Modeling Subsurface Hydrogen Storage With Transport Properties From Entropy Scaling Using the PC‐SAFT Equation of State

Hydrogen is a promising alternative to carbon based energy carriers and may be stored in large quantities subsurface storage deposits. This work assesses the impact of static (density phase equilibria) dynamic (viscosity diffusion coefficients) properties on pressure field during injection extraction hydrogen porous subsurface. In first step, we derive transport for water, their mixture using Perturbed-Chain Statistical Associating Fluid Theory equation state combination with an entropy scaling approach compare model predictions models from literature. Our compares excellently experimental coefficients literature higher number adjustable parameters, such as GERG2008, shows clear improvement over empirical correlations hydrogen. second determine effect further reduction by comparing our against much simpler applying For this purpose, periodically injected into extracted out dome-shaped aquifer under caprock. results show that density viscosity have highest field, thermodynamic like new presented here essential modeling aquifer, while keeping at minimum. diffusion-dominated settings through caprock, developed improved dependence temperature pressure, leading more accurate approximation diffusive fluxes.