mx L          […]

Chapter 15 Adsorption Page 15-1 Chapter 15 Adsorption 1. Dextran adsorption of IgG The basic equation is Eq. 15.2-9, q = q0y K + y 2. Phenol adsorption a) Using the given isotherm, we have: 0 53 0 53 10 […]

Chapter 16 General questions and heterogeneous chemical reactions page 16-1 Chapter 16 General questions and heterogeneous chemical reactions 1. Solubilization of linoleic acid For the solubilization of linoleic acid from spinning disc, we use eq. 16.3-7, 1/2 + 1/k3K2 R2 […]

Chapter 17 Homogeneous chemical reactions page 17-1 Chapter 17 Homogeneous chemical reactions 1. Accelerating antibiotic adsorption The adsorption on carbon is apparently slow, probably due to slow (heterogeneous) reaction or slow diffusion. Assume this, then k 0 = 6.110-4 cm/s […]

Chapter 18 Membranes page 18-1 Chapter 18 Membranes 1. Permeability and diffusion coefficient P = DH/RT = 63 barrer = 6310-10 cm3(STP)-cm/cm2/cmHg/s 2. N2 permeation from a hollow fiber module Following Example 17.2-2, a = 4(1 – )/d = 4*0.59/0.034 […]

Chapter 19 Controlled release and related phenomena page 19-1 Chapter 19 Controlled release and related phenomena 1. Spherical microcapsule From Eqn. of Contuity, at steady state, in spherical coordinates,   1     integrating once, we have […]

Chapter 2 Diffusion in dilute solutions page 2-1 Chapter 2 Diffusion in dilute solutions 1. Water evaporation To find the rate of evaporation, we need to find the flux of water across the air film: 11 c DH jΔ= l […]

1. Heat loss from a house From eq. 19.3-7, U = (l1/k1 + l2/k2)-1 = (8/2.710-4 + 0.2/0.5710-4)-1 = 3.0210-5 cal/cm2-s-K From eq. 19.3-6, q = UT = 3.0210-5*(18 + 14) = 9.6610-4 cal/cm2-s 2. Heat loss from a pipe […]

Chapter 21 Simultaneous heat and mass transfer page 21-1 Chapter 21 Simultaneous Heat and Mass Transfer 1. CCl4 concentration in air From Eq. 20.2-19, y1 = y1i – (Cp/Hvap) (T – Ti) 2. Evaporation of n-butyl alcohol From the Chilton-Colburn […]

Chapter 3 Diffusion in concentrated solutions page 3-1 Chapter 3 Diffusion in concentrated solutions 1. Diffusion flux halfway up a capillary The concentration profile is   1 – y1l z/l 2. Gas-oil cracking The reaction is A  3B […]

Chapter 4 Dispersion page 4-1 Chapter 4 Dispersion 1. Xylene pollution maximum concentration = M/  R2 so c12km  c1200m  200 m 2km c12km  130 ppm 10 41 ppm 2. Pulse of catalyst v0 = 17000 0.83(1.25)2 […]

Chapter 5 Values of diffusion coefficients page 5-1 Chapter 5 Values of diffusion coefficients 1. Diffusion coefficient of CO2 in air Use Chapman-Enskog Eq. 5.1-1 2. NH4 diffusion in air (a) 12 = (3.711 + 2.9)/2 = 3.3055Å 12/kB = […]

Chapter 6 Solute-solute interactions page 6-1 Chapter 6 Solution-solute interaction 1. Sievert’s Law The diffusion in the steel film is of the hydrogen atom. Therefore, jH = – DH    dcH dz z=0 = – DHH l pH […]

Chapter 7 Multicomponent diffusion page 7-1 Chapter 7 Multicomponent diffusion 1. Sulfate diffusion across membranes Because the volumes are large, the concentration in both chambers change slowly, and can be considered constant. From Table 7.4-2, 2. Organic ternary mixture In […]

Chapter 8 Fundamentals of mass transfer page 8-1 Chapter 8 Fundamentals of mass transfer 1. Drying T-Shirt dM Ak c sat c    2 3 661 553 0.6 20 1 0.3 sec 45min 60 min 0.0048 / gg […]

Chapter 9 Theories of Mass Transfer page 9-1 Chapter 9 Theories of Mass Transfer 1. O2 absorption From Ex. 8.1-1, –kaL/v at 25°C, 0.21 atm, c1(sat) = 2.29310-5*0.21*(1000/18) = 2.67510-4 M => k = – 1620/60 13700 ln   […]