Lecture Tuesday 4/15/08
Chemical Vapor Desposition
SiH2 can be thought of as an active intermediate
SiH 4 SiH 2 + H 2
~
~
SiH 2 + S SiH 2 S
~
~
SiH 2 S S + H 2
rdep = k s f SiH 2
PH 2 PSiH 2
rSiH 4 = k g PSiH 4
kp
f SiH 2
rAD = k A PSiH 2 f v
k SiH
Lecture Thursday 4/3/08
Normal Pentene Iso-Pentane
Langmuir Adsorption Isotherm
Catalytic Converters for Automobiles
Last Time
Catalytic Reforming Reaction (Gasoline)
Normal Pentane Octane Number =62
Iso-Pentane Octane Number=90
Normal Pentene Iso-Pentane
Lecture 23 Thursday 4/1/08
OCNB Explosion
Noble Prize 2007
Catalytic Steps
Temperature-time trajectory
UA(T0 T ) + (rAV )( DH rx )
dT
=
dt N A0 C pA + N B 0 C pB + N W C pW
Temperature oC
dT Qg Qr
=
dt
NC p
400
Isothermal
Operation
200
175
Qr = 0
Cooling
Lecture 21 Tuesday 3/25/08
CSTR With Heat Effects
Multiple Steady States
.
Ignition and Extiction Temperatures
CSTR with Heat Effects
Energy Balance for CSTRs
Equation (8-9)
(page 476)
Energy Balance for CSTRs
Equation (8-9)
(page 476)
Using
We obtain aft
Lecture 20 Thursday 3/20/08
Multiple Reactions with Heat Effects
User Friendly Equations Relate T and X or Fi
Heat Exchange
Ta
mC
FA0
FI
Heat Exchange Fluid
A
A
B
Elementary gas phase reaction carried out in a PBR
The feed consists of both inerts I and
Lecture 19 Tuesday 3/18/08
Gas Phase Reactions
Trends and Optimuns
User Friendly Equations Relate T and X or Fi
User Friendly Equations Relate T and X or
Fi
HeatExchange
Ta
mC
FA0
FI
Heat Exchange Fluid
A
A
B
Elementary liquid phase reaction carried out
Lecture18 Thursday 3/13/08
Solution to Tuesdays In-class Problem .
User Friendly Energy Balance Derivations
Adiabatic (Tuesdays lecture)
.
Heat Exchange Constant Ta
.
Heat Exchange Variable Ta Co-current
.
Heat Exchange Variable Ta Counter Current
Adiabat
Last time 3/6/08
D=vo / V
BioreactionEngineering
Wash Out:
1.) Neglect Death Rate and Cell Maintenance
2.) Steady State
How does this figure relate to drinking a lot of
fluids when you have an infection or cold?
Wash Out:
Maximum Production Rate =
Dividin
Last Time 3/4/08
Increase(I)concentrationincreaseslopeinterceptremainsunchanged.
rS =
V ax( )
mS
( )
I
KM1+ +( )
S
KI
UncompetitiveInhibition
Inhibitiononlyhasaffinityforenzymesubstratecomplex
k
kcat
1E S P
E +S
k2
k
4 I E S
I + E S
k5
Developingther
Lecture 14 Thursday 2/21/08
Pseudo Steady State Hypothesis
(PSSH)
Net Rate of Reaction of Active Intermediates is Zero
Hall of Fame Reaction: 2NO +O2 2NO2
AnactiveintermediateisamoleculethatisinahighlyenergeticandreactivestateIt
isshortlivedasitdisappears
Lecture 13 Tuesday 2/19/08
Complex Reactions
A +2B -> C
2A + 3C -> D
Liquid Phase PFR
Liquid Phase CSTR
Gas Phase PFR
Gas Phase Membrane Reactor
Sweep Gas Concentration Essentially Zero
Sweep Gas Concentration Increases with Distance
Semibatch Reactor
Mo
Lecture 12 Tuesday 2/12/08
Multiple Reactions
Selectivety and Yield
Series Reactions
Complex Reactions
Blood Coagulation
Many metabolic reactions involve a large number of sequential reactions, such
as those that occur in the coagulation of blood.
Cut Blo
Lecture 11 Thursday 2/7/08
Determining the Rate Law from Experimental Data
Integral Method
Graphical Method
Nonlinear Least Regression
Multiple Reactions
The Four Types
Whats New to Our Algorithm
Reactions in Series
Levenspiel Plot
F0
A
r
A
X
Two steps to
Lecture 9 Thursday 1/31/08
Membrane Reactors:
Used for Thermodynamically
Limited Reactions
Balances in Terms of Molar Flow Rates
Block 1: Mole Balances
Balance Equation on Every Species
Block 2: Rate Laws
Relative Rates
Transport Laws
Block 3: Stoichiomet
Todays Lecture 1/8/08 (2)
Review of Lecture 1
Solution to P1-6
Definition of Conversion, X
Develop the Design Equations in Terms of X
Size CSTRs and PFRs given rA=f(X)
Conversion for Reactors in Series
Review the Fall of the Tower of CRE
Lecture 2
Tues
Chemical Reaction Engineering (CRE) is the field that
studies the rates and mechanisms of chemical reactions and
the design of the reactors in which they take place.
TODAYS LECTURE
Introduction
Definitions
General Mole Balance Equation
Batch
CSTR
PFR
PBR
ChE 471 LECTURE 1
1
Introduction to Chemical Reaction Engineering and Some Definitions
Whenever there is a change in the atomic content, or atomic configuration, of a molecule of a
particular chemical species brought about by interaction with molecules of
Faculty of Science and Technology
TCCB
Chemical Reaction Engineering
HC 1
Single phase reactors:
Introduction & Model reactors
Wim Brilman
2011
CONTENTS
Introduction to process technology and reaction engineering
Overview of the course (subjects & organ