The United States Department of Energy has concluded that hydrogen storage is a cornerstone technology for implementing a hydrogen energy economy. However, significant scientific advancement is still required if a viable on-board storage technology is to be developed. For example, an adsorption process for on-board vehicular storage will require a hydrogen binding energy between ~20-60 kJ/mol to allow for near-room temperature operation at reasonable pressures. Typically, non-dissociative physisorption due purely to van der Waals forces involves a binding energy of only ~ 4 kJ/mol, whereas a chemical bond is ~ 400 kJ/mol. The desired binding energy range for vehicular hydrogen storage therefore dictates that molecular H2 be stabilized in an unusual manor.
Wednesday, August 10
Spellcheckers won't always work
This is directly quoted from the abstract to talk number 5929-12 from the SPIE Optics and Photonics Conference, San Diego 2005.