Information Technology Reference
In-Depth Information
b
12
=
95
.
2601793
b
13
=−
530
.
14039
b
31
=−
35
.
602627
b
23
=−
1
.
3683628
b
32
=−
253
.
9741
Parameters obtained using the full data set initialized with the values above are
b
12
=
1892
.
22192
b
12
=
136
.
837046
b
13
=−
461
.
75675
b
31
=−
68
.
070246
b
23
=
12
.
3152652
b
32
=
2285
.
7669
All the methods described give passable results, and careful comparison of results
with the composition range of the process would facilitate a choice of parameters.
Aspen Plus's Plot Wizard offers several possibilities for viewing experimental and
calculated values of the variables. An example is shown in Figure 6.6. Details of the
Aspen Plus regressions above are available at Examples/lle method one one point,
Examples/lle method one two parameters fixed, Examples/lle method two one point,
and Examples/lle method two.
6.6 WORKSHOPS
In preparation for the workshops it would be advisable to read the Aspen Plus documen-
tation dealing with the activity coefficient models van Laar, Wilson, NRTL, Uniquac,
Figure 6.6
Triangular plot of LLE data of an
n
-hexane - ethanol - acetonitrile system.
