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    An Experimental Study on Hydrogen Storage Capabilities Improvement of the TiFe-H-2
    (TAYLOR & FRANCIS INC, 2012) Halicioglu, R.; Bayrak, M.; Iscan, B.; Akbalik, F.
    This study aimed to increase the percentage of the storage capacity of TiFe alloys, which are used for hydrogen storage. The TiFe alloys are capable of very high pressure storage. In this study, for the purpose of activation of storage alloy in low pressures, the required parameters were applied one by one. After about 3-4 hours of grinding, it was observed that the storage capacity was increased by about five times. In the study for determining the iteration number, it was clarified that, by applying about 10 times charge-discharge process, the storage rate was increased by about 15 times. It was concluded by the experimental research that, with a maximum of 10% of the carbon addition, TiFe alloy purity was degraded and storage rate increased at a rate of 27%.
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    Effects of reactor design on TiFe-hydride's hydrogen storage
    (WILEY-BLACKWELL, 2013) Halicioglu, R.; Selamet, O. F.; Bayrak, M.
    The experimental investigation of TiFe-hydride has been performed for rapid and high-rate storage of hydrogen under low operating pressure. Three different reactors are designed, manufactured and tested to investigate the effect of reactor design. The reactors are a tubular-shaped simple one, a tubular-shaped reactor with fins and a tubular-shaped reactor with liquid cooling channels. All of the reactors are filled with same amount of TiFe alloy and charged under various hydrogen supply pressures. The charging time and the role of the heat transfer mechanism are investigated by obtaining temperature histories which are measured at several points on the reactors. It has been found that the reactor design and activation process of metal-hydride alloy are significant parameters on the amount of hydrogen stored in the reactor and the elapsed time for storing. The charging time was 84% less, and storage rate was 39% higher for Reactor-3 compared to Reactor-1. The hydrogen storage rate was approximately 0.44% which is achieved at relatively low charging pressure of 12bar. Copyright (c) 2012 John Wiley & Sons, Ltd.