The role of surface coarsening and sintering during thermal decomposition of titanium hydride

Roey Ben David, Yacov Finkelstein, Einat Nativ-Roth, Albert Danon, Dror Cohen, Eugen Rabkin

Research output: Contribution to journalArticlepeer-review

Abstract

Temperature programmed desorption - mass spectrometry was utilized to study the non-isothermal hydrogen desorption from as-received and pre-oxidized TiH 2 powder samples. Above the temperature of 750 °C, hydrogen desorption from the thermally decomposed as-received powder is kinetically delayed compared to that from the pre-oxidized samples. The scanning electron microscopy observations suggest that the delay stems from simultaneous surface coarsening and particles sintering that occur predominantly in the as-received powder at lower temperatures. It is also suggested that the difference in morphology evolution of the as-received and pre-oxidized powders originates from the dependence of Ti diffusion on the concentration of oxygen dissolved in Ti, since the oxide layer itself was found to dissociate at lower temperatures (∼500 °C).

Original languageAmerican English
Pages (from-to)6045-6054
Number of pages10
JournalInternational Journal of Hydrogen Energy
Volume44
Issue number12
DOIs
StatePublished - 1 Mar 2019

Keywords

  • Dehydrogenation
  • SEM
  • Sintering
  • Surface coarsening
  • Temperature programmed desorption – mass spectrometry (TPD-MS)
  • Titanium hydride
  • Temperature programmed desorption mass spectrometry (TPD-MS)

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

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