Module Notes
Undergraduate, 6th Semester (3rd Year, Spring)
Module Category:
Compulsory Modules
Module Type:
Core Chemical Engineering
Teaching Language:
English/Greek
Course Code:
CHM_755
Credits:
3
ECTS Credits:
4
Teaching Type:
Lectures (2h/W)
Τutorial (1h/W)
Module Availability on Erasmus Students:
Yes
Course URL:
E-Class (CMNG2169)
Module Details
Ability to calculate diffusion coefficients in various systems
Formulation of diffusion and convective mass transfer models
Diffusion problems in various applications including unit operations such as evaporation, distillation, absorption
Ability to design chemical processes involving mass transfer
The students are advised to refresh their knowledge in mass and energy balances, as well as in transport phenomena
INTRODUCTION: Definition of concentrations, Velocities and special flux rates. Law of Fick. Phenomenological theory of molecular diffusion. Diffusion coefficient: gas, liquid and solid media. Differential equations of mass transfer (balances). Usual initial and boundary conditions.
Molecular diffusion: concentration distribution in solids and fluids resting. Steady state and transient molecular diffusion. Exact analytical solutions of standard problems, steady state and transient molecular diffusion.
DIFFUSION AND REACTION: Diffusion with homogeneous chemical reaction. Diffusion with heterogeneous reaction. Relative influence of the mass transfer rate and reaction.
Diffusion porous materials: Molecular diffusion in porous materials. Knudsen diffusion, Surface diffusion
DIFFUSION AND REACTION IN CATALYTIC GRAIN
SPECIAL TOPICS IN MASS TRANSFER: Theory of diffusion in gases at low pressure, Knudsen diffusion, diffusion in binary mixtures, diffusion in solid solids, diffusion in porous bodies and diffusion in multicomponent mixtures.
CONVECTIVE MASS TRANSFER: Dimensional analysis and similarity. Convection at low and high Reynolds and Peclet numbers. Mass transfer coefficient. Proportions of mass transfer and heat linear momentum. Proportions of Colburn and von Karman.
MASS TRANSFER AND POLLUTION IN WATER RESOURCES: STREETER-PHELPS EQUATIONS
Teaching Organization
LECTURES: 2 h/w
RECITATION: 1 h/w
Total Module Workload (ECTS Standards):
104 Hours
Written Examination
There is a final examination accounting for 100% of the mark
1. ΛΥΓΕΡΟΥ ΒΑΣΙΛΙΚΗ, ΑΣΗΜΑΚΟΠΟΥΛΟΣ ΔΙΟΝΥΣΗΣ, ΑΡΑΜΠΑΤΖΗΣ ΓΕΩΡΓΙΟΣ, "ΜΕΤΑΦΟΡΑ ΜΑΖΑΣ", Εκδόσεις Α.ΠΑΠΑΣΩΤΗΡΙΟΥ & ΣΙΑ ΟΕ, ΑΘΗΝΑ, 2005
2. Transport Phenomena: A Unified Approach, Brodkey & Hershey, McGraw-Hill