- Predicting ASTM D93 PMCC flash point from Distillation Data

-

- Predicting ASTM D93 PMCC flash point from Distillation Data

Earlier I had posted an correlation equation of predicting Abel FP (IP 170) with Front end distillation data at my blog on March 25, 2015 as follow:  https://rjpatelioc-petroleum.blogspot.in/2015/03/relationship-between-flash-point-and.html

Predicted Abel FP=0.613*IBP+0.193*T10- 84

The same equation for ASTM D56 - Tag Flash point is

Predicted  Tag FP=0.613*IBP+0.193*T10- 82

In above equations Flash Point and Distillation data are in Centigrade.
Equations are applicable  to Jet A-1 and Kerosene samples and accuracy is up to 60 C.

Now Predicting ASTM D93 PMCC flash point from Initial Boiling Point of Distillation is innovated as follow:

Predicted PMCC FP=0.0092*(TIBP)2 - 2.589*(TIBP) + 236

- FP and IBP figures are in C
- Applicable to Gasoil Samples from 60 C  and above
- FP is manual and Auto D93,  as well as D3828
- Distillation is D86 Manual and Auto & D7345

Accuracy of this equation is very high as can be seen validation against ASTM Proficiency testing program samples of past few years, Comparison given below:  


ASTM PRP No.
IBP manual
Flash Point


D93 actual
Predicted
Difference
DF21010
183.62
55.3
57.9
-2.6
DF21102
173.21
55.5
55.4
0.1
DF21106
184.82
58.5
58.7
-0.3
DF21202
153.74
59.6
58.2
1.3
DF21206
161.67
59.6
61.3
-1.7
DF21210
178.22
59.9
59.3
0.7
DF21302
167.84
61.3
59.9
1.4
DF21306
163.68
62.3
60.6
1.6
DF21310
166.29
63.6
63.6
0.0
DF21402
178.69
63.6
62.4
1.2
DF21406
164.94
65.6
67.1
-1.5
DF21410
171.17
67.3
66.8
0.5
DF21502
162.52
70.2
70.8
-0.6
Df21506
189.1
70.4
71.8
-1.3
DF21510
169.17
77.1
75.4
1.7

Above ASTM PTP data correlated  are from robust mean of hundreds labs and the innovated prediction equation gives so accuracy despite reproducibility of PMCC Flash point and IBP both are about 5 C. The test case will off course depend on how accurately you have determined IBP and D93 Flash Point.

Thus prediction equation is very much useful to verify accuracy of both IBP and PMCC Flash Point and any variation demands recheck of those parameters.

As of now, no other more accurate than above equations can be found on internet. 

The Abel equation was developed way back in 1980s whereas the D93 prediction equation is developed recently.  Some of the available internet references are given below which are much less accurate than above.

Author's Profile

Follow me on twitter @RJPatel13 to get notification when my new post is available in my blog.

http://www.eng-tips.com/viewthread.cfm?qid=178623

http://simulationots.blogspot.in/2013/03/what-are-flash-point-calculation-methods.html

http://www.sciencedirect.com/science/article/pii/S0016236112004358

RJ Patel

Comments

Post a Comment

Popular posts from this blog

- Excel Formula-Density Conversion to 15 deg C, table ASTM 53 B - 1980,

-
Image
- Excel Formula-Density Conversion to 15 deg C,  table ASTM 53 B - 1980,    Excel sheet giving the Density 15 deg C figures from given observed Density and observed temperature for petroleum product as derived from ASTM tables 53 B. Density conversion to 15 deg C matches exactly with the ASTM conversion tables 1980. Lists of Android/iOs Apps developed on Petroleum Calculation - see here.      (These apps convert Density/API gravity exactly as per ASTM tables 5a, 5b, 6a, 6b, 23a,23b, 24a,24b, 53a,53b, 54a,54b to standard temperature 15 C,  20 C and 60 F.)   Example:  Observed density is 792 kg/Cu. M and observed temperature is 29 deg C. Corresponding 15 deg C for this set of data comes 802.2  kg/Cu. M Excel Worksheet - green color cells  observed density and observed sample temperature are variables and Red color digits are the answer - density at 15 deg C.  Apps developed on Petroleum Calculations - see here. Density Conversion from observed temperature to 15 deg C us
Read more

Density conversion to any temperature say 20 C, 15 C or any desired temperature from any observed temp

-
Image
Density conversion to any temperature say 20 C, 15 C or any desired temperature from any observed temp Some of the countries like Russian block follow standard temperature 20 deg C as compared to Commonwealth countries which have standard temperature 15 deg C.  The calculator developed for conversion of Density from observed temperature to 20C or 15C or any desired temperature is thus very handy.   It may be noted that the calculator is for finished petroleum products and uses ASTM tables 1952 version for this conversion. For Excel Worksheet you may contact by email to  rjpatelioc2014@gmail.com and specify your clear requirement as per the title of this post. Follow me on twitter @RJPatel13 to get notification when my new post is available in my blog. Author's Profile List of all blog articles on Petroleum QC  by RJ Patel.
Read more

- Temperature around 15 deg C, - Density Conversion for Petroleum Products from observed temperature to 15 C without use of ASTM Table (1980 series)

-
- Temperature around 15 deg C,    - Density Conversion for Petroleum Products from observed temperature to 15 C without use of  ASTM Table List of all blog articles on Petroleum QC  by RJ Patel. Lists of Android/iOs Apps developed on Petroleum Calculation - see here.      (These apps convert exactly as per ASTM tables 5a, 5b, 6a, 6b, 23a,23b, 24a,24b, 53a,53b, 54a,54b to standard temperature 15 C,  20 C and 60 F.) One follower from Kiev, Ukraine  has requested the formula for the subject conversion. The post gives a simple way to convert Density of petroleum products from ambient temperature  ( say 15 +/-7  deg C  )  to density at 15 Deg C, in line with ASTM table 53B,  without using these table and in the field with simple calculation. See my earlier post dated 18 Dec 2016, for detail description of the procedure explained there. For areas in Norther Europe,  Canada,  Russia,  China and southern hemisphere New Zealand,  Southern Australia etc  where winter t
Read more

Android/iOS apps for Petroleum Calculation

-
List of Android/iOS apps on Petroleum Calculation  App for Jet A-1 Density Conversion to 15 deg C as per ASTM 53B  App for Aviation products Density Conversion to 20 deg C as per ASTM 53B     App for Petroleum Products Density Conversion to 15 Deg C as per ASTM 53B  App for Gasoline - Diesel for Density Conversion to 20 Deg C as per ASTM 53B     App for Crude Oil Density Conversion as per ASTM 53A and Volume correction as per ASTM 54A  Crude Oil  API Gravity Conversion  to 60 deg F and Volume Calculation App as per  Petroleum tables ASTM 5A and 6A Petroleum Products API Gravity Conversion  to 60 deg F and Volume Calculation App as per  Petroleum tables ASTM 5B and 6B.   LPG density Conversion from observed temperature to 15 C and also to 20 C.   An App for Calculation of Vapor pressure of Liquefied Petroleum (LP) Gases from Compositional Analysis based on ASTM D2598.    An App for calculation of Relative Density of LPG from Compositional Analysis based on
Read more