Comparing the practical hydrogen storage capacity of porous adsorbents: Activated carbon and metal-organic framework

Hyunlim Kim, Soon Hyeong So, Raeesh Muhammad, Hyunchul Oh*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

For the transition to a society powered by hydrogen energy, it is important to ensure the safe delivery of enough hydrogen. One promising method for storing and transporting hydrogen is sorbent-based cryo-adsorption. To assess the effectiveness of this physisorption-based method, hydrogen storage performance can be evaluated in various ways, including (gravimetric and volumetric) excess, absolute, total uptake, and useable capacity. However, previous literature mostly reported one or two of these indicators sporadically, which made it challenging to analyze the practical and comprehensive hydrogen storage capacity. Herein, we evaluate the most practical activated porous carbons and Metal-organic framework (MOF) as hydrogen storage materials using all relevant indicators. Specifically, the optimized useable capacity is defined as the H2 amount per the mass of adsorbent that can be released from the maximum tank pressure to the back pressure at optimized working temperature. This is considered the most practical measure of a tank system's capabilities. Thus, the maximum useable capacity can be determined based on temperature, so it is important to identify the ideal temperature conditions. It is noteworthy that our result revealed opposing the previous stereotypes which claimed that practical hydrogen storage is favored by lower temperatures.

Original languageEnglish
Pages (from-to)1616-1625
Number of pages10
JournalInternational Journal of Hydrogen Energy
Volume50
DOIs
Publication statusPublished - 2 Jan 2024
Externally publishedYes

Keywords

  • Absolute uptake
  • Excess uptake
  • Hydrogen storage
  • Porous material
  • Total uptake
  • Useable capacity

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