RT Journal Article
T1 An Examination of the Ternary Methane + Carbon Dioxide + Water Phase Diagram using the SAFT-VR Approach
A1 Míguez Díaz, José Manuel
A1 dos Ramos, María Carolina
A1 Martínez Piñeiro, Manuel
A1 Jiménez Blas, Felipe
AB In this work, the molecular based Variable Range Statistical Associating Fluid Theory (SAFT-VR) has been used to estimate the global phase equilibria diagram of the ternary mixture water + carbon dioxide + methane, over a wide pressure and temperature range. An accurate determination of the phase equilibria of this mixture is relevant in Petrophysics, as, for instance, in enhanced natural gas recovery from low permeability reservoirs (the so-called tight gas reservoirs), or in geology, as it is the basic composition of many geological fluids. A previous study on the phase behavior of the binary mixtures involved is presented, using in a transferable manner the characteristic molecular parameters for the three molecules involved. The ternary mixture presents a very rich and complex phase behavior, with a wide region of the thermodynamic space of phases (at higher pressures) presenting a large gap of ternary liquid!liquid equilibria, that upon descending pressures leads to the transition to a three-phase liquid!liquid!vapor equilibria region, and both regions are separated by a continuous critical end point line. The ability of the theory to describe this complex multicomponent mixture phase transition with a reduced and physically sound set of characteristic parameters must be underlined.
PB American Chemical Society
SN 1520-6106
SN 1520-5207 (electrónico)
YR 2011
FD 2011
LK http://hdl.handle.net/10272/17833
UL http://hdl.handle.net/10272/17833
LA eng
NO Míguez, J. M., dos Ramos, C., Piñeiro, y Blas, F. J.: "An Examination of the Ternary Methane + Carbon Dioxide + Water Phase Diagram using the SAFT-VR Approach", Journal of Physical Chemistry B, 115, 9604-9617 (2011). DOI: 10.1021/jp2017488
NO J.M.M. and M.M.P. acknowledge Consellería de Educación e Ordenación Universitaria (Xunta de Galicia) and Ministerio de Ciencia e Innovación (Project Ref FIS2009-07923 and FPUGrant Ref AP2007-02172), in Spain, for financial support. F.J.B. also acknowledges financial support from Ministerio de Ciencia e Innovaciónon (Project Ref FIS2010-14866). Additional supportfrom Universidad de Huelva and Junta de Andalucía is also acknowledged.J.M.M. and M.M.P. acknowledge Consellería de Educación e Ordenación Universitaria (Xunta de Galicia) and Ministerio de Ciencia e Innovación (Project Ref FIS2009-07923 and FPU Grant Ref AP2007-02172), in Spain, for financial support. F.J.B. also acknowledges financial support from Ministerio de Ciencia e Innovación (Project Ref FIS2010-14866). Additional support from Universidad de Huelva and Junta de Andalucía is also acknowledged.
DS Repositorio Institucional de la Universidad de Huelva
RD 30 may 2026