PPT-MASS TRANSFER IN MEMBRANE PROCESSES

MEMBRANE TECHNOLOGY TRANSPORT MODELS Membrane s elective Ability to control the rate of permeation of different species Permeation mechanism model Solutiondiffusion model Permeants dissolve in the membrane material and then diffuse through the membrane down a concentration gradient. 8 362 Overall mass transfer coefficients Experimentally the mass transfer film coefficients k and k x are difficult to measure except for cases where the concentration difference across one phase is small and can be neglected Under these circumstanc Analogies. Heat .  Mass  . (sometimes). Momentum. Analogies are useful tools. An aid to understand transfer phenomena. A sound means . t. o predict behavior of systems for which limited quantitative data are available. Without mass from fluid 9 and Integrating this twice with Eq. 13 model correction has been This thermal correction factor factor. It original result and has been engineering ap- actual heat transfer ( MEMBRANE. SEPARATION. TRANSPORT MODELS. Membrane s. elective : . Ability . to control the rate of permeation of different species. Permeation mechanism model. Solution-diffusion model. Permeants. . dissolve in the membrane material and then diffuse through the membrane down a concentration gradient. Dr. . Kamal. E. M. . Elkahlout. Chapter 3. Mass transfer. INTRODUCTION. Three . types of transport . phenomenae. are involved in any separation process:. heat transfer, fluid flow and mass transfer. . Summary of Equations of Change.  . Summary of Equations of Change. Summary of Equations of Change.  . The momentum molecular flux, .  . * .  . molecular . stresses = pressure + viscous stresses. Summary of Equations of Change. Ahhhh. …. You’ve been soaking in the tub to try and relax after a hard day of standardized testing at school. Getting out of the tub, you notice that your fingertips and toes are like little raisins. Have you just aged 60 years?!?! No way, that’s just osmosis in action! Your fingers have absorbed the bath water, causing the tips to form wrinkly folds. . Objective. : To understand how cells transport materials. SQOD. : . Why does the size of a cell play such an important role in the movement of materials throughout the cell?. The larger the cell, the more time it takes to deliver the necessary materials to the various organelles. Smaller cells move materials much more quickly and efficiently.. DESCRIBE . the following types of thermodynamic systems:. Isolated system. Closed system. Open system. DEFINE . the following terms concerning thermodynamic systems:. Thermodynamic surroundings. Thermodynamic equilibrium. TECHNOLOGY. PRESSURE DRIVEN MEMBRANE PROCESS. Various pressure-driven membrane process can be used to : . 1. Concentrate . 2. Purify a dilute (aqueous or non aqueous). THE PARTICLE OR MOLECULAR SIZE AND CHEMICAL PROPERTIES . Brajendra. . shukla. IET, BU( . Deptt. . Of Biotechnology). Membrane separations used in DSP. Membrane separations: Introduction. Membranes are semi-permeable barrier used for. Mallare. , Tristan Howell C.. 5ChEC. Humidification. Evaporative humidification has effect when . a liquid is in direct contact with a gas. . The liquid evaporates into the gas because of the vapor concentration difference that exists between the liquid and the gas at the interface. Thus, the . . Images from transmission electron microscopy were less conclusive but improvement can be done in future by use of antibodies to visualize FLAP nanodiscs. Ultimately, reconstitution of FLAP was succe – Lecture 1. Dr. . eng.. . Alaa. D. . Jawad. AL-. Bayati. Definition of Mass Transfer. Q2. Define Mass Transfer?. The . transference of a component in a mixture from a region where its concentration is high to a region where the concentration is .