# Download Principles and Modern Applications of Mass Transfer by Jaime Benitez PDF

By Jaime Benitez

This textbook is designed for classes in mass move operations, a staple in any chemical engineering curriculum. the second one variation is up to date to debate many constructing issues in mass move operations no longer mentioned within the first, together with membrane separations, chromatography and different adsorptive approaches, ion trade, electrophoresis, and multistage batch distillation, differential delivery equations, and boundary-layers. This new version also will contain mass move phenomena in organic platforms, making it appropriate in biochemical engineering in addition to chemical engineering.

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Notice that in the bio-artificial kidney the removal efficiency of all the wastes must be kept low because of the need to maintain homeostasis in the patient's body at all times. If too many wastes are removed at one time, death may occur. 2 Velocities and Fluxes Your objectives in studying this section are to be able to: 1. Define the following terms: mass-average velocity, molar-average velocity, mass (or molar) flux, and diffusion mass (or molar) flux. 2. Write down an expression to calculate the mass (or molar) flux relative to a fixed coordinate system in terms of the diffusion mass (or molar) flux and the bulk motion contibution.

During the procedure, the patient’s kidneys were completely inactive. 3% by weight. 3 mg/dL of urea. 0245. Calculate: (a) The urea removal efficiency by the bio-artificial kidney. (b) The urea concentration in the plasma of the cleansed blood, in mg/dL. Solution (a) Write a material balance for urea on the artificial kidney. Basis: 4 hours Assuming that the rate of formation and decomposition of urea during the procedure is negligible and that no urea is removed by the patient’s kidneys: urea in “clean” blood = urea in “dirty” blood - urea in urine The mass of urea in the urine is simply 1540 ~ 0 .

1984. , 1984. 5 Volume. 6 Calculation of Diffusivity by the Wilke-Lee Equation with Known Values of the Lennard-Jones Parameters Estimate the diffusivity of carbon disulfide vapor in air at 273 K and 1 bar using the Wilke-Lee equation (1-49). Compare this estimate with the experimental value reported in Appendix A. 52 x lo4 S As evidenced by this example, estimation of binary diffusivities can be quite tedious. Most mass-transfer problems involve the calculation of one or more values of diffusivities.