Portal de Periódicos da CAPES

Metal hydride hydrogen storage for near-ambient temperature and atmospheric pressure applications, a PDSC study

1995; Elsevier BV; Volume: 20; Issue: 11 Linguagem: Inglês

10.1016/0360-3199(95)00025-9

1879-3487

Magnus Hagström,

Boron and Carbon Nanomaterials Research

Pressure differential scanning calorimetry (PDSC) has been used to study the applicability of six hydrogen absorbing pseudobinary AB5 and AB2 alloys for near ambient temperature (10–50 °C) and atmospheric pressure (1–10 … 20 bar) applications. Van't Hoff plots of the materials have been determined from thermal absorption and desorption peak positions at different pressures. The pressure and temperature ranges were 1–70 bar and 20–150 °C, respectively. A large hysteresis effect and sloping P-C-T plateaux are the most serious problems of MmNi4.5Mn0.45Zr0.05 and Zr0.7Ti0.3MnFe La1 −xNdxNi5(x = 0.05–0.1), LmNi(1) (JMC) and Hydralloy C15 (GfE) are all well-suited for the pressure and temperature ranges mentioned above. Zr(Fe0.75Cr0.25)2 suffers both from hysteresis and sloping P-C-T. plateaux, but it can be used as a hydrogen storage material between an electrolyzer and a fuel cell, especially if the temperature range can be slightly narrowed.