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# Tutorial 1 " Mass Transfer " 2014-2015

Mass Transfer as taught to senior chemical engineering students in Cairo University, Egypt.
by

## Mohamed Ismail

on 8 October 2015

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#### Transcript of Tutorial 1 " Mass Transfer " 2014-2015

Introduction to Mass Transfer
ChE-CU 2015

Blast from the past
Conversions
Introduction
What's mass transfer (Diffusion) ?

Molecular diffusion and Fick's law
Exercise problems
Mass Transfer
"El Ostora"

Dr Fahmy
One of the easiest subjects in the department
Graphical representations
Definitions
Laws
Applications
Types of Diffusion
Length:
1 ft = 0.3048 m , 1 in= 0.0254 m
1 in = 2.54 cm , 1 gallon = 3.785 litres
Mass:
1 lb = 0.4536 kg
Time:
1 hr = 60 min = 3600 sec

Pressure:
1 atm = 101.325 kPa = 760 mmHg = 14.7 psi

Temperature:
K=oC + 273 , R = oF + 460
1 K = 1 0C , 1 R = 1 oF
1 oC = 1.8 oF
1 K = 1.8 R
t (0F) = 1.8 t (oC) + 32

Raoult's law
Dalton's law
Partial Pressure
Dew Point
Bubble Point
Vapor Pressure
Mass/mole Ratio
Transfer Flux
Antoine's equation
Distillation
Absorption
Extraction
Drying
Psychrometry
Molecular
Convection
Predicting diffusivity
Calculating mass Transfer flux
Gases
Liquids
Solids
Mixtures
Equimolar diffusion
Unidirectional
0.0417
0.0435
0.4227
0.2971
2*10^-6*3.14 /4 *400 = 6.28*10^-4 lbmole/sec
Mohamed Ismail
e-mail: mohamed_marghany@live.com
office hours: Tuesday (10:30 - 11:30)
Wednesday (2:00 - 3:00)
F= D P * ln
RT
(P-P2)
(P-P1)
x2-x1
F= 0.1 *1 *ln
82*298
(1-0.001)
(1-0.2)
5
=1.82*10^-7 mol/cm2.s
Full transcript