8 replies to this topic

[panoska]

Hello everyone!
I try to find the acentric factor of a stream in Aspen Plus. But, it is not available.
Do you know what I need to do to search for the acentric factor?

[breizh]

Hi,

Acentric factor of a stream? please explain your objective.

Breizh 

[latexman]

Is the stream a mixture or a pure component? IIRC, acentric factor is a pure component property.

[panoska]

Actually, it is a mixture of several components.

[breizh]

Hi,

are you talking about a pseudo component?

Breizh

[panoska]

Hi,
Breizh the stream includes also components that do not exist in data bank (which means pseudocomponent). However, I have defined some properties.

[breizh]

Hi,

Useful data bank, free :

 

화학공학소재연구정보센터(CHERIC) | 연구정보 | KDB | Pure Component Properties

 

Breizh

[PaoloPemi]

I am not familiar with Aspen however you can apply mixing rules to many properties,
normally acentric factors are available in databanks (as noted by latexman and breizh) for pure components and estimated for pseudocomponents...
from those values the software can apply some mixing rules and calculate (pseudo) values for mixtures...
as example I attach a screenshot showing the value calculated by Prode Properties in Excel for a 4 components mixture (with std. mixing rule),

I would guess that Aspen has an equivalent feature...

 

Attached Files

•  streamacentricfactor.png   66.83KB   0 downloads

[panoska]

Thank you for your replies!!!