Experimental Volumetric Hydrogen Uptake Determination at 77 K of Commercially Available Metal-Organic Framework Materials

Storage is still limiting the implementation of hydrogen as an energy carrier to integrate intermittent operation renewable sources. Among different solutions currently used compressed or liquified systems, physical adsorption at cryogenic temperature in porous materials attractive alternative due its fast and reversible resulting reduction storage pressure. The feasibility cryoadsorption for depends mainly on performance specific application, where metal-organic frameworks MOFs are remarkable candidates. In this work, gravimetric volumetric uptakes 77 K up 100 bar commercially available were measured since these made from relatively cheap accessible building blocks. These also show high properties near large-scale production. measuring device was calibrated room temperatures calculate average correction factor standard deviation so that included measurement error better comparability with measurements. influence conditions studied, concluding adsorbing area material occupied volume sample most critical factors a reproducible measurement, apart samples’ preparation before measurement. Finally, actual density powders calculated by directly their analysis cell, comparing value maximum uptake considering crystals. From selection commercial MOFs, HKUST-1, PCN-250(Fe), MOF-177, MOF-5 true potential fulfill requirement 40 g·L?1 basis systems without further packing powders.