Andrea del Sarto.
Virgin of the Harpies
1517.
AD SUMMU[M] / REG[I]NA TRO / NU[M] DEFER / TUR IN AL /
TUM / 'The Queen is transported to the supreme throne high above.' (From
the Mass of the Feast of the Assumption of the Virgin
Here the repellent harpies

function dXy = ODE524(W,Xy, problem)
X = Xy(1);
y = Xy(2);
vo = 2.83e-7;
Fao = 2e-5;
eps = -0.5;
v = vo * (1+eps*X) / y;
Fa = Fao * (1-X);
Ca = Fa/v;
Cb = Ca;
k = .004;
if problem = 'b'
alpha = 3.55e5 * 3.477;
else
alpha = 3.55e5;
end
if problem = 'd'
Cc

Example particle containing reactors with mass transfer effects
1. First order liquid phase reaction of A B is carried in a PBR filled with porous
spherical beads. Neglect liquid film resistance and the pressure drop. Calculate the
conversion of A leaving

Example 1
2 N 2O5 k O 2 4 NO 2
First order kinetics are observed,
r k[ N 2O 5]
Is the following mechanism consistent with the above rate
expression?
N 2O 5 k 1 NO 2 NO 3
k2
k3
NO 2 NO3
NO O 2 NO 2
slow
k4
NO NO 3
2NO 2
Assume that the slow reaction is

Examples 6 Variable volume or volumetric flow rate/ T effect
Problem 1
Design equation for CSTR
FA0 X = (rA ) V
,
r = kCACB
r A = -r = -kCACB
CA =
FA 0 (1 X )
C (1 X ) T0 P
FA
=
= A0
1+ X T P0
(1+ X ) T P0
)
0(
T0 P
b
b
FA0 B X C A0 B X
F
a
a T0 P
CB

Make the following corrections in the lecture
file Rate from mechanism.ppt
Slide 9: Equation 10, change rA to rA
Example 1
2 N 2O5 k O 2 4 NO 2
First order kinetics are observed,
r k[ N 2O 5]
Is the following mechanism consistent with the above rate
expre

Examples 15 (set 1 of heat effects in reactors)
1. An Autocatalytic reaction of the type:
A + R R+ R
Forward reaction rate constant k1 and reverse rate constant k-1. The reaction is being
carried out in the combination shown below.
Pure A
Ideal CSTR
Ideal

Examples Reactors Containing Catalyst Particles
For the following examples it is assumed that the pressure drop is negligible. Pressure
drop is taken into account in Examples 9 and those given as part of lecture file 7.
1. Consider the PBR below with well

ChE 400 class examples (Enzymes)
1. Lactase, also known as -galactosidase, catalyzes the hydrolysis of lactose to
produce glucose and galactose from milk and whey. Experiments are carried out
to determine the kinetic parameters for the enzyme. Initial dat

Exam 2 Review Problems Part 1
(Part 2 will be 2-3 problems on deriving rate expression, .on Friday)
1. An irreversible liquid phase reaction AB is carried out in an ideal PFR. The feed
concentration of A is equal to 3.0 mole/L. The feed temperature is at

Solution ChE 400 Class Examples (Enzymes)
1. Lactase, also known as -galactosidase, catalyzes the hydrolysis of lactose to
produce glucose and galactose from milk and whey. Experiments are carried out
to determine the kinetic parameters for the enzyme. In

Solution to Group Exercise (01/13/2017)
An irreversible aqueous reaction gave 90% conversion in a batch reactor at 40oC in 10 min and required
3 min for this conversion at 50oC. (Note: You can assume irreversible first order kinetics)
(a)
(b)
(c)
(d)
What

rGroup Exercise #2
Problem 1 (Activation energy)
Milk is pasteurized if it is heated at 630C for 30mins. But the rate doubles if it is heated to
740C. Find the activation energy of this sterilization process.
Mr I: 23ng : gag/(I Pavia Vs \j
NC 127: itet

Group Exercise #1
1.) Oxidative dehydrogenation of ethane is the conversion of ethane with oxygen to yield
ethylene and water.
a.) Write down the reaction equation, and list (separately) the stoichiometric
coefficients for all reactants and products.
2C2H

Example Problem (Lecture 4 01/11/2017)
At a NHL playoff game party off-campus, several of the individuals were observed to be drinking excessively.
One of the individuals in attendance blood alcohol level was measured at 0.21% when he stopped drinking at

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496
Living E mp e Problem
The economic
incentive
$ = 0.68/kg
vs. 0.44/kg
The algorithm
Following the Algorithm
Nonisothermal Reactor Design Chapter 11
Example 113 Adiabatic Liquid-Phase Isomerization of Normal Butane
Normal butane, C4H10

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Examples 8 Selectivity
Reactant A decomposes by three simultaneous reactions to form three produces, one that is desired, B,
and two that are undesired, X and Y. These gas-phase reactions, along with the appropriate rate laws, are
called the Trambouze rea