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Indian Institute of Technology Guwahati

Mass Transfer Operations -I

Indian Institute of Technology Guwahati and NPTEL via Swayam


This course will provide an overview of mass transfer operation at basic to an intermediate level. Coverage will be relatively broad. This course applies the concepts of diffusion and interphase mass transfer to the analysis of different mass transfer operations such as absorption and distillation. The goal is to provide students with the theoretical/analytical background to understand mass transfer operations as well as application and to tackle the sort of complex problems.
INTENDED AUDIENCE :B.Tech in Chemical Engineering and allied disciplinesPRE-REQUISITES :NILINDUSTRY SUPPORT : Almost all chemical industries including IOCL, OIL, ONGC, etc



Week 1: Introduction & Overview of Mass Transfer Operation, Molecular and Eddy Diffusion, Diffusion velocities and Fluxes, Fick’s First and Second Law, Steady state molecular diffusion in fluids under stagnant and laminar flow conditionsWeek 2: Diffusion through variable cross-sectional area, Gas phase diffusion coefficient measurement, Gas phase diffusion coefficient Prediction, and liquid phase diffusion coefficient measurement and prediction, Multicomponent diffusion and diffusivity in solidsWeek 3: Mass transfer coefficient concept and classifications, Dimensionless groups and correlations for convective mass transfer coefficients, Mass transfer coefficient in laminar flow, Boundary Layer Theory and mass transfer coefficients in turbulent flowWeek 4: Mass transfer theories, Interphase mass transfer, Interphase mass transfer and material balance for operating line, Number of ideal stages in counter current operation: graphical and algebraic methodsWeek 5: Introduction, classification, Sparged and agitated vessels design, Gas dispersed: Tray tower, Sieve Tray, Liquid dispersed: Venture scrubber, wetted wall column, Packed towerWeek 6: Introduction to absorption, Equilibrium in gas-liquid system, and minimum liquid rate, Design of packed column absorber based on the Individual Mass Transfer Coefficient, Design of packed column absorber based on the Overall Mass Transfer CoefficientWeek 7: Height Equivalent to a Theoretical Plate (HETP), Design of packed column absorber for dilute and concentrated gases, Absorption in plate column: Method of McCabe & Thiele-graphical determination of ideal trays and Introduction to multicomponent absorptionWeek 8: Introduction to distillation, binary equilibrium diagrams and concept of relative volatility, Distillation in non-ideal systems and concept of enthalpy-concentration diagram, Flash distillationWeek 9: Batch and steam distillation, Continuous multistate fractionation, Number of trays by McCabe & Thiele for distillationWeek 10: Limiting cases: total reflux and minimum reflux, Reflux below its bubble point: Sub-cooled reflux and use of open steam, Multiple feeds, multiple product withdrawal or side streamsWeek 11: Multistage batch distillation with reflux, The Ponchon-Savarit methodWeek 12: Distillation in packed towers, Introduction to multicomponent distillation and multicomponent flash distillation, Minimum stages and minimum reflux in a multicomponent distillation, Multicomponent batch distillation

Taught by

Prof. Bishnupada Mandal

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