Estimation of system-level hydrogen storage for metal-organic frameworks with high volumetric storage density |
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| Affiliation: | 1. Ford Motor Company, Research and Advanced Engineering, 1201 Village Rd, Dearborn, MI 48121, USA;2. Savannah River National Laboratory, Aiken, SC 29808, USA;3. Mechanical Engineering Department, University of Michigan, Ann Arbor, MI 48109, USA;4. Department of Chemistry, University of Michigan, Ann Arbor, MI 48109, USA;1. Savannah River National Laboratory, Aiken, SC 29808, USA;2. Greenway Energy, Aiken, SC, 29803, USA;1. Optimal CAE Inc., Plymouth, MI 48170, USA;2. Savannah River National Laboratory, Aiken, SC 29808, USA;3. Chemical and Materials Systems Laboratory, General Motors R&D Technical Center, Warren, MI 48090, USA;4. Entegris Inc – Specialty Gas Solution, Franklin, MA 02038, USA;1. Hydrogen Research Institute, Université du Québec à Trois-Rivières, Trois-Rivières G9A 5H7, Canada;2. Gas Processing Center, College of Engineering, Qatar University, Doha, Qatar;1. North China Institute of Aerospace Engineering, Langfang, 065000, China;2. College of Chemical New Materials Engineering, Shandong Polytechnic College, Jining, 272067, China;3. Institute of Theoretical Physics Shanxi University, Taiyuan, Shanxi, 030006, China;4. Department of Physics, University of Science and Technology Beijing, Beijing, 100083, China |
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| Abstract: | Metal organic framework (MOF) materials have emerged as the adsorbent materials with the highest H2 storage densities on both a volumetric and gravimetric basis. While measurements of hydrogen storage at the material level (primarily at 77 K) have been published for hundreds of MOFs, estimates of the system-level hydrogen storage capacity are not readily available. In this study, hydrogen storage capacities are estimated at the system-level for MOFs with the highest demonstrated volumetric and gravimetric H2 storage densities. System estimates are based on a single tank cryo-adsorbent system that utilizes a type-1 tank, multi-layer vacuum insulation, liquid N2 cooling channels, in-tank heat exchanger, and a packed MOF powder inside the tank. It is found that with this powder-based system configuration, MOFs with ultra-high gravimetric surface areas and hydrogen adsorption amounts do not necessarily provide correspondingly high volumetric or gravimetric storage capacities at the system-level. Meanwhile, attributes such as powder packing efficiency and system cool-down temperature are shown to have a large impact on the system capacity. These results should shed light on the material properties that must to be optimized, as well as highlight the important design challenges for cryo-adsorbent hydrogen storage systems. |
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| Keywords: | hydrogen storage Metal-organic-framework Cryo-adsorption Adsorbent |
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