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dc.contributor.authorGray, E Math
dc.date.accessioned2021-05-24T04:28:26Z
dc.date.available2021-05-24T04:28:26Z
dc.date.issued2021
dc.identifier.issn0360-3199en_US
dc.identifier.doi10.1016/j.ijhydene.2021.02.025en_US
dc.identifier.urihttp://hdl.handle.net/10072/404624
dc.description.abstractA thermodynamic model is presented to aid the selection of compatible pairs of hydrogen storage alloys for service in a multi-stage metal-hydride compressor. The model is built around the concept of an ideal compressor in which all pairs of hydrides operate between the same working temperatures. The key feature of the model is a link between the thermodynamic characteristics of the hydrides in each pair (the entropy change ΔS and enthalpy change ΔH when the hydride is formed from the metal) that results from requiring that the heated low-pressure hydride is able to desorb to the cooled high-pressure metal at a unique intermediate pressure. This necessary linking places severe constraints on the choice of alloys, since ΔS and ΔH cannot be freely chosen and are in fact strongly correlated for hydrides with similar operating temperatures. The model is based on the van ‘t Hoff relation, which is derived from first principles and shown to be only approximately valid at the high hydrogen pressures of interest for vehicle filling stations. Pressure hysteresis and plateau slope are incorporated into the model. A case study of a two-stage compressor is presented, based on the curved van ‘t Hoff line and the experimentally determined effects of pressure hysteresis and plateau slope.en_US
dc.description.peerreviewedYesen_US
dc.languageEnglishen_US
dc.publisherElsevieren_US
dc.relation.ispartofpagefrom15702en_US
dc.relation.ispartofpageto15715en_US
dc.relation.ispartofissue29en_US
dc.relation.ispartofjournalInternational Journal of Hydrogen Energyen_US
dc.relation.ispartofvolume46en_US
dc.subject.fieldofresearchNanotechnologyen_US
dc.subject.fieldofresearchChemical Sciencesen_US
dc.subject.fieldofresearchEngineeringen_US
dc.subject.fieldofresearchcode1007en_US
dc.subject.fieldofresearchcode03en_US
dc.subject.fieldofresearchcode09en_US
dc.subject.keywordsScience & Technologyen_US
dc.subject.keywordsPhysical Sciencesen_US
dc.subject.keywordsChemistry, Physicalen_US
dc.subject.keywordsElectrochemistryen_US
dc.titleAlloy selection for multistage metal-hydride hydrogen compressors: A thermodynamic modelen_US
dc.typeJournal articleen_US
dc.type.descriptionC1 - Articlesen_US
dcterms.bibliographicCitationGray, EM, Alloy selection for multistage metal-hydride hydrogen compressors: A thermodynamic model, International Journal of Hydrogen Energy, 2021, 46 (29), pp. 15702-15715en_US
dc.date.updated2021-05-21T06:30:14Z
gro.hasfulltextNo Full Text
gro.griffith.authorGray, Evan M.


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