Local Pressure of Supercritical Adsorbed Hydrogen in Nanopores

Materials

Roy Roukos¹  Sara Abou Dargham¹  Jimmy Romanos¹  Peter Pfeifer² 

[1] Department of Natural Sciences, Lebanese American University, P.O. Box 36, Byblos, Lebanon;Department of Physics, University of Missouri, Columbia, MO 65201, USA;

关键词: hydrogen storage;    ono-kondo;    activated carbon;    adsorption;    nanopores;   

DOI  :  10.3390/ma11112235

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown