|
(Features)
1. High accuracy VLE
measurements.
2. Simple operation and high productivity.
3. Composition analysis are not required.
4. Wide operating range(0.1kPa-15MPa,40-150C).
5. Integration with DDB, the world's largest
databank of physical properties. |
(Applicability)
1. Vapor-liquid equilibria.
2. Saturated vapor pressures.
3. Activity coefficients at infinite dilution.
4. Vapor-liquid-liquid equilibria. |
(Introduction)
VLE AUTOLAB was developed by a collaboration
with Mitsubishi Chemical Corp. (MCC) and the
university of Oldenburg, Germany.
Vapor-liquid equilibrium data(VLE) are essential
for development and design of chemical processes.
Traditional measurements of VLE are, however,
very time-consuming and require highly skilled
work.
VLE AUTOLAB is a fully automated system which
allows measurement of VLE data simply, quickly,
accurately and is also suitable for measurements
of pure component vapor pressures, activity
coefficients at infinite dilution, and 3-phase
vapor-liquid-liquid equilibria.
VLE AUTOLAB is a fully computer-controlled
apparatus featuring superior performance in
terms of accuracy and time (see Table below).
The VLE measurements are very cost efficient
and require only minimal amounts of pure components
and significantly reduced work.
VLE AUTOLAB is provided with an integrated
system which uses the Dortmund Data Bank Software
Package(DDBSP) for data processing and evaluation.
VLE measurements can be readily compared with
a large variety of literature data stored
in the Dortmund Data Bank (DDB),the world's
largest databank of physical properties. Similarly,
new VLE data can be correlated by a variety
of thermodynamic models and compared with
results of established predictive methods,
such as the UNIFAC(Do) group contribution
method. |
Time requirements
and accuracy of VLE measurements
(Based
on |
|
VLE measurement |
Time requirements (Actual manual operation)
|
|
| Operation mode |
Number of data
|
VLE AUTOLAB
|
Rose-Williams
still |
Othmer-type
still |
|
Isothermal
|
32 data points
|
0.5 day
(1 hr) |
12 days
(72 hrs) |
16 days
(112 hrs) |
|
5 isotherms
|
16 points/
isotherm |
3 days
(1 hr) |
30 days
(180 hrs) |
40 days
(280 hrs) |
|
Accuracy
|
Temperature
Pressure
Composition |
0.03
K
0.01 kPa
0.01 % |
0.05
K
0.02 kPa
1 % |
1.0
K
0.3 kPa
5 % |
|
|
