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High-pressure adsorptive storage of hydrogen in MIL-101 (Cr) and AX-21 for mobile applications: Cryocharging and cryokinetics

High-pressure adsorptive storage of hydrogen in MIL-101 (Cr) and AX-21 for mobile applications: Cryocharging and cryokinetics
High-pressure adsorptive storage of hydrogen in MIL-101 (Cr) and AX-21 for mobile applications: Cryocharging and cryokinetics

Current state-of-the-art methods consist of containing high-pressure compressed hydrogen in composite cylinders, with solid-state hydrogen storage materials an alternative that could improve on storage performance by enhancing volumetric densities. A new strategy that uses cryogenic temperatures to load hydrogen (cryocharging) is proposed and analysed in this work, comparing densities and final storage pressures for empty cylinders and containers with the high-surface area materials MIL-101 (Cr) and AX-21. Results show cryocharging as a viable option, as it can substantially lower the charging (at 77 K) and final pressures (at 298 K) for the majority of the cases considered. Kinetics are an equally important requirement for hydrogen storage systems, so the effective diffusivities at these conditions for both materials were calculated, and showed values comparable to the ones estimated in metal-organic frameworks and zeolites from quasielastic neutron scattering and molecular simulations. High-surface area materials tailored for hydrogen storage are a promising route for storage in mobile applications and results show that cryocharging is a promising strategy for hydrogen storage systems, since it increases volumetric densities and avoids energy penalties of operating at high pressures and/or low temperatures.

Adsorption, Hydrogen storage, Hydrogen storage systems, Nanoporous materials
0264-1275
1086-1094
Bimbo, Nuno
53d9fc24-e2c1-4e2d-8d75-8dc640d8adda
Xu, Wesley
1b9c48ba-eaf2-46a6-b30a-a40e6ce7ee77
Sharpe, Jessica E.
c8f4c69d-b116-49d1-ab40-71a5807b6a59
Ting, Valeska P.
d4381878-2aad-4a3f-a7cc-021a7f7075eb
Mays, Timothy J.
d02351c7-1d8f-4a9e-8d16-675c1f7b3635
Bimbo, Nuno
53d9fc24-e2c1-4e2d-8d75-8dc640d8adda
Xu, Wesley
1b9c48ba-eaf2-46a6-b30a-a40e6ce7ee77
Sharpe, Jessica E.
c8f4c69d-b116-49d1-ab40-71a5807b6a59
Ting, Valeska P.
d4381878-2aad-4a3f-a7cc-021a7f7075eb
Mays, Timothy J.
d02351c7-1d8f-4a9e-8d16-675c1f7b3635

Bimbo, Nuno, Xu, Wesley, Sharpe, Jessica E., Ting, Valeska P. and Mays, Timothy J. (2016) High-pressure adsorptive storage of hydrogen in MIL-101 (Cr) and AX-21 for mobile applications: Cryocharging and cryokinetics. Materials & Design, 89, 1086-1094. (doi:10.1016/j.matdes.2015.10.069).

Record type: Article

Abstract

Current state-of-the-art methods consist of containing high-pressure compressed hydrogen in composite cylinders, with solid-state hydrogen storage materials an alternative that could improve on storage performance by enhancing volumetric densities. A new strategy that uses cryogenic temperatures to load hydrogen (cryocharging) is proposed and analysed in this work, comparing densities and final storage pressures for empty cylinders and containers with the high-surface area materials MIL-101 (Cr) and AX-21. Results show cryocharging as a viable option, as it can substantially lower the charging (at 77 K) and final pressures (at 298 K) for the majority of the cases considered. Kinetics are an equally important requirement for hydrogen storage systems, so the effective diffusivities at these conditions for both materials were calculated, and showed values comparable to the ones estimated in metal-organic frameworks and zeolites from quasielastic neutron scattering and molecular simulations. High-surface area materials tailored for hydrogen storage are a promising route for storage in mobile applications and results show that cryocharging is a promising strategy for hydrogen storage systems, since it increases volumetric densities and avoids energy penalties of operating at high pressures and/or low temperatures.

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More information

Accepted/In Press date: 15 October 2015
e-pub ahead of print date: 19 October 2015
Published date: 5 January 2016
Keywords: Adsorption, Hydrogen storage, Hydrogen storage systems, Nanoporous materials

Identifiers

Local EPrints ID: 435208
URI: http://eprints.soton.ac.uk/id/eprint/435208
ISSN: 0264-1275
PURE UUID: 70fabfbc-8ab6-421e-9d12-7add4bc86ec2
ORCID for Nuno Bimbo: ORCID iD orcid.org/0000-0001-8740-8284

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Date deposited: 25 Oct 2019 16:30
Last modified: 16 Apr 2020 00:45

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Contributors

Author: Nuno Bimbo ORCID iD
Author: Wesley Xu
Author: Jessica E. Sharpe
Author: Valeska P. Ting
Author: Timothy J. Mays

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