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Thermogravimetric study of the kinetics of lithium titanate reduction by hydrogen
Affiliation:1. Fusion Reactor Materials Section, Bhabha Atomic Research Centre Mumbai 400085, India;2. Metallic Fuel Division, Bhabha Atomic Research Centre, Mumbai 400085, India;1. ITER Organization, Route de Vinon sur Verdon, 13115 Saint Paul-lez-Durance, France;2. D.V. Efremov Scientific Research Institute, 196641 St. Petersburg, Russia;1. Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PSN-RES/SCA/LPMA, Saclay, Gif-sur-Yvette 91192, France;2. CEA, IRFM, F-13108 Saint-Paul-lez-Durance, France;1. Plasma Physics Laboratory, University of Saskatchewan, Saskatoon, SK, Canada;2. Research Institute for Applied Mechanics, Kyushu University, Kasuga, Fukuoka, Japan;3. Institute of Plasma Physics, NSC KIPT, Kharkov, Ukraine;4. Plasmionique Inc., Varennes, Quebec, Canada;1. GREEnMat/LCIS, Department of Chemistry, B6a, University of Liège, Sart-Tilman, 4000 Liège, Belgium;2. APTIS, Department of Physics, B5a, University of Liège, Sart-Tilman, 4000 Liège, Belgium;3. Chemical Engineering Laboratory, Department of Applied Chemistry, B6a, University of Liège, Sart-Tilman, 4000 Liège, Belgium
Abstract:The lithium titanate powder was synthesized by gel-combustion route. The mechanism and the kinetics of hydrogen interaction with lithium titanate powder were studied using non-isothermal thermogravimetric technique. Lithium titanate underwent reduction in hydrogen atmosphere which led to the formation of oxygen deficient non-stoichiometric compound in lithium titanate. One-dimensional diffusion appeared to be the most probable reaction mechanism. The activation energy for reduction of lithium titanate under hydrogen atmosphere was found to be 27.4 kJ/mol/K. Structural changes after hydrogen reduction in lithium titanate were observed in X-ray diffraction analysis.
Keywords:Lithium titanate  Hydrogen reduction  Kinetics  Activation energy
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