Class TBPfractionModel.RiaziDaubert

java.lang.Object

neqsim.thermo.characterization.TBPfractionModel.TBPBaseModel

neqsim.thermo.characterization.TBPfractionModel.PedersenTBPModelSRK

neqsim.thermo.characterization.TBPfractionModel.RiaziDaubert

All Implemented Interfaces:

Serializable, Cloneable, TBPModelInterface

Enclosing class:

TBPfractionModel

public class TBPfractionModel.RiaziDaubert
extends TBPfractionModel.PedersenTBPModelSRK

Riazi-Daubert (1980) property estimation method.

The Riazi-Daubert correlations use a simple exponential-power law form that relates critical properties to molecular weight (M) and specific gravity (SG). This model is particularly effective for light to medium petroleum fractions with molecular weights below 300 g/mol.

Key Correlations:

Critical Temperature:

T_c = (5/9) × 554.4 × exp(-1.3478×10^-4·M - 0.61641·SG) × M^0.2998 × SG^1.0555

Critical Pressure:

P_c = 0.068947 × 4.5203×10⁴ × exp(-1.8078×10^-3·M - 0.3084·SG) × M^-0.8063 × SG^1.6015

Boiling Point:

T_b = 97.58 × M^0.3323 × SG^0.04609

Applicability:

• Molecular weight: 70-300 g/mol (light to medium fractions)
• Specific gravity: 0.65-0.90
• Falls back to Pedersen model for MW > 300 g/mol

Notes:

The acentric factor is calculated using the Kesler-Lee correlation with switchover at T_br = 0.8. The model does not calculate the EOS m-parameter directly (calcm = false).

Reference: Riazi, M.R. and Daubert, T.E. (1980). "Simplify Property Predictions." Hydrocarbon Processing, 59(3), 115-116.

Version:

$Id: $Id

Author:

ESOL

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
private static final long	serialVersionUID	Serialization version UID.

Fields inherited from class TBPfractionModel.PedersenTBPModelSRK

TBPfractionCoefOil, TBPfractionCoefs, TBPfractionCoefsHeavyOil, TPBracketcoefs

Fields inherited from class TBPfractionModel.TBPBaseModel

calcm

Constructor Summary

Constructors

Constructor	Description
RiaziDaubert()

Method Summary

Modifier and Type	Method	Description
double	calcAcentricFactor(double molarMass, double density)	calcAcentricFactor.
double	calcAcentricFactor2(double molarMass, double density)
double	calcPC(double molarMass, double density)	calcPC.
double	calcTB(double molarMass, double density)	calcTB.
double	calcTC(double molarMass, double density)	calcTC.

Methods inherited from class TBPfractionModel.PedersenTBPModelSRK

calcm, calcRacketZ

Methods inherited from class TBPfractionModel.TBPBaseModel

calcAcentricFactorKeslerLee, calcCriticalViscosity, calcCriticalVolume, calcParachorParameter, calcWatsonCharacterizationFactor, getBoilingPoint, getName, isCalcm, setBoilingPoint

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

serialVersionUID

private static final long serialVersionUID

Serialization version UID.

See Also:

• Constant Field Values

Constructor Details

RiaziDaubert

public RiaziDaubert()

Method Details

calcTC

public double calcTC(double molarMass,
 double density)

calcTC.

Specified by:

calcTC in interface TBPModelInterface

Overrides:

calcTC in class TBPfractionModel.PedersenTBPModelSRK

Parameters:

molarMass - a double

density - a double

Returns:

a double

calcPC

public double calcPC(double molarMass,
 double density)

calcPC.

Specified by:

calcPC in interface TBPModelInterface

Overrides:

calcPC in class TBPfractionModel.PedersenTBPModelSRK

Parameters:

molarMass - a double

density - a double

Returns:

a double

calcAcentricFactor2

public double calcAcentricFactor2(double molarMass,
 double density)

calcTB

public double calcTB(double molarMass,
 double density)

calcTB.

Specified by:

calcTB in interface TBPModelInterface

Overrides:

calcTB in class TBPfractionModel.PedersenTBPModelSRK

Parameters:

molarMass - a double

density - a double

Returns:

a double

calcAcentricFactor

public double calcAcentricFactor(double molarMass,
 double density)

calcAcentricFactor.

Specified by:

calcAcentricFactor in interface TBPModelInterface

Overrides:

calcAcentricFactor in class TBPfractionModel.TBPBaseModel

Parameters:

molarMass - a double

density - a double

Returns:

a double