Module Notes

Mass Transfer

This module will not be offered for this semester

Faculty Member (Members)

i.kookos

Undergraduate

Spring

3rd Year

6th Semester (3rd Year, Spring)

Module Type

Core Chemical Engineering

Module Category

Compulsory Modules

Course Code:

CHM_755

Course URL:

E-Class (CMNG2169)

Credits:

ECTS Credits:

Module Availability on Erasmus Students:

Yes

Teaching Language:

English/Greek

Laboratory:

Lectures:

2h/W

Τutorial:

1h/W

Project/Homework:

Teaching Type

Student's office hours:

Module Details

Learning Outcomes

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

Prerequisites

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