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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"

Ma7adesh bynga7
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
Adsorption
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