In recent times, hydrogen (as a fuel) has captured attention of the scientists, researchers, industries, governments and environmentalists. Meanwhile, the researchers in porous/fractured media have proposed temporary and permanent storage of hydrogen. The proponents of temporary or seasonal storage have proposed that since hydrogen consumption would be subject to demand and/or supply fluctuations, so it is proposed to storage them in porous/fractured subsurface geological media. Wettability has been identified as one of the key factor to achieve the hydrogen storage task.
The researchers on the platform are invited to contribute to this discussion as what wettability scenario is desirable for both temporary storage, and permanent storage (in which hydrogen acts like a battery fuel cell - see http://www.hydrogenbatteries.org/What_Is_A_Hydrogen_Battery.htm).
Faisal Ur Rahman Awan
I could argue with those scientists who argue that the hydrogen wettability of the pores is of great importance. It is better to talk about hydrogen adsorption rather than wettability. After all, hydrogen is not a liquid. Hydrogen adsorption will be in one or two layers, and then, possibly, capillary condensation of hydrogen molecules, but this is also not wettability. If they are stored in storage facilities where there was oil, then hydrogen will dissolve in the pores. It is completely forgotten that hydrogen with various elements forms hydrides. The reaction will be biased towards their formation, since hydrogen will be stored at high pressure (concentration).
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