1. VLE using EOS in Aspen Plus® v8.8
CHEN 354
Texas A&M University

2. Methanol(1) + Water (2)
Use the Peng-Robinson (PR) equation of state to model the VLE behavior of a binary mixture containing methanol and water at K in Aspen Plus:
Property analysis method (Pxy diagram)
Simulation method: find dew point of equimolar mixture
Estimate the binary parameter for the PR equation of state by performing a regression on data retrieved from the Aspen databases. Generate a Pxy diagram.

3. Open Aspen Plus® and add the components methanol (1) – water (2)

4. Select PENG-ROB as the method to model the system

5. a. Property Analysis. Input the information and click on Run analysis

6. a. Property Analysis: Pxy Diagram

7. a. Property Analysis: tabulated results.

8. b. Simulation method. Create a Flash2 and enter the input information: temperature and vapor fraction. Make sure the mole fraction box under Setup>Report Options> Stream is checked

9. b. Simulation method. Enter input information about the feed stream and run simulation

10. b. Simulation method. Results

11. c. Create a new data set and retrieve binary data from database
c. Create a new data set and retrieve binary data from database. Click save data

12. c. Create new regression and set up input as shown below
c. Create new regression and set up input as shown below. Click run and check results

13. c. Regression results