Suárez García, Fabián, Vilaplana-Ortego, Eduardo, Kunowsky, Mirko, Kimura, M., Oya, Asao, Linares-Solano, Angel
Activation of polymer blend carbon nanofibres by alkaline hydroxides and their hydrogen storage performances
SUÁREZ-GARCÍA, F., et al. "Activation of polymer blend carbon nanofibres by alkaline hydroxides and their hydrogen storage performances". International Journal of Hydrogen Energy. Vol. 34, Issue 22 (Nov. 2009). ISSN 0360-3199, pp. 9141-9150
URI: http://hdl.handle.net/10045/20444
DOI: 10.1016/j.ijhydene.2009.09.026
ISSN: 0360-3199 (Print)
Abstract: 
In the present work we study the hydroxide activation (NaOH and KOH) of phenol-formaldehyde resin derived CNFs prepared by a polymer blend technique to prepare highly porous activated carbon nanofibres (ACNFs). Morphology and textural characteristics of these ACNFs were studied and their hydrogen storage capacities at 77 K (at 0.1 MPa and at high pressures up to 4 MPa) were assessed, and compared, with reported capacities of other porous carbon materials. Phenol-formaldehyde resin derived carbon fibres were successfully activated with these two alkaline hydroxides rendering highly microporous ACNFs with reasonable good activation process yields up to 47 wt.% compared to 7 wt.% yields from steam activation for similar surface areas of 1500 m2/g or higher. These nano-sized activated carbons present interesting H2 storage capacities at 77 K which are comparable, or even higher, to other high quality microporous carbon materials. This observation is due, in part, to their nano-sized diameters allowing to enhance their packing densities to 0.71 g/cm3 and hence their resulting hydrogen storage capacities.
Keywords:Carbon nanofibres, Chemical activation, Hydrogen storage, Packing density
Elsevier
info:eu-repo/semantics/article