OURSE TITLE : MASS TRANSFER OPERATIONS 1 COURSE CODE : 5071 COURSE CATEGORY : A PERIODS/ WEEK : 4 PERIODS/ SEMESTER : 52 CREDIT : 4 TIME SCHEDULE
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1 OURSE TITLE : MASS TRANSFER OPERATIONS 1 COURSE CODE : 5071 COURSE CATEGORY : A PERIODS/ WEEK : 4 PERIODS/ SEMESTER : 52 CREDIT : 4 TIME SCHEDULE MODULE TOPIC PERIODS 1 Diffusion and Absorption 13 2 Humidification 13 3 Drying Operations 13 4 Distillation 13 TOTAL 52 COURSE OUTCOMES : SL.NO SUB STUDENT WILL BE ABLE TO 1 understand the basic principle of mass transfer operations 2 Comprehend different type of diffusion processes 1 Understand the mechanism of absorption 3 Analyse the material balance of gas absorption 4 Comprehend different type of humidity. 2 5 Analyse the problems using humidity chart 6 Understand the working of cooling towers 3 7 Understand the mechanism of drying Appreciate the operations of different driers Analyse the simple problems of drying Comprehend the principles of different distillation 8 Appreciate the working of different distillation units Solve the problems relating to distillation. SPECIFIC OUTCOME MODULE I DIFFUSION AND ABSORPTION Know the diffusion Define diffusion Classification of diffusion Define eddy diffusion Define molecular diffusion Define thermal diffusion Explain the molar flux Explain fick s rate equation.
2 1.2.0 Understand the Absorption operations Define absorption Define desorption Define Henry s law Comparison of gas absorption and distillation Explain the mechanism absorption operation Explain the condition of equilibrium between gas and liquid Selection criteria for solvent in gas absorption Explain material balance relating absorption Solve simple problems relating to material balance Understand the construction and working of Absorption operation equipments Explain constructional details and working of packed tower with neat sketch Describe the different types of packing materials with example List the important characteristics of packing materials Distinguish between regular and random packing Explain the flow patterns of fluid through packing Define the term channelling Describe the various types of liquid distributors Understand the mechanism of adsorption in exchange process Differentiate between physical and chemical adsorption List the various adsorbents used and their applications Explain the manufacture of various adsorbents Explain the theory of adsorption. MODULE II HUMIDIFICATION Understand the Principles of Humidification Define the terms humidity, relative humidity percentage humidity, Molar humidity, humid volume & humid heat Identify the above terms in the form of a mathematical equation Solve problems based on the above equations Explain the humidity chart for air-water vapour system Calculate humidity, dew point, percentage humidity etc., from humidity chart Solve simple problems using humidity chart Explain the terms adiabatic saturation temp and wet bulb temp Derive the equation for adiabatic saturation temperature and wet bulb temperature Explain the factors influencing the adiabatic saturation and wet bulb temperature Understand the construction and working of water cooling towers Explain the constructional details of atmospheric type cooling Explain the constructional details of chimney type cooling tower Explain the constructional details of Forced draft cooling towers.
3 2.2.4 Explain the methods of humidification and dehumidification Describe the working of Humidifiers Compare the humidification and dehumidification operations. MODULE III DRYING OPERATIONS Understand the mechanism of drying operations List the industrial applications of drying Explain the classification of drying equipments Explain the constructional details and working of Tunnel dryer Rotary dryer, spray dryer Drum dryer Fluidised bed dryer and Tray dryer Explain the control measure adopted for the control of drying operation in the case of dryers List the field of application of various dryers Compare the performance of various dryers Explain the theory of drying Distinguish between wet basis and dry basis of expression of moisture content of solids Define the terms equilibrium moisture content, free moisture content and critical Moisture content Distinguish between bound water and unbound water Explain the mechanism of batch drying Explain constant rate period and falling rate period Derive an equation for calculating the time for drying (constant rate period and falling rate period) Simple problems using the above derived equation Explain the factors influencing the rate of drying. MODULE- IV Understand the Basic Principles of Distillation List the applications of distillation operation Define the terms less volatile, more volatile, low boiling and high boiling Define Raoult s law Define and distinguish ideal and non ideal solutions Estimate compositions in terms of mole fractions Construct the vapour liquid equilibrium diagram for a binary mixture Determine vapour liquid equilibrium data applying Raoult s law Derive an equation for relative volatility Solve the problems using the above derived equation Explain maximum and minimum boiling azeotrope with suitable examples List the various methods of distillation Explain equilibrium distillation with neat sketch Explain simple distillation Derive and verify Rayleigh s equation for simple distillation Solves the problem based on Rayleigh s equation Explain steam distillation List the advantages and applications of steam distillation.
4 MODULE I CONTENT DETAILS Diffusion Molecular diffusion molar flux Fick s rate equation. Absorption Mechanism of Absorption conditions of equilibrium between gas and liquid Henry s law factors controlling rate of absorption simple problems equipments for absorption operations packed tower packing materials characteristics of packing liquid distributors channelling. Adsorption Physical and chemical adsorption various types of adsorbents applications manufacture of adsorbents; ion exchange principle molecular sieves MODULE II HUMIDITY General mechanism of diffusion processes Definitions and mathematical expressions for molal humidity Absolute humidity Relative humidity percentage humidity Humid volume Humid heat Enthalpy and dew point simple problems. Humidity chart its importance and application in solving problems simple problems Adiabatic saturation temperature wet bulb temp cooling towers atmospheric natural and forced draft, cross flow type humidification and dehumidification air conditioning MODULE III DRYING Purpose and industrial applications drying equipment classifications tray dryer tunnel dryer rotary dryer turbo dryer spray dryer drum dryer cylinder dryer fluid bed dryer dry basis and wet basis of expression of moisture content equilibrium moisture content free moisture content bound and unbound water mechanism of batch drying of solids constant rate and falling rate period. Derivations of equations for time of drying in constant rate and falling rate period simple problems. MODULE IV DISTILLATION Distillation as an inter phase mass transfer industrial application definition of terms less volatile, more volatile, low boiling, high boiling vapour liquid equilibrium diagrams and their importance. Ideal and non-ideal solutions Raoult s law calculation of X-Y data using Raoult s law. Azeotropes maximum and minimum boiling volatility and relative volatility calculation of relative volatility of a binary mixture. Types of distillation equilibrium simple distillation- steam distillation.
5 REFERENCE McCabe and Smith - Unit Operations Treybal.R.E - Mass Transfer Operations P.Chathopadhya - Unit Operations of Chemical Engg. Vol. I Surya Narayana - Mass Transfer Operations K A Gavhane - Unit Operations. II
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