Excel library for process calc's including distillation

[Almart]

thanks dbert,
it's the classical azeotropic distillation for separating ethanol from water with the help of benzene, feed is 95% weight alcohol.
Prode works well at low pressure (2 Bar) and at that pressure I can use a model based on activity (NRTL), however I wish to simulate the column at higher pressure and set a purity.
I think to use a complex mixing rule for VLE (Peng Robinson + NRTL , Wong Sandler mixing rule) and LKP for enthalpy.
I am quite interested to evaluate the results.

[dbert]

azeotropic distillation interest mee, too.
I have not simulated ethanol water separation, however I suspect VLE with EOS and complex mixing rules will be more difficult to converge than ideal + NRTL model.

[Almart]

yes, with complex mixing rules solving a distillation column is a very slow process,
in some cases it doesn't converge and one must be careful,
I wish to compare different methods,
as far I have found little differences at low pressures, at high pressures things are much more complex, as said.

[carlo.stenali]

I have been informed that there is a maintenance version of Prode Properties available for download from "http://www.prode.com"
Among other things as a large BIPs data bank there are some new models as ISO 18453 (GERG 2004) the ISO standard for calculating VLE of water in natural gas mixtures...

[rense]

thanks,
I work in natural gas industry and these models are useful.

[rense]

I did a little testing and I would say that there are several interesting features, GERG support is good as that is becoming the standard for natural gas properties but I see also a large databank for BIPs (which covers all standard models) and several other interesting things.

[carlo.stenali]

Prode Properties version 1.18 did support ISO 18453 and GERG 2008 however these models were available only in extended versions, now base version does include ISO 18453 and a large collection of BIPs (more than 22000 data sets)

[mderra]

thanks Carlo,
it seems that Prode has a leading product for natural gas applications, Properties includes the most used models, SRK, PR, AGA and GERG plus all the models for chemical's applications and a large number of BIPs.
Nice software.

[ruudoleo]

If i wan't to download one of those files i get a avast warning (win32:malware-gen high risk).
Don't know what it does but be carefull certainly from a company internet connection.
warning comes at the code download?aspxfname=ppp.exe|>{app}\proindex.exe

[carlo.stenali]

ruudoleo,
have you got the software from "www.prode.com" site ?
You can do as I did :
1) download the software from prode and install on computer,
2) then do a online scan in different sites for the file proind.exe which you mentioned,
I have tested the file in three different sites and I attach one result (from "http://virusscan.jotti.org/") no problems at all for 20 different antivirus,
perhaps there is something wrong in your system
(I do not know Avast but when more than 50 well know tools say there are no problems I would suspect the problem is in the tool which says different...)
Carlo

[mrbabu]

dear sir,
are bipolar interaction parameters calculated from experimental data or with predictive methods ?
Thank you,
MrBabu

[carlo.stenali]

MrBabu,
BIPs in Prode Properties have been calculated from the experimental data available in DECHEMA and DDB, Base version of Prode Propertie includes (according the developer) more than 23000 BIPs which is a number larger than much more expensive process simulators.
You may read this page (or twitter post) for additional information
"http://www.facebook.com/pages/Prode/174678329259944"