Abstract
Stoichiometric TiH2 nano-crystalline powder with particle mean size of less than 30 nm was synthesized for the first time via the Guen-Miller Flow-Levitation method. Details of the method are explained, and characterization of the synthesized TiH2 nanopowder is performed using high-resolution transmission electron microscopy, electron and X-ray diffraction analyses and X-ray photoelectron spectroscopy. Particle structure analysis confirms the capability and versatility of the Guen-Miller method to synthesize high-grade nano-scaled stoichiometric titanium hydride powder.Hydrogen recovery analyses are conducted and compared to hydrogen recovery from commercial-grade titanium hydride powder. Thermal and mass-spectrometry analyses on the synthesized nanopowder shows that hydrogen recovery starts at 390 °C and peaks at 460 °C, which lowers the energy demand during the process. These temperatures and the energy demand are substantially lower than the required in hydrogen recovery from conventional micro-sized commercial-grade titanium hydride. The results confirm that stoichiometric nano-scaled titanium hydride powder synthesized via the Guen-Miller Flow Levitation method possesses desirable characteristics for hydrogen storage and recovery.
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