Modeling phase equilibrium of hydrogen and natural gas in brines: Application to storage in salt caverns

In this work, the e-PPC-SAFT equation of state has been parameterized to predict phase equilibrium system H2 + CH4 H2O Na+Cl? in conditions temperature, pressure and salinities interest for gas storage salt caverns. The ions parameters have adjusted match salted water properties such as mean ionic coefficient activities, vapor pressures molar densities. Furthermore, binary interaction between hydrogen, methane, water, Na+ Cl? solubility data through Henry constant data. validity ranges model are 0–200 °C temperatures, 0–300 bar pressures, 0 8 molNaCl/kgH2O salinities. then used performance a pure hydrogen mixture methane compared. simulations cycles show that integrating up 20% caverns does not major influence on content compared storage. They also allowed estimate thermodynamic during operations, like gaseous phase. developed constitutes thus an interesting tool help size surface installations operate