Tuning clathrate hydrates for hydrogen storage

  1. Get@NRC: Tuning clathrate hydrates for hydrogen storage (Opens in a new window)
DOIResolve DOI: http://doi.org/10.1038/nature03457
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Journal titleNature
Pages743746; # of pages: 4
AbstractThe storage of large quantities of hydrogen at safe pressures1 is a key factor in establishing a hydrogen-based economy. Previous strategies—where hydrogen has been bound chemically2, adsorbed in materials with permanent void space3 or stored in hybrid materials that combine these elements3—have problems arising from either technical considerations or materials cost2, 3, 4, 5. A recently reported6, 7, 8 clathrate hydrate of hydrogen exhibiting two different-sized cages does seem to meet the necessary storage requirements; however, the extreme pressures (approx 2 kbar) required to produce the material make it impractical. The synthesis pressure can be decreased by filling the larger cavity with tetrahydrofuran (THF) to stabilize the material9, but the potential storage capacity of the material is compromised with this approach. Here we report that hydrogen storage capacities in THF-containing binary-clathrate hydrates can be increased to approx4 wt% at modest pressures by tuning their composition to allow the hydrogen guests to enter both the larger and the smaller cages, while retaining low-pressure stability. The tuning mechanism is quite general and convenient, using water-soluble hydrate promoters and various small gaseous guests.
Publication date
AffiliationNational Research Council Canada; NRC Steacie Institute for Molecular Sciences
Peer reviewedNo
NPARC number12339304
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Record identifier4d740b2c-69fd-4673-aade-cf4dfb721c41
Record created2009-09-11
Record modified2016-05-09
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