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Title: A Semi-Empirical Excess Pressure Equation for CO{sub 2}-H{sub 2}O fluids at 400 C, 0--400 MPa

Abstract

Highly accurate and precise density data for CO{sub 2}-H{sub 2}O mixtures at 400 C 10-400 MPa, were used to develop a modified, B-truncated virial equation for excess pressure (P{sup ex}). This function and empirical equations of state for H{sub 2}O and CO{sub 2} accurately represent the experimentally determined densities, and interpolate smoothly between data points. Integrating the P{sub ex} expression with respect to molar volume yields an equation for excess Helmholta free energy, which can be used to calculate other excess properties of interest. The P{sup ex} modeling method has important advantages over more conventional, alternative approaches.

Authors:
; ;
Publication Date:
Research Org.:
Oak Ridge National Lab., TN (US)
Sponsoring Org.:
USDOE Office of Science (US)
OSTI Identifier:
751601
Report Number(s):
ORNL/CP-105949
TRN: AH200037%%98
DOE Contract Number:  
AC05-96OR22464
Resource Type:
Conference
Resource Relation:
Conference: 13th International Conference on the Properties of Water and Steam, Toronto, Ontario (CA), 09/12/1999--09/16/1999; Other Information: PBD: 12 Sep 1999
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; CARBON DIOXIDE; EQUATIONS OF STATE; FREE ENERGY; MIXTURES; STEAM; VIRIAL EQUATION; WATER VAPOR; DENSITY; DENSITY MEASUREMENT

Citation Formats

Blencoe, J.G., Anovitz, L.M., and Singh, J. A Semi-Empirical Excess Pressure Equation for CO{sub 2}-H{sub 2}O fluids at 400 C, 0--400 MPa. United States: N. p., 1999. Web.
Blencoe, J.G., Anovitz, L.M., & Singh, J. A Semi-Empirical Excess Pressure Equation for CO{sub 2}-H{sub 2}O fluids at 400 C, 0--400 MPa. United States.
Blencoe, J.G., Anovitz, L.M., and Singh, J. Sun . "A Semi-Empirical Excess Pressure Equation for CO{sub 2}-H{sub 2}O fluids at 400 C, 0--400 MPa". United States. https://www.osti.gov/servlets/purl/751601.
@article{osti_751601,
title = {A Semi-Empirical Excess Pressure Equation for CO{sub 2}-H{sub 2}O fluids at 400 C, 0--400 MPa},
author = {Blencoe, J.G. and Anovitz, L.M. and Singh, J.},
abstractNote = {Highly accurate and precise density data for CO{sub 2}-H{sub 2}O mixtures at 400 C 10-400 MPa, were used to develop a modified, B-truncated virial equation for excess pressure (P{sup ex}). This function and empirical equations of state for H{sub 2}O and CO{sub 2} accurately represent the experimentally determined densities, and interpolate smoothly between data points. Integrating the P{sub ex} expression with respect to molar volume yields an equation for excess Helmholta free energy, which can be used to calculate other excess properties of interest. The P{sup ex} modeling method has important advantages over more conventional, alternative approaches.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {9}
}

Conference:
Other availability
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