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Thermodynamic and kinetic study of the thermal dehydrogenation of Sr(AlH4)2 taking into account the by-products NaCl and LiCl

Habermann, Franziska ; Burkmann, Konrad ; Kraus, Jakob ; Störr, Bianca ; Seidel, Jürgen ; Kortus, Jens ; Gumeniuk, Roman ; Bohmhammel, Klaus ; Mertens, Florian

Journal of alloys and compounds, 2024-04, Vol.980, p.173476, Article 173476 [Periódico revisado por pares]

Elsevier B.V

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  • Título:
    Thermodynamic and kinetic study of the thermal dehydrogenation of Sr(AlH4)2 taking into account the by-products NaCl and LiCl
  • Autor: Habermann, Franziska ; Burkmann, Konrad ; Kraus, Jakob ; Störr, Bianca ; Seidel, Jürgen ; Kortus, Jens ; Gumeniuk, Roman ; Bohmhammel, Klaus ; Mertens, Florian
  • Assuntos: Enthalpy ; Entropy ; Heat capacity ; Metal hydrides ; Thermal analysis
  • É parte de: Journal of alloys and compounds, 2024-04, Vol.980, p.173476, Article 173476
  • Descrição: The presented work sets out to investigate the influence of LiCl and NaCl, the typical by-products of the mechanochemical synthesis of complex metal hydrides such as alanates and boranates, on the kinetics and thermodynamics of the dehydrogenation of Sr(AlH4)2. We found no effect of NaCl on the decomposition pathway of Sr(AlH4)2. Although LiCl does not affect the first dehydrogenation to SrAlH5, it does alter the further decomposition to the final products. Thermodynamic properties such as the heat capacity functions, enthalpies of formation and absolute entropies were determined for Sr(AlH4)2 itself and its decomposition product SrAlH5 within this study. [Display omitted] •Influence of synthesis by-products on the decomposition of Sr(AlH4)2 detected.•None of the decomposition steps of Sr(AlH4)2 are affected by NaCl.•LiCl changes the decomposition steps from SrAlH5 onward.•Determination of thermodynamic data (ΔFH, S and Cp(T)) of Sr(AlH4)2 and SrAlH5.
  • Editor: Elsevier B.V
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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