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EL3491 – Mass Transfer Syllabus
Unit – I: Molecular Diffusion
Introduction to mass transfer operations; Molecular diffusion in gases, liquids and solids; diffusivity measurement and prediction; multi-component diffusion.
Unit – II: Convective Transfer And Interphase Mass Transfer
Eddy diffusion, concept of mass transfer coefficients, theories of mass transfer, different transport analogies, application of correlations for mass transfer coefficients, inter-phase mass transfer, relationship between individual and overall mass transfer coefficients.
Unit – III: Absorption
Gas Absorption and Stripping – Equilibrium; material balance; limiting gas-liquid ratio; tray tower absorber – calculation of number of theoretical stages, tray efficiency, tower diameter; determination of height of packing using HTU and NTU calculations.
Unit – IV: Distillation
Vapour liquid equilibria – Raoult’s law, Principle of distillation – flash distillation, differential distillation, steam distillation, multistage continuous rectification, Number of ideal stages by Mc.Cabe – Thiele method, Total reflux, minimum reflux ratio, optimum reflux ratio.
Unit – V: Leaching & Extraction
Liquid-liquid extraction – solvent characteristics-equilibrium stage-wise contact calculations for single-stage extraction, multi-stage cross-current extraction, multi-stage counter-current operation. Solid liquid equilibria- equilibrium diagram for leaching, single-stage leaching, multi-stage continuous cross current and counter-current leaching, stage calculations, stage efficiency.
Text Books:
- Robert E. Treybal, “Mass Transfer Operations” McGraw Hill Education India.
- Christie John Geankoplis Transport Processes and Separation Process Principles 4th Edition PHI.
- K Asokan, Mass Transfer concepts, University Press.
References:
- Warren Mc Cabe, Julian Smith, Peter Harriott, Unit Operations of Chemical Engineering 7th Edition, Mc Graw Hil.
- J.M.Coulson and J.F. Richardson with J.R.Backhurst and J.H.Harker, “Coulson and Richardson’s Chemical Engineering”, Vol.1, “Fluid Flow,
- Heat Transfer and Mass Transfer”, Butterworth Heinmann, 6th Edition, 2000.
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