ZB 10 - Soft Condensed Matter (R. Holyst)

Hydrogen storage in nanoporous carbon materials: myth and facts

Author(s): Kowalczyk, Piotr and Holyst, Robert and Terrones, Mauricio and Terrones, Humberto
Title: Hydrogen storage in nanoporous carbon materials: myth and facts
Abstract: We used Grand canonical Monte Carlo simulation to model the hydrogen in the primitive, gyroid, diamond, and quasi-periodic nanoporous carbon materials and in carbon nanotubes. We that none of the investigated nanoporous carbon materials satisfy US Department of Energy goal of volumetric density and mass storage automotive application (6 wt\% and 45 kg H-2 m(-3)) at considered condition. Our calculations indicate that quasi-periodic nanoporous carbon material can reach the 6 wt\% at 3.8 MPa 77 K, but the volumetric density does not exceed 24 kg H-2 m(-3). bundle of single-walled carbon nanotubes can store only up to 4.5 but with high volumetric density of 42 kg H-2 m(-3). All nanoporous carbon materials are not effective against above 20 MPa at 77 K because the adsorbed density approaches density of the bulk fluid. It follows from this work that geometry carbon surfaces can enhance the storage capacity only to a limited Only a combination of the most effective structure with additives (metals) can provide an efficient storage medium for hydrogen in the quest for a source of clean''} energy.
Pages: 1786-1792
Journal: PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume: 9
ID: ISI:000245472600004
Year: 2007
DOI: 10.1039/b618747a