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Open AccessArticle

Local Pressure of Supercritical Adsorbed Hydrogen in Nanopores

1
Department of Natural Sciences, Lebanese American University, P.O. Box 36, Byblos, Lebanon
2
Department of Physics, University of Missouri, Columbia, MO 65201, USA
*
Author to whom correspondence should be addressed.
Materials 2018, 11(11), 2235; https://doi.org/10.3390/ma11112235
Received: 16 October 2018 / Revised: 28 October 2018 / Accepted: 8 November 2018 / Published: 10 November 2018
(This article belongs to the Section Energy Materials)
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. View Full-Text
Keywords: hydrogen storage; ono-kondo; activated carbon; adsorption; nanopores hydrogen storage; ono-kondo; activated carbon; adsorption; nanopores
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MDPI and ACS Style

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

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