6533b872fe1ef96bd12d3a6c
RESEARCH PRODUCT
Effects of Gamma Irradiation on the Kinetics of the Adsorption and Desorption of Hydrogen in Carbon Microfibres
Antonio MadroñeroCesar MotaMario CulebrasAndrés CantareroJ. M. AmoJ. I. RoblaClara M. Gómezsubject
Raman SpectroscopyElectrical ResistivityMaterials scienceHydrogenHydrogen AdsorptionGeneral Engineeringchemistry.chemical_elementGrain sizeSurface energyGamma IrradiationHydrogen storageSessile drop techniqueAdsorptionchemistryChemical engineeringCarbon FiberDesorptionGrain boundarydescription
In this study, three types of carbon fibres were used, they were ex-polyacrylonitrile carbon fibres with high bulk modulus, ex-polyacrylonitrile fibres with high strength, and vapour grown carbon fibres. All the samples were subjected to a hydrogen adsorption process at room temperature in an over-pressured atmosphere of 25 bars. The adsorption process was monitored through electrical resistivity measurements. As conditioning of the fibres, a chemical activation by acid etching followed by ¿-ray irradiation with 60Co radioisotopes was performed. The surface energy was deter-mined by means of the sessile drop test. Both conditioning treatments are supplementary; the chemical activation works on the outer surface and the ¿-irradiation works in the bulk material as well. Apparently, the most significant parameter for hydrogen storage is the crystallite size. From this point of view, the most
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2013-01-01 | Advances in Materials Physics and Chemistry |