n
yi
K =1
i =1
i
Example Problem
Find the bubble Point temperature for a liquid mixture containing
15 M% isopentane, 30% npentane, 55% nhexane at a Pressure of
1 atm.
Equation
Constants
Compone aT1
ChE 305
Problem 3 D6
HV= 15224.76 Btu/lbmole
xi
36.13601 C
K
1.002101 0.996905622 97.04482 F
0.316042 0.003164135
1.000069757
F=
0
P=
q= 1.153305
L = 5877.243
V = 4375.237
LV=
1.343297
0.4 mol fract
4
Distillation
Binary Systems
1
F
Retrofit
1
1
Example
A steadystate, countercurrent, staged distillation column is to be used to
separate ethanol from water. The feed is a 30 wt% ethanol, 70% water
mi
Example Problem
Find the bubble Point temperature for a liquid mixture containing 15 M
% isopentane, 30% npentane, 55% nhexane at a Pressure of 1 atm.
xi
0.15
C
iC5
50
1.9
0.3
0.55
nC5
1.45
nC6
0.52
CHE 305 Process Separations
Homework #5
Due 05/18/16
1.
A distillation column is separating 1000 mol/h of a 32 mol% ethanol and 68 mol% water
mixture. The feed enters as a subcooled liquid that will c
Stability of Linear Processes
Stability
Plots
Definition of a Stable Process
The process is stable IF C(t) CSS 0 as t
For all values of C(0)
Definition of a Stable Process
Consider a linear process o
2e. Balances
Types
Mass, components, energy, force
Accum= rate in rate out
2g. Equations
Constitutive Equations
(Rate Equations)
Mass Flows
dM
m in m out
dt
dV
Fin Fout
dt
dMxa
m in xain m ou
Drexel University
October 13, 2011
Open Book
1 hr
Ch E 305
Process Separations
Exam 1
Be sure to show all equations used and the calculations. For any trialanderror problems,
you only need to show t
CHE 305 Process Separations
Homework #6
Due 05/25/16
1.
We are separating a mixture that is 40 mol% isopentane, 30 mol% nhexane and 30 mol%
nheptane. We desire a 98% recovery of nhexane in the bott
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CHE 305 Process Separations
Homework #7
Due 06/01/16
1.
Two feeds consisting of mixtures of acetic acid and water are to be extracted in a 3 stage
crossflow extractor. The solvent entering stage 1 an
CHE 305 Process Separations
Homework #4
Due 05/11/16
1.
For the separation of ethanol and water, find the q values and plot the feed lines for each
of the following feed conditions (use the ethanolwa
ChE 308
Process Modeling II
Review
rate of mass or energy rate of mass or rate of mass or
accummulation in a energy entering energy leaving
system
a system
a system
Two methods
Integral Balanc
CHE 305 HW 5, Due Nov 8
1) An air stream contains 10% mol CO2 that needs to be removed using an amine
solution. The amine solution contains 0.04 mol CO2 /mol solution. The column is
isotherma
CHE 305 HW 4 due Oct 25
(this is more of Chapter 4, especially sections 4.4 and 4.7)
1) The partition coefficient for acetic acid at equilibrium between benzene and
CHE 305 F 17 practice questions for midterm
Note: The exam will be open notes/open book. You can bring any calculator youd
like.
These are samples to help you practice
HW 2
Read Chapt 3
1) A tank with radius of 5m contains benzene up to a level of 2cm below the
tank height. Accidently, the lid has been removed so that benzene st
HW 3
Read chapter 4
1) The following mixture of components 17 (with the relevant K values for the
process conditions) is to flashed in a single stage. Find the value
HW 1 SOLUTION
2) a) From figure 2.1 from the book, can estimate the vapor pressures; or, use
engineering toolbox (http:/www.engineeringtoolbox.com/propanevapor
pressured_10
HW 2 solution
1) This is evaporation into a stagnant film. Assuming that steady state applies
(namely, that the height in the tank does not change much) and the gas is
CHE 305 F17: HW 1
General: In some HW questions (throughout the term) you might need to find data
on your own. Any data that is not given in the problem statement nee
Numerical Methods
Part 2
Solutions for Integration of
Differential Equations
Numerical Solutions of Differential Equations
Qi=Constant or f(t)
V=volume
H
Qo(t)
Qo=CVH1/2
dV
Qi Qo
dt
V A H
dV
dt dt V
Stability of a Nonlinear Process
Which most real processes fall into
Nonlinear Process
dX
f X
dt
X1
Where X
X n
f1 X 1 , X 2 , X n
and f X
f n X 1 , X 2 , X n
Linear is a Special case of a
CHE 305 HW 1 Solutions
Question 1: Total 5 pts
+1: Graphing VLE Data
+1: Showing data used/What binary system was used
+3: Description: Characteristics of system and why/how you know
Question 2: Total