Methods for accurate high-temperature Sieverts-type hydrogen measurements of metal hydrides

JOURNAL OF ALLOYS AND COMPOUNDS

卷:787

Article

Sheppard, Drew A.¹  Paskevicius, Mark¹  Javadian, Payam¹  Davies, Ian J.²  Buckley, Craig E.¹ 

[1] Curtin Univ, Fuels & Energy Technol Inst, Dept Phys, Hydrogen Storage Res Grp, GPOB U1987, Perth, WA 6845, Australia

[2] Curtin Univ, Sch Civil & Mech Engn, Perth, WA 6845, Australia

关键词: Sieverts apparatus;    Hydrogen permeability;    Hydrogen solubility;    Metal hydrides;    Thermodynamic properties;    Gas-solid reactions;   

DOI  :  10.1016/j.jallcom.2019.02.067

来源: Elsevier

【 摘 要 】

The potential of high-temperature metal hydrides (HTMHs) as thermal energy storage materials means that accurate assessment of their properties is required on the laboratory scale. Above similar or equal to 450 degrees C, the hydrogen permeability through sample cell reactors (SCRs) used in experiments to characterise HTMHs can have an appreciable impact on the data. In this work, the thermodynamic and kinetic properties of TiHx have been measured at temperatures up to 725 degrees C as a test of different practical methods for limiting the effects of hydrogen permeability and solubility in SCRs during high-temperature characterisation of metal hydrides. Aluminium-coated stainless steel and alpha-SiC were used to construct SCRs with reduced hydrogen permeability using commercially available techniques. When steel SCRs are the only practical option, guidelines have been developed to choose experimental conditions that minimise the effect on the data collected due to their hydrogen permeability and solubility. A method has also been developed to correct collected data for the hydrogen permeability and solubility of SCRs. (C) 2019 Published by Elsevier B.V.

【 授权许可】

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