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Astm D-285 Hydrocarbon
#1
Posted 25 August 2015 - 08:53 PM
#2
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ASTM D285 is a very old method that was withdrawn already in 1985, see ASTM website: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
Posted 28 August 2015 - 08:20 PM
Thank Ping Pong! your answer help me a lot!
CBO
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