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Fundamentals of Collision Theory
A + B -> C + D
Objec'ves:
Why the rate laws depend on the concentra'on of the
reac'ng species, -rA = kCACB?
Why the temperature dependence is the form of the
Arrhenius law,
H. Scott Fogler
1/24/06
Chapter 3
Professional Reference Shelf
A. Collision Theory
Overview Collision Theory
In Chapter 3, we presented a number of rate laws that depended on both
concentration and temperature. For the elementary reaction
A+BC+D
the eleme
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Collection and Analysis of Rate Data
Finding the Rate Law
Chapter 5, Fogler
Consider the following reaction that occurs in a constant volume batch
reactor
We will withdraw samples and record the concentration of A as a
function of time
Mole Balanc
H. Scott Fogler
2/1/05
Chapter 3
Professional Reference Shelf
B. Transition State Theory
Overview
Transition state theory provides an approach to explain the temperature and
concentration dependence of the rate law. For example, for the elementary reactio
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Transi'on State Theory
Transition state theory provides an approach to explain the temperature and
concentration dependence of the rate law.
1
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2
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The rate of reaction is equal to the product
of the frequency, vI, of the activate
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Chemical Reaction Engineering
the field that studies the rates and mechanisms
of chemical reactions and the design of the
reactors in which they take place.
Reaction Rate
The reaction rate is the rate at which a species looses its chemical
ident
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Chapters 13-14: Distribu6ons of
Residence Times for Modeling
Non-ideal Chemical Reactors
Residence-Time Distribu6ons (RTD)
1.
2.
To diagnose problems of reactors in opera6on
To predict conversion or euent concentr
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Polymeriza0on
Polymers
Polymers are macromolecules built up by the linking together
of large numbers of much smaller molecules. The smaller
molecules are called monomers and they repeat many 0mes.
A polymer
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Enzyme kine.cs
Enzymes are catalysts
Enzymes are biological catalysts which ensure
that required chemical reac.ons occur at the
proper .me and place to convert metabolic
energy, build biopolymers and cellular
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Chapter 10:
Catalysis and Catalytic Reactors
A Catalyst is a substance that affects
the rate of chemical reaction but
emerges from the process unchanged.
Catalysis is the occurrence, study, and
use of catalysts and catalytic processes.
Approximat
4 Edition
th
Appendix K
K.1 Solutions to Differential Equations
K.3.A First-order Ordinary Differential Equations
Also see http:/www.ucl.ac.uk/Mathematics/geomath/level2/deqn/
de8.html
dy
+ f (t) y = g(t)
dt
Integrating factor = exp
(K-15)
( fdt)
Multiply
Foundations of Chemical Kinetics
Lecture 12: Transition-state theory:
Examples
Marc R. Roussel
Department of Chemistry and Biochemistry
Eyring plot example: Internal rotation of
N,N-dimethylnicotinamide
O
CH3
N
CH 3
N
This elementary process can be studie