4 replies to this topic

[smalawi]

Hi,

I have used pro 2 to simulate crude inspection properties such as sulfur, CCR, Metals, pour pt... in distillation columns by inputting the assay data of the crudes. The results were resnobly ok

I understand that Hysys can use user property data in a crude assay data and that should be able to do the same pridictions for oil fraction sulfur content after a distillation column.

could you please share your experiance in this, i'm trying to pridict refinery inspection data such as sulfur, ccr, pour, in hysys after a distillation column. have anyone tried this ?

i have typically used petrosim in my pervious job, but dont have acess to it now and cant use pro 2. Hysys is my only option

thanks for your feedback,

regards,

sm

[Zauberberg]

I have used sulfur distribution curves based on available crude assay data and the results from HYSYS are quite good in my opinion, for all CDU products. Petro-SIM works on the same principle. The only difference is that it is more refinery-user-oriented (compared to HYSYS), but the basic flowsheeter and oil environment are the same.
Sulfur is usually determined in all fractions during TBP experiment so it is not a problem to generate consistent set of input data for HYSYS.

The same should be applicable for Concarbon and heavy metals, although they are measured only for heavy distillates (usually starting from HGO, residue, LVGO and HVGO). Try to generate these curves in the same way you are doing for sulfur.

As far as pour point is concerned, I guess you also observed that values predicted by HYSYS are very much far away from measured values. It is famous and old weakness of Aspen software - physical properties prediction. I don't know what would happen if you enter these (measured values) as user property - based on laboratory data - and watch for the outputs. The principle of generating these curves should be the same as for sulfur and CCR/metals, but the mixing rule you apply could be a challenge in obtaining reasonable predictions.

Best of luck,

[smalawi]

Zauberberg,

thanks for the reply, its very promising if the results were that accurate. I guess i will try to use the assay data and compare with pro 2/ actual cuts, my situation might be deferent !

my first guess is, if its shtright froward to model sulfur/ccr/metals ... in hysys they whay they invented hysys refinery/refysys/ pertosim.... just for the money ??

pro 2 is an old software and it does not have any "speicial" abilites that cant be incorporated into hysys, the mixing rules in pro 2 should be trasferable to hysys by simple programming, however, after aspen tookover hysys, i cant say there have been any "real" improvement to it.

kbc have improved on hysys in petrosim. they changed few things that i long asked for in hysys. the speadsheet in petrosim is very good and comparable to excel after the update. it also has many features that are very useful.


thanks again,

regards,

sm

[Zauberberg]

my first guess is, if its shtright froward to model sulfur/ccr/metals ... in hysys they whay they invented hysys refinery/refysys/ pertosim.... just for the money ??

I believe this was the main reason for "sharing" copyrights. Today, even Honeywell is part of the game with UniSIM Design software. It looks like HYSYS, it has the same solving algorhytms, the only advantage is improvement in liquid densities correlations and special DCS link improvements provided for operator training purposes. To be honest, I never understood how several different companies can sell the same software under different trademark names.

Petro-SIM is slightly different in the sense it provides in-built moduls of various refinery/petrochemical reactor systems which are impossible to model in a common flowsheeter environment, such are the ones in HYSYS or Pro/II. They are available as standard unit operations - you are probably familiar with this stuff - and linked with Excel files for the purpose of calibration. For modeling refinery units, I think Petro-SIM is the best software suite you can find on the market.

[smalawi]

Actually, in the latest petro-sim, the reactor models / calibration tools are integrated into the flowsheeting enviroment. its much faster and stable than before.

you dont have to go back and fourth between excel and petro-sim. most of the things are done in petrosim and the results are easly exported to a shred database file or excel .

they have really improved on the original hysys scope and my guess is they will keep improving on it.

on the other hand, honeywell still dont have a support site for unisim !