2 replies to this topic

[Mehrbod]

Hello every body.

I have a problem in aspen plus. I need to draw the ternary diagram of triolein, stearic acid, and ethanol. I import the molecule structure of triolein and also strearic acid. aspen can run without error but it is not able to draw the ternary for liquid liquid diagram (it give a table for temperature below 40 F). when I changed triolein with other substance (water) its works it shows table of 3 components.

thanks for you advice

Edited by Mehrbod, 25 September 2012 - 12:46 PM.

[xavio]

Hi Mehrbod,

Please try to type correctly and consistently: teriolein or triolein? stearic acid or trearic acid?
Do you know pure component properties of the two?
To do fluid phase equilibrium prediction, apart from molecular formula, you will need at least boiling point and vapor pressure data.

Thanks.

xavio

[Mehrbod]

I assumed the vapor pressure of Triolein and Tristearin are same. I found data for Tristearin then I found the Antoine equation for that. this equation is imported to the aspen plus.

Aspen could not give any data by UNIFAC, but with NRTL it gave me equilibrium data for any temperature. Still it does not able to draw the plot because of "invalid variable name"!!!

Thank you Xavio