7 replies to this topic

[liuzp308]

How to convert ASTM D86 to TBP?

[ankur2061]

How to convert ASTM D86 to TBP?

Hi,

Check out this link for an old post. Could provide you some starting point.

http://www.cheresour...__1

Regards,
Ankur

[Profe]

Hi Liuz

About your inquire:
Transform ASTM D 86 distillation cuts to ASTM 2892 (TBP) light cuts

The results of ASTM D 86 distillations can be converted into an atmospheric ASTM 2892 TBP by using an equation equivalent proposed by Riazi and published by the API

Equation 1: T* = aT^b
With:
T* = Temperature of TBP test [ºK]
T = Temperature distillation D 86 [ºK]
a, b = Constants depending on the fraction distilled.
Application Example:
Distillation ASTM D86 to TBP (Riazi Method)
Volume % distilled Coefficient a Coefficient b Temperature D86 ºC Temperature TBP ºC
0 0,9177 1,0019 36,5 14,1
10 0,5564 1,0900 54,1 33,4
30 0,7617 1,0425 76,9 68,9
50 0,9013 1,0176 101,5 101,6
70 0,8821 1,0226 131,0 135,1
90 0,9552 1,0110 171,0 180,5
95 0,8177 1,0355 186,5 194,1

The accuracy of method depends on the smoothness of curve. Errors affect the points in the low % distilled ranges. Average error is in order of 5 °C for smooth curve.
Wauquier pp 98-104.

Transformation of atmospheric TBP curve to ASTM D 86
API recommends a relationship established by Riazi (1982)

Equation 2: T* = aT^b
With:
T = Temperature TBP [K]
T* = Temperature of ASTM D 86 [K]
a, b = Transformation Coefficients (See application example)

Application Example:

Distillation TBP to ASTM D86. Table 4.16a Wauquier
Volume % distilled Coefficient a Coefficient b Temperature TBP ºC Temperature D86 ºC
0 1,08947 0,99810 14,1 36,5
10 1,71243 0,91743 33,4 54,1
30 1,29838 0,95923 68,9 76,9
50 1,10755 0,98270 101,6 101,5
70 1,13047 0,97790 135,1 131,0
90 1,04643 0,98912 180,5 171,0
95 1,21455 0,96572 194,1 186,5

Source:
Petroleum Refining Volume 1: Crude oil Petroleum Products,”by Jean Pierre Wauquier. Institut Francais du Pétrole. Editions Technip. pp 98-104.

The application examples in Excel file I will send you attached here.


I think this information will be useful for you.
Good luck.

Edited by Profe, 17 March 2010 - 02:49 PM.

[Profe]

Hi Liuz

That I said before, attached you find the Word and Excel files about this subject How To Convert Astm D86 To Tbp.

Good luck.

Attached Files

•  ASTM D86 to TBP.xls   31.5KB   1614 downloads
•  ASTM D86 to TBP.pdf   173.32KB   1329 downloads

[suhas]

I will suggest you should use Edmister graphs to conver D86 to TBP. These curves are avalibale in many petroleum processing books as well as in Petroleum thermodynamic by Edminster

[Profe]

Hi Luiz.

According with the Suhas suggestion, attached is the copy of Edmister curve in format JPG for this purpose. The source is the Perry and Green "Perry's Chemical Engineers' Handbook" by McGraw-Hill Companies. P. 13-89 figure 13-86.
Is your choice select the best method that fits your needs or verify the source.

I think that information will be useful.

Good luck.

Attached Files

•  Astm D86 to TBP.JPG   117.14KB   409 downloads

Edited by Profe, 22 March 2010 - 03:11 PM.

[AJ6286]

How to convert ASTM D86 to TBP?

Use the API Technical Data Book, the best source in case you want to do any distillation interconversion. Its available at www.epcon.com

AJ

[araz59]

hi
have anyone pdf format of Edmister book?