Aspen Plus tutorial (2) – physical property analysis

When we design the process of distillation, extraction and reaction, we often need to know the vapor-liquid equilibrium and liquid-liquid equilibrium relationship of each component, as well as the basic properties of the system such as density, viscosity and vapor pressure. These properties can be analyzed by Aspen Plus / tools / analysis tools to analyze the physical properties of pure components, binary components, ternary mixtures or a certain logistics.

Example: chloroform / acetone / water system, physical method NRTL.

① The relationship between vapor pressure and temperature of chloroform was analyzed in the range of 20 ~ 100 ℃;

② The vapor-liquid equilibrium of acetone / water system at 1atm was analyzed;

③ The liquid-liquid equilibrium of ternary system was analyzed.

Firstly, the components were input and NRTL was selected as the physical property method

① The relationship between vapor pressure and temperature of chloroform was analyzed in the range of 20 ~ 100 ℃

Click pure in home

Finally, the running results

The specific vapor pressure can be viewed in results

② The vapor-liquid equilibrium of acetone / water system at 1atm was analyzed

Click binary in home

Click Run Analysis to generate T-X-Y curve.

You can also view the detailed data in results.

③ The liquid-liquid equilibrium of ternary system was analyzed

Click terriary diag to enter the ternary system analysis system, and click Find azeotropes

Select three components

View results through report

Click azetropes to see the temperature and composition summary of the three azeotropic points

Exercise 2:

Aspen Plus was used to predict the azeotropic composition (mass fraction) of ethanol / water binary system at 1atm, and the physical property method was nrtl-rk.

You can reply to the “APquestion2” in the weixing MP (PVDesign).

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