Estimation of system-level hydrogen storage for metal-organic frameworks with high volumetric storage density. (7th June 2019)

• Record Type: Journal Article
• Authors: Purewal, Justin; Veenstra, Mike; Tamburello, David; Ahmed, Alauddin; Matzger, Adam J.; Wong-Foy, Antek G.; Seth, Saona; Liu, Yiyang; Siegel, Donald J.
• Is Part Of: International journal of hydrogen energy. Volume 44:Number 29(2019)
• Page Start: 15135
• Page End: 15145
• Publication Date: 2019-06-07
• Subjects: hydrogen storage -- Metal-organic-framework -- Cryo-adsorption -- Adsorbent; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2019.04.082
• Languages: English
• ISSNs: 0360-3199

Abstract

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. Graphical abstract: Image 1 Highlights: Hydrogen storage capacities of MOFs were studied at material and system level. MOFs studied include MOF-5, IRMOF-20, SNU-70, UMCM-9, DUT-23 (Co) and NU-100. Excess 77 K hydrogen adsorption decreases with uniaxial compaction of MOFs. Powder packing efficiency of MOFs has a large effect on the system capacity. The results highlight the material and system attributes which must be optimized.