Local pressure of supercritical adsorbed hydrogen in nanopores

Romanos, Jimmy; Abou Dargham, Sara; Roukos, Roy; Pfeifer, Peter

Local pressure of supercritical adsorbed hydrogen in nanopores

Romanos, Jimmy; Abou Dargham, Sara; Roukos, Roy; Pfeifer, Peter

URI: http://hdl.handle.net/10725/11407

URL: https://www.mdpi.com/1996-1944/11/11/2235

DOI: https://doi.org/10.3390/ma11112235

Date: 2019-10-10

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Abstract:

An overview is given of the development of sorbent materials for hydrogen storage. Understanding the surface properties of the adsorbed film is crucial to optimize hydrogen storage capacities. In this work, the lattice gas model (Ono-Kondo) is used to determine the properties of the adsorbed hydrogen film from a single supercritical hydrogen isotherm at 77 K. In addition, this method does not require a conversion between gravimetric excess adsorption and absolute adsorption. The overall average binding energy of hydrogen is 4.4 kJ/mol and the binding energy at low coverage is 9.2 kJ/mol. The hydrogen film density at saturation is 0.10 g/mL corresponding to a local pressure of 1500 bar in the adsorbed phase

Citation:

Romanos, J., Abou Dargham, S., Roukos, R., & Pfeifer, P. (2018). Local Pressure of Supercritical Adsorbed Hydrogen in Nanopores. Materials, 11(11), 2235.