Experimental Dataset on the Absorption-Desorption Dynamics of an AB2 Metal Hydride Hydrogen Storage Tank for a 300 Watt PEM Fuel Cell

Published: 24 September 2026| Version 1 | DOI: 10.17632/8km9z62tct.1
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Description

This dataset presents experimental data from testing a prototype AB2-type metal hydride hydrogen storage tank sized to supply a 300 W fuel cell for 6 hours (4.5 kWh, equivalent to 135 g H2). The tank uses an AB2 alloy (Ti0.815Zr0.185Cr0.77Fe0.07Mn0.88, Eco-G New Energy Co., Ltd., theoretical capacity ~1.76 wt%) housed in a cylindrical 316L stainless steel vessel (3.5-inch schedule 80, 8.08 mm wall, 321 mm length, 2,532 cm3 internal volume, ASME BPVC Section VIII), holding 7.8 kg of hydride. Performance was evaluated by the flow-through method using a BiosFlow FDC-320 Mass Flow Controller (1-30 SLPM) to set/record hydrogen flow, a Dwyer 628 piezoresistive pressure transmitter (0-3,000 psi), and five Type-K Tempsense thermocouples (TC1-TC5, -200 to 1,250 °C) mounted along the tank shell to profile temperature. Signals were logged by an embedded 32-bit dual-core microcontroller system (thermocouple-to-digital module, 16-bit ADC, Modbus RS-485 to the MFC) into CSV/Excel files at ~1-second intervals. Before testing, the hydride was activated through 2-4 heating-under-vacuum cycles (Ulvac GHD 101-A pump) to reduce surface oxide. The dataset comprises three Excel files (5_SLPM.xlsx, 10_SLPM.xlsx, 15_SLPM.xlsx) for three charging (absorption) flow rates, while discharging (desorption) was standardized at ~5 SLPM in all three for comparability. Each file logs time, flow rate, pressure, TC1-TC5 temperature, incremental/cumulative volume, and total H2 absorbed/desorbed (SL, mol, g, wt% of the 7.8 kg hydride). The tank absorbed 78.03, 92.69, and 91.29 g H2 at 5, 10, and 15 SLPM, and released 65.22, 61.06, and 65.77 g at the standardized discharge rate. Absorption raised temperature up to 75 °C (peak consistently at TC3); desorption lowered it to -18 °C (minimum mainly at TC1), reflecting strong exothermic-endothermic effects and heat-transfer limits that kept actual capacity (~1.00-1.19 wt%) below the material's theoretical 1.76 wt%.

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Categories

Metal Hydride, Hydrogen, Hydrogen Storage

Funders

  • Directorate of Research and Community Service, Directorate General of Research and Development, Ministry of Higher Education, Science, and Technology of the Republic of Indonesia, through the 2026 State University Operational Assistance (BOPTN)
    Grant ID: Master Contract No. 171/C3/DT.05.00/PL-BARU/2026, dated 13 April 2026; Researcher Contract No. 2211/PKS/ITS/2026, dated 5 May 2026

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