FN Archimer Export Format
PT J
TI Phase Equilibria of the CH4-CO2 Binary and the CH4-CO2-H2O Ternary Mixtures in the Presence of a CO2-Rich Liquid Phase
BT 
AF LEGOIX, Ludovic
   RUFFINE, Livio
   DONVAL, Jean-Pierre
   HAECKEL, Matthias
AS 1:1,2;2:2;3:2;4:1;
FF 1:PDG-REM-GM-LCG;2:PDG-REM-GM-LCG;3:PDG-REM-GM-LCG;4:;
C1 Helmholtz Ctr Ocean Res Kiel, GEOMAR, Wischhofstr 1-3, D-24148 Kiel, Germany.
   IFREMER, Ctr Bretagne, Dept Ressources Phys & Ecosyst Fond Mer, Unite Geosci Marines, BP70, F-29280 Plouzane, France.
C2 IFM GEOMAR, GERMANY
   IFREMER, FRANCE
SI BREST
SE PDG-REM-GM-LCG
IN WOS Ifremer jusqu'en 2018
   DOAJ
   copubli-europe
IF 2.676
TC 15
UR https://archimer.ifremer.fr/doc/00414/52538/53349.pdf
LA English
DT Article
DE ;gas hydrate;CH4;CO2-rich mixtures;phase equilibria;Soave-Redlich-Kwong (SRK) cubic equation of state (EoS)
AB The knowledge of the phase behavior of carbon dioxide (CO2)-rich mixtures is a key factor to understand the chemistry and migration of natural volcanic CO2 seeps in the marine environment, as well as to develop engineering processes for CO2 sequestration coupled to methane (CH4) production from gas hydrate deposits. In both cases, it is important to gain insights into the interactions of the CO2-rich phase—liquid or gas—with the aqueous medium (H2O) in the pore space below the seafloor or in the ocean. Thus, the CH4-CO2 binary and CH4-CO2-H2O ternary mixtures were investigated at relevant pressure and temperature conditions. The solubility of CH4 in liquid CO2 (vapor-liquid equilibrium) was determined in laboratory experiments and then modelled with the Soave–Redlich–Kwong equation of state (EoS) consisting of an optimized binary interaction parameter kij(CH4-CO2) = 1.32 × 10−3 × T − 0.251 describing the non-ideality of the mixture. The hydrate-liquid-liquid equilibrium (HLLE) was measured in addition to the composition of the CO2-rich fluid phase in the presence of H2O. In contrast to the behavior in the presence of vapor, gas hydrates become more stable when increasing the CH4 content, and the relative proportion of CH4 to CO2 decreases in the CO2-rich phase after gas hydrate formation. 
PY 2017
PD DEC
SO Energies
SN 1996-1073
PU Mdpi Ag
VL 10
IS 12
UT 000423156900105
DI 10.3390/en10122034
ID 52538
ER

EF