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From http://www.et.byu.edu/groups/uolab/files/aspentech/A_short_primer_for_using_AspenPlus.doc
Summary of Aspen Property Methods
Ideal Property Methods
Ideal Property Method | K-Value Method |IDEAL | Ideal Gas/Raoult's law/Henry's law |
SYSOP0 | Release 8 version of Ideal Gas/Raoult's law |
Equations of State
Abbreviation | Equation of State |
Lee-based Methods |
BWR-LS | BWRLee-Starling |
LK-PLOCK | Lee-Kesler-Plöcker |
Peng-Robinson-based Methods |
PENG-ROB | Peng-Robinson |
PR-BM | Peng-Robinson with Boston-Mathias alpha function |
PRWS | Peng-Robinson withWong-Sandler mixing rules |
PRMHV2 | Peng-Robinson with modified Huron-Vidal mixing rules |
Redlich-Kwong-based Methods |
PSRK | Predictive Redlich-Kwong-Soave |
RKSWS | Redlich-Kwong-Soave withWong-Sandler mixing rules |
RKSMHV2 | Redlich-Kwong-Soave with modified Huron-Vidal mixing rules |
RK-ASPEN | Redlich-Kwong-ASPEN |
RK-SOAVE | Redlich-Kwong-Soave |
RKS-BM |Redlich-Kwong-Soave with Boston-Mathias alpha function |
Other Methods |
SR-POLAR | Schwartzentruber-Renon |

Activity Coefficient Methods
Abbreviation | Liquid Activity Coefficient | Vapor FugacityCoefficient |
Pitzer-based Methods |
PITZER | Pitzer | Redlich-Kwong-Soave |
PITZ-HG | Pitzer | Redlich-Kwong-Soave |
B-PITZER | Bromley-Pitzer | Redlich-Kwong-Soave |
NRTL-based Methods |
ELECNRTL| Electrolyte NRTL | Redlich-Kwong |
ENRTL-HF | Electrolyte NRTL | HF Hexamerization model |
ENRTL-HG | Electrolyte NRTL | Redlich-Kwong |
NRTL | NRTL | Ideal gas |
NRTL-HOC | NRTL |Hayden-O'Connell |
NRTL-NTH | NRTL | Nothnagel |
NRTL-RK | NRTL | Redlich-Kwong |
NRTL-2 | NRTL (using dataset 2) | Ideal gas |
UNIFAC-based Methods |
UNIFAC | UNIFAC | Redlich-Kwong |
UNIF-DMD| Dortmund-modified UNIFAC | Redlich-Kwong-Soave |
UNIF-HOC | UNIFAC | Hayden-O'Connell |
UNIF-LBY | Lyngby-modified UNIFAC | Ideal gas |
UNIF-LL | UNIFAC for liquid-liquid systems |...
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