Experimental Measurements of Vapor–Liquid Equilibria of the H₂O + CO₂ + CH₄ Ternary System

Abstract

Reported are the experimental measurements on vapor–liquid equilibria in the H2O + CO2 + CH4 ternary system at temperatures from (324 to 375) K and pressures from (10 to 50) MPa. The results indicate that the CH4 solubility in the ternary mixture is about 10 % to 40 % more than that calculated by interpolation from the Henry’s law constants of the binary system, H2O + CH4, and the solubility of CO2 is 6 % to 20 % more than what is calculated by the interpolation from the Henry’s law constants of the binary mixture, H2O + CO2.

Optimal process design for the polygeneration of SNG, power and heat by hydrothermal gasification of waste biomass: Thermo-economic process modelling and integration

“…4 that have recently been reported in the ternary data of Qin et al 37 With this correction, the ternary model reaches the precision of the binary model.…”

A Geochemical Model of Fluids and Mineral Interactions for Deep Hydrocarbon Reservoirs

“…The existing data are also not systematic. Qin et al [21] have studied phase equilibria for CO 2 -CH 4 -H 2 O system at 325 K and 376 K and with pressure from 100 bar to 500 bar. 21 data points were generated in the work.…”

Experimental and molecular modelling study of the three-phase behaviour of (propane+carbon dioxide+water) at reservoir conditions

“…Comparing to the findings of our previous work [4], the addition of decane presented a very mild effect, only visible at high pressure (close to the upper critical end points; i.e., pressures > 10 MPa). In Figure 13, we examine the solubility of carbon dioxide in the water phase of a different ternary system, this time (methane + carbon dioxide + water) [12], again compared to solubility data in the aqueous phase of the binary (carbon dioxide + water). As in the case of propane, the antisolvent effect of a light hydrocarbon, now methane, can be observed in this figure.…”

“…Among mixtures consisting of carbon dioxide with water and an alkane of low molecular weight, the system (methane + carbon dioxide + water) has been the most widely studied, not only regarding fluid-phase equilibria [12][13][14][15] but also fluid-hydrate equilibria [16][17][18][19]. Most of these fluid-phase equilibrium studies in ternary mixtures have focused on vapour-liquid equilibrium (VLE) and, with the exception of that of Qin et al [12], only one phase composition was measured. In the study of Song and Kobayashi [15] measurements were made along the three-phase equilibrium locus, but only the CO 2 -rich phase was analyzed.…”