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Astm D-285 Hydrocarbon

astm d-285 hysys simulation destillation curve

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#1 CBO

CBO

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Posted 25 August 2015 - 08:53 PM

 
 
I have a distillation curve oil, ASTM D-285, but Hysys don´t have this method to estimate the thermodynamic properties.
As I can do to estimate it with the values of ASTM-D-285 curve in HYSYS?
 
thank you!!


#2 PingPong

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Posted 26 August 2015 - 07:00 AM

ASTM D285 is a very old method that was withdrawn already in 1985, see ASTM website:

http://www.astm.org/Standards/D285.htm

 

The book Refinery Engineering by Chang et al states following:

 

"The true boiling point (TBP) distillation of a crude oil or petroleum fractions
results from using the U. S. Bureau of Mines Hempel method and the ASTM
D-285 test procedure. Neither of these methods specifies the number of theoretical
stages or the molar reflux ratio used in the distillation. Consequently, there is a
trend toward applying a 15:5 distillation according to ASTM D2892, instead of the
TBP. The 15:5 distillation uses 15 theoretical stages and a molar reflux ratio of 5."

 

In other words: D285 is an oldfashioned TBP distillation that is no longer used and replaced by D2892.

 

I suggest you assume therefor that your D285 curve is a TBP curve and enter it as such in your simulator.



#3 CBO

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Posted 28 August 2015 - 08:20 PM

Thank Ping Pong! your answer help me a lot!

 

CBO






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