PPT - Vapour - Liquid Equilibrium | Additional Documents & Tests for Civil Engineering (CE) PDF Download

 Page 1


Chemical Engineering
Thermodynamics
VAPOR/LIQUID EQUILIBRIUM VAPOR/LIQUID EQUILIBRIUM
Page 2


Chemical Engineering
Thermodynamics
VAPOR/LIQUID EQUILIBRIUM VAPOR/LIQUID EQUILIBRIUM
 So far we have only dealt with pure
substances and constant composition
mixtures.
 We will move a step further where
the desired outcome is the
composition change.
 In system such as distillation &
absorption, if the system is not in
equilibrium, the mass transfer
between system will alter their
composition.
Page 3


Chemical Engineering
Thermodynamics
VAPOR/LIQUID EQUILIBRIUM VAPOR/LIQUID EQUILIBRIUM
 So far we have only dealt with pure
substances and constant composition
mixtures.
 We will move a step further where
the desired outcome is the
composition change.
 In system such as distillation &
absorption, if the system is not in
equilibrium, the mass transfer
between system will alter their
composition.
10.1 Nature of Equilibrium
– Definition
– Measures of composition
10.2 The Phase Rule
– Duhem’s Theorem
10.3 VLE : Qualitative behavior
10.4 Simple Models for VLE
- Raoult’s Law
-Dewpoint & Bubblepoint Calculations with
Raoult’s Law
- Henry’s Law
Chapter Outline
Page 4


Chemical Engineering
Thermodynamics
VAPOR/LIQUID EQUILIBRIUM VAPOR/LIQUID EQUILIBRIUM
 So far we have only dealt with pure
substances and constant composition
mixtures.
 We will move a step further where
the desired outcome is the
composition change.
 In system such as distillation &
absorption, if the system is not in
equilibrium, the mass transfer
between system will alter their
composition.
10.1 Nature of Equilibrium
– Definition
– Measures of composition
10.2 The Phase Rule
– Duhem’s Theorem
10.3 VLE : Qualitative behavior
10.4 Simple Models for VLE
- Raoult’s Law
-Dewpoint & Bubblepoint Calculations with
Raoult’s Law
- Henry’s Law
Chapter Outline
10.1 THE NATURE OF EQUILIBRIUM
Equilibrium : A static condition in
which no changes occur in the
macroscopic properties of a system with
time.
The T, P,
composition
reaches final
value which will
remain fixed:
equilibrium
Page 5


Chemical Engineering
Thermodynamics
VAPOR/LIQUID EQUILIBRIUM VAPOR/LIQUID EQUILIBRIUM
 So far we have only dealt with pure
substances and constant composition
mixtures.
 We will move a step further where
the desired outcome is the
composition change.
 In system such as distillation &
absorption, if the system is not in
equilibrium, the mass transfer
between system will alter their
composition.
10.1 Nature of Equilibrium
– Definition
– Measures of composition
10.2 The Phase Rule
– Duhem’s Theorem
10.3 VLE : Qualitative behavior
10.4 Simple Models for VLE
- Raoult’s Law
-Dewpoint & Bubblepoint Calculations with
Raoult’s Law
- Henry’s Law
Chapter Outline
10.1 THE NATURE OF EQUILIBRIUM
Equilibrium : A static condition in
which no changes occur in the
macroscopic properties of a system with
time.
The T, P,
composition
reaches final
value which will
remain fixed:
equilibrium
Measures
of
composition
Mass or
mole fraction
Molar
concentration
Molar mass for
a mixture or
solution
m
m
m
m
x
i i
i
&
&
= º
V
x
C
i
i
º
å
=
i
i i
M x M
Measures of composition