Generating a Txy Diagram

You can use the Aspen Plus analysis capability before input

specifications are complete. Note the Required Input Incomplete

message on the status bar.

Aspen Plus can generate four types of property analysis: pure,

binary, residue, and stream. However, with the given input, only

pure and binary analyses are available.

In this simulation, study VLE behavior of the acetone-chloroform

binary system, so you can perform a binary analysis.

The relevant literature values are:

Acetone boiling point 56 °C

Chloroform boiling point 61 °C

Acetone-chloroform azeotrope 64.5 °C

(From Mass-Transfer Operations, Treybal, 3rd Ed., McGraw - Hill,

p. 356, and from Properties of Gases and Liquids, Reid, Sherwood

and Prausnitz, 3rd Ed., McGraw - Hill, Chapter 9.)

1 From the Aspen Plus menu bar, select Tools | Analysis |

Property | Binary.

The Binary Analysis dialog box appears.

2 In the Analysis type field, click to view the types of

analysis available.

As the prompts indicate, Txy and Pxy analysis are used to study

nonideality of vapor - liquid systems to check for azeotrope

formation. Gibbs energy of mixing analysis is used to see if the

system will form two liquid phases.

3 Select Txy.

The fields in this dialog box are filled with default options all of

which are correct for this example.

4 Click Go to apply the defaults and start the analysis.

Дата добавления: 2015-08-20