Related Experiment Video
Updated: Feb 2, 2026

Supercritical Nitrogen Processing for the Purification of Reactive Porous Materials
Published on: May 15, 2015
Local Pressure of Supercritical Adsorbed Hydrogen in Nanopores
Jimmy Romanos1, Sara Abou Dargham2, Roy Roukos3
1Department of Natural Sciences, Lebanese American University, P.O. Box 36, Byblos, Lebanon. jimmy.romanos@lau.edu.lb.
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.
Related Concept Videos
Hydrogen Bonds
Hydrogen Bonds Control the World!
Because hydrogen has very weak electronegativity when it binds with a strongly electronegative atom, such as oxygen or nitrogen, electrons in the bond are unequally shared....
Hydrogen Bonds
Supercritical Fluid Chromatography
SFC utilizes a supercritical fluid mobile phase,...
Vapor Pressure
Drugs Affecting GI Tract Motility: Adsorbents as Antidiarrheal Agents
Adsorbents...
Definition and Measurement of Pressure: Atmospheric Pressure, Barometer, and Manometer

