Hydrogen storage is one of the most important industrial applications of titanium hydride (TiH 2 ). A critical issue is the hydrogen release rate that strongly depends on the surface structure of TiH 2 particles. This work reports the results of an experimental campaign carried out on TiH 2 powders submitted to heat treatments in air at different temperatures and treatment times. After each heat treatment the TiH 2 powders were examined by X-ray diffraction (XRD) and the results evidenced that the surface layer consists of TiO 2 and Ti 2 O. Titanium oxide formation has been monitored by XRD at high temperature. Hydrogen release during heating of oxidized powders was investigated through temperature programmed desorption (TPD). Residual hydrogen in TiH 2 depends on the specific treatment: higher temperature and soaking time of the treatment, lower its content.
Gambini, M., Montanari, R., Richetta, M., Stilo, T., Varone, A., Vellini, M. (2018). Hydrogen release from oxidized titanium hydride. In R. Shabadi, M. Ionescu, M. Jeandin, C. Richard, T. Chandra (a cura di), Materials science forum. Vol. 941 (pp. 2203-2208). Trans Tech Publications [10.4028/www.scientific.net/MSF.941.2203].
Hydrogen release from oxidized titanium hydride
Gambini M.;Montanari R.;Richetta M.;Stilo T.;Varone A.;Vellini M.
2018-12-01
Abstract
Hydrogen storage is one of the most important industrial applications of titanium hydride (TiH 2 ). A critical issue is the hydrogen release rate that strongly depends on the surface structure of TiH 2 particles. This work reports the results of an experimental campaign carried out on TiH 2 powders submitted to heat treatments in air at different temperatures and treatment times. After each heat treatment the TiH 2 powders were examined by X-ray diffraction (XRD) and the results evidenced that the surface layer consists of TiO 2 and Ti 2 O. Titanium oxide formation has been monitored by XRD at high temperature. Hydrogen release during heating of oxidized powders was investigated through temperature programmed desorption (TPD). Residual hydrogen in TiH 2 depends on the specific treatment: higher temperature and soaking time of the treatment, lower its content.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
