3 replies to this topic

[barks123]

Hello everyone,

can I compare the differences of the two methods?

How do you compare the two methods?

 

thx

[Pilesar]

ASTM 2887 is for heavier petroleum cuts that need to distill under vacuum conditions to avoid too high temperatures. ASTM D86 is better for lighter cuts. ASTM 2887 is supposed to mimic a true boiling point curve using gas chromatography. Both of these are actual lab test procedures. It is rare to have results from both tests for the same sample. For modelling, use what you have available. The results are generally close enough. You can find the lab procedures and read them -- they are very specific and some more trouble than others.

Edited by Pilesar, 15 March 2024 - 10:50 AM.

[barks123]

How do I verify the method using gc simdis for ASTM D2887 in my laboratory?

[Pilesar]

I don't understand the question about verification. For simulation, the D2887 results can be entered directly as representing the mass fraction basis of a stream. There are also conversion formulas which try to convert D2887 results, similar to D86 conversion formulas. Crude oil contains many hundreds of components and is usually represented by boiling point curve, gravity curve, and other property curves that characterize the stream. I've never seen the D2887 test performed. Is there no standard sample to use for verification in the lab?