There are two model used currently by many researchers to monitor H2 diffusion in depleted gas and saline aquifer:
1. Sigmund
2. Wilke-Chang.
Although literature suggest that Wilke-Chang is most suitable for oil phase molecular diffusion and SIgmund for oil and gas phase.
In your experience which would be a better choice to use for Hydrogen storage in saline aquifer
For hydrogen storage in saline aquifers, the Sigmund model would likely be a better choice. The Sigmund model is typically used for both oil and gas phases, which aligns more with the conditions in a saline aquifer, where hydrogen is likely to interact with both water and gas phases. The Wilke-Chang model, on the other hand, is more suited for oil-phase molecular diffusion and may not capture the complexities of gas-phase diffusion in the aquifer as effectively.
Given the importance of accurately modeling gas-phase diffusion in a saline aquifer for hydrogen storage, Sigmund would be more appropriate in this context.
Greetings
The choice of the diffusion model depends on the application and hydrogen storage conditions. Models based on diffusion in solids, such as Fick's Law, are often used to analyze hydrogen movement within metallic materials or hydrides.
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