Development of hydrogen storage reactor using composite of metal hydride materials with ENG |
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| Affiliation: | 1. Hydrogen Research Department, Future Energy Research Division, Korea Institute of Energy Research, 152 Gajeong-ro, Yuseong-gu, Daejeon 34129, Republic of Korea;2. P&P Energytech Co., 1486 Daeduk-daero, Yuseong-gu, Daejeon 34323, Republic of Korea;3. Nanointech Co., 56 Palpo-gil, Wonju-si, Gangwon-do 26356, Republic of Korea;4. Department of Chemical and Biological Engineering, Korea National University of Transportation, 50 Daehak-ro, Chungju-si, Chungcheongbuk-do 27469, Republic of Korea;1. Joint Institute for High Temperatures of the Russian Academy of Sciences, Moscow, Russia;1. Key Laboratory of Thermo-Fluid Science and Engineering of Ministry of Education, School of Energy and Power Engineering, Xi''an Jiaotong University, Shaanxi, 710049, PR China;2. School of Chemical Engineering and Technology, Xi''an Jiaotong University, Shaanxi, 710049, PR China;1. Ashikaga University, 268-1 Omae-cho, Ashikaga-Shi, Tochigi, 326-8558, Japan;2. NASU DENKI TEKKO Co., Ltd, 1085-5 Yoshihashi, Yachiyo-Shi, Chiba, 276-0047, Japan;1. St. Joseph Engineering College, Vamanjoor, Mangaluru 575028, Karnataka, India;2. Institute for Plasma Research, Gandhinagar 382428, Gujarat, India;1. Hubei Key Laboratory of Advanced Technology for Automotive Components, Hubei Collaborative Innovation Center for Automotive Components Technology, School of Automotive Engineering, Wuhan University of Technology, Hubei 430070, China;2. Hydrogen Research Institute, Université du Québec à Trois-Rivières, QC G9A 5H7, Canada |
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| Abstract: | Hydrogen is widely accepted as a promising energy carrier replacing fossil fuels. In this context hydrogen storage is one of the critical challenges in realizing hydrogen economy which relies on hydrogen as the commercial fuel. Due to very low volumetric energy density of pure hydrogen, it is highly compressed as a gas phase or liquified at extremely low temperature. However, chemically combined state in other materials has advantages in terms of storage conditions and associated safety concerns.The present study focuses on a development of a hydrogen storage applicable to special fuel cell (FC) mobilities such as forklift but not limited to. We adopts a solid-state storage method using metal hydride composite prepared by processing La0.9Ce0.1Ni5 and extended natural graphite (ENG). The isothermal hydrogen absorption/desorption behavior of the composite is measured at 20–80 °C. The results suggest that around 10 bar is sufficient to store 1.2 wt% of hydrogen. A cylindrical reactor is manufactured and experiments are carried out with the fabricated hydrogen storage material by changing operation conditions. The results of satisfaction are obtained in terms of the amount of hydrogen storage (>83 standard liter) and the absorption time (~10 min) under relatively moderate conditions of temperature (~19 °C) and pressure (~11 bar).As for scaling-up, a reactor of 2.0 kWh is designed based on the experimental results. CFD analysis is performed based on the hottest operation conditions focusing on a cooling water flow. The flow pattern and the temperature distribution of the cooling water are expected to be adequate not deviating from the stable operating conditions. CFD would be further applied to optimize the incorporated modular reactors. |
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| Keywords: | Hydrogen storage Metal hydride composite PCT Reactor development Operating conditions |
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