Hydrogen storage adsorbent systems acceptability envelope
- Savannah River Site (SRS), Aiken, SC (United States). Savannah River National Lab. (SRNL)
- Savannah River Site (SRS), Aiken, SC (United States). Savannah River National Lab. (SRNL); Greenway Energy, Aiken, SC (United States)
A methodology was developed here to determine the range of coupled material parameters and operating conditions that allow an adsorbent based hydrogen storage system to meet performance targets. The range of acceptable parameters forms a multi-dimensional volume, or envelope. For this reason, the methodology is referred to as the Adsorbent Acceptability Envelope. The model evaluates the performance of the overall storage tank, comprised of the adsorbent material, the heat transfer system and the pressure vessel. Two cases were analyzed, both based on the flow-through cooling approach providing the cooling power required to charge hydrogen, with results presented and discussed. The first application (the forward problem) analyzed the gravimetric and volumetric performance of MOF-5® based hydrogen storage beds, under various operating conditions. Results demonstrated that the system can reach a gravimetric capacity of approximately 4 wt% and volumetric capacity of about 20 g/L within 200 s during the absorption process. The second application (the inverse problem) identified the range of selected material parameters, required to meet the U.S. Department of Energy targets for gravimetric and volumetric capacity. Results showed that the most important parameters are the maximum capacity and the density of the material. Adsorbents having a density on the order of twice that of nominal powder form MOF-5® can meet the 2020 DOE targets (i.e. system gravimetric capacity of 0.045 kgH2/kgSystem and system volumetric capacity of 0.030 kgH2/LSystem). A density of about 3–4.5 times the nominal value is required to meet the DOE 2025 targets (i.e. system gravimetric capacity of 0.055 kgH2/kgSystem and system volumetric capacity of 0.040 kgH2/LSystem). Likewise, a material with a maximum adsorption capacity approximately equal to three times that of nominal MOF-5® can meet the 2020 DOE targets, while a maximum capacity about 4.5 times the nominal value is required to meet the 2025 DOE targets.
- Research Organization:
- Savannah River Site (SRS), Aiken, SC (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE)
- Grant/Contract Number:
- AC09-08SR22470
- OSTI ID:
- 1482185
- Alternate ID(s):
- OSTI ID: 1636407
- Report Number(s):
- SRNL-STI-2018-00196; PII: S0360319918327137
- Journal Information:
- International Journal of Hydrogen Energy, Vol. 43, Issue 42; ISSN 0360-3199
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
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