distill_(alpha,heat).xlsx
TRANSCRIPT
-
8/14/2019 Distill_(alpha,heat).xlsx
1/1
Distillation using the Ponchon-Savarit method with alphaby Mark Burns and James Sung
Department of Chemical Engineering at the University of Michigan
D = 41.18 mol/hr
Example from Geankoplis, Xd = 0.95
1993, p. 674
R = 1.755
F = 100 mol/hr alpha = 2.5
q = 1.195
Xf = 0.45 E(ML) = 1
W = 58.82 mol/hr
Xw = 0.1
= 11
Qr = 4138403.7 J/hr Minimum Reflux = 1.16
Saturated Qc = -3510493.9 J/hr
Liquid Vapor
5109 HB = 38439 J/mol Ponchon-Savarit Diagram >>>>>>>
0 HA = 30820 J/mol
Graphical Representation of Successive Substitution McCabe-Thiele Plot Ponchon-Savarit Plot
Distillate41.18 mol/hr
0.95 Desired Xd
Tray x y
Enriching Line Sat. Liquid line
1 0.88372 0.95 y = 0.637 0.345 h = -5109 x +5109.000
2 0.79762 0.90786
3 0.69951 0.85337 Sat. Vapor line
4 0.60308 0.79160 Stripping Line H = -7619 x +38439.000
5 0.52114 0.73124 y = 1.442 -0.044
6 0.45970 0.68021 Point D'
7 0.39707 0.62213 x = 0.95
Feed 8 0.31272 0.53216 q line H' = 85510.3
100 mol/hr 9 0.21777 0.41038 y = 6.128 -2.308
0.45 Xf 10 0 .13026 0.27242
x = Point W'hF 11 0 .06326 0.14444 x = 0.1
-3469.1475 12 - done Intersection (q,enriching) h' = -65754.8
13 - - x = 0.483
14 - - y = 0.653 Switching point
15 - - x = 0.484299
R = 1.755 16 - - Intersection (q,equilibrium)
alpha = 2.5 17 - - x = 0.492
q = 1.195 18 - - y = 0.708
E(ML) = 1 19 - -
# of Stages 11 20 - -
Min. reflux 1.16 Bottoms
Qc -3510493.926 58.82 mol/hr
Qr 4138403.676 0.1 Desired Xw
Points for use on McCabe-Thiele (X-Y) plot - Only one decimal place used for the sake of clarity
x 45 Degree line Equilibrium line Stripping line Enriching line q line Distillation(MT) op equil
0.0 0.0 0.0 0.0 0.0
0.1 0.1 0.2 0.0 0.0
0.2 0.2 0.4 0.0 0.0
0.3 0.3 0.5 0.0 0.0
0.4 0.4 0.6 0.0 0.0
0.5 0.5 0.7 0.0 0.0
0.6 0.6 0.8 0.0 0.0
0.7 0.7 0.9 0.0 0.0
0.8 0.8 0.9 0.0 0.0
0.9 0.9 1.0 0.0 0.0
1.0 1.0 1.0 0.0 0.0
0.5 0.7 0.0 0.0
0.1 0.1 0.0 0.0
0.5 0.7 0.0 0.0
1.0 1.0 0.0 0.0
0.5 0.5 0.0 0.0
0.5 0.7 0.0 0.0
0.0 0.0
0.1 0.1
0.1 0.1
0.1 0.1
0.1 0.3
0.2 0.3
0.2 0.4
0.3 0.4
0.3 0.5
0.4 0.5
0.4 0.6
0.5 0.6
0.5 0.7
0.5 0.7
0.5 0.7
0.6 0.7
0.6 0.8
0.7 0.8
0.7 0.9
0.8 0.9
0.8 0.9
0.9 0.9
0.9 1.0
1.0 1.0
0.0
0.2
0.4
0.6
0.8
1.0
1.2
0.0 2.0
AxisTitle
Axis Title
-80000.0
-60000.0
-40000.0
-20000.0
0.0
20000.0
40000.0
60000.0
80000.0
100000.0
0.0 0.5 1.0 1.5
Horh
Y or X