VLL equilibria and critical end points calculation of nitrogen-containing LNG systems: Application of SRK and PC-SAFT equations of state

Edgar Ramírez-Jiménez; Daimler N. Justo-García; Fernando García-Sánchez; Roumiana P. Stateva

doi:10.1021/ie300372a

VLL equilibria and critical end points calculation of nitrogen-containing LNG systems: Application of SRK and PC-SAFT equations of state

Edgar Ramírez-Jiménez, Daimler N. Justo-García, Fernando García-Sánchez, Roumiana P. Stateva

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Abstract

Two different numerical techniques, applying either the SRK or the PC-SAFT equations of state, were used to predict the multiphase behavior exhibited by the ternary systems nitrogen + methane + ethane, nitrogen + methane + propane, and nitrogen + methane + n-butane. The predictions with both equations of state were compared against experimental data in terms of nitrogen mole fractions of the two liquid phases and it was demonstrated that the agreement is good. Furthermore, a procedure similar to that reported by Gregorowicz and de Loos, in conjunction with the SRK equation of state, was introduced. It was applied to predict the K (L ₁-L ₂=V) and LCST (L ₁=L ₂-V) critical end points at constant temperature for the systems studied, and demonstrated a reliable and robust performance with good convergence characteristics.

Original language	English
Pages (from-to)	9409-9418
Number of pages	10
Journal	Industrial and Engineering Chemistry Research
Volume	51
Issue number	27
DOIs	https://doi.org/10.1021/ie300372a
State	Published - 11 Jul 2012
Externally published	Yes

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title = "VLL equilibria and critical end points calculation of nitrogen-containing LNG systems: Application of SRK and PC-SAFT equations of state",

abstract = "Two different numerical techniques, applying either the SRK or the PC-SAFT equations of state, were used to predict the multiphase behavior exhibited by the ternary systems nitrogen + methane + ethane, nitrogen + methane + propane, and nitrogen + methane + n-butane. The predictions with both equations of state were compared against experimental data in terms of nitrogen mole fractions of the two liquid phases and it was demonstrated that the agreement is good. Furthermore, a procedure similar to that reported by Gregorowicz and de Loos, in conjunction with the SRK equation of state, was introduced. It was applied to predict the K (L 1-L 2=V) and LCST (L 1=L 2-V) critical end points at constant temperature for the systems studied, and demonstrated a reliable and robust performance with good convergence characteristics.",

author = "Edgar Ram{\'i}rez-Jim{\'e}nez and Justo-Garc{\'i}a, {Daimler N.} and Fernando Garc{\'i}a-S{\'a}nchez and Stateva, {Roumiana P.}",

year = "2012",

month = jul,

day = "11",

doi = "10.1021/ie300372a",

language = "Ingl{\'e}s",

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journal = "Industrial and Engineering Chemistry Research",

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VLL equilibria and critical end points calculation of nitrogen-containing LNG systems: Application of SRK and PC-SAFT equations of state. / Ramírez-Jiménez, Edgar ; Justo-García, Daimler N.; García-Sánchez, Fernando et al.
In: Industrial and Engineering Chemistry Research, Vol. 51, No. 27, 11.07.2012, p. 9409-9418.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - VLL equilibria and critical end points calculation of nitrogen-containing LNG systems

T2 - Application of SRK and PC-SAFT equations of state

AU - Ramírez-Jiménez, Edgar

AU - Justo-García, Daimler N.

AU - García-Sánchez, Fernando

AU - Stateva, Roumiana P.

PY - 2012/7/11

Y1 - 2012/7/11

N2 - Two different numerical techniques, applying either the SRK or the PC-SAFT equations of state, were used to predict the multiphase behavior exhibited by the ternary systems nitrogen + methane + ethane, nitrogen + methane + propane, and nitrogen + methane + n-butane. The predictions with both equations of state were compared against experimental data in terms of nitrogen mole fractions of the two liquid phases and it was demonstrated that the agreement is good. Furthermore, a procedure similar to that reported by Gregorowicz and de Loos, in conjunction with the SRK equation of state, was introduced. It was applied to predict the K (L 1-L 2=V) and LCST (L 1=L 2-V) critical end points at constant temperature for the systems studied, and demonstrated a reliable and robust performance with good convergence characteristics.

AB - Two different numerical techniques, applying either the SRK or the PC-SAFT equations of state, were used to predict the multiphase behavior exhibited by the ternary systems nitrogen + methane + ethane, nitrogen + methane + propane, and nitrogen + methane + n-butane. The predictions with both equations of state were compared against experimental data in terms of nitrogen mole fractions of the two liquid phases and it was demonstrated that the agreement is good. Furthermore, a procedure similar to that reported by Gregorowicz and de Loos, in conjunction with the SRK equation of state, was introduced. It was applied to predict the K (L 1-L 2=V) and LCST (L 1=L 2-V) critical end points at constant temperature for the systems studied, and demonstrated a reliable and robust performance with good convergence characteristics.

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U2 - 10.1021/ie300372a

DO - 10.1021/ie300372a

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SN - 0888-5885

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JO - Industrial and Engineering Chemistry Research

JF - Industrial and Engineering Chemistry Research

IS - 27

ER -

VLL equilibria and critical end points calculation of nitrogen-containing LNG systems: Application of SRK and PC-SAFT equations of state

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