Please use this identifier to cite or link to this item: https://hdl.handle.net/10216/69767
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dc.creatorM. J. F. Ferreira
dc.creatorV. R. Fernandes
dc.creatorC. M. Rangel
dc.creatorL. Gales
dc.creatorA. M. F. R. Pinto
dc.date.accessioned2019-02-09T00:18:29Z-
dc.date.available2019-02-09T00:18:29Z-
dc.date.issued2009
dc.identifier.issn1480-2422
dc.identifier.othersigarra:63385
dc.identifier.urihttps://repositorio-aberto.up.pt/handle/10216/69767-
dc.description.abstractIn this paper, for the first time, an experimental investigation is presented of five successive loadings of reactant alkaline solution of sodium borohydride (NaBH4) for hydrogen generation, using an improved nickel-based powder catalyst, under uncontrolled ambient conditions. The experiments were performed in two batch reactors with internal volumes of 0.646 l and of 0.369 l. The compressed hydrogen generated, at pressures below hydrogen critical pressure, gives emphasis on the importance of considering solubility effects during reaction, leading to storage of hydrogen in the liquid phase inside the reactor. The present work suggests that the sodium metaborate by-product formed by the alkaline hydrolysis of NaBH4, in a closed pressure vessel without temperature control, is NaBO2.xH2O, with x ≥ 2. The data obtained in this work lends credit to x ≈ 2, which was discussed based on the XRD results, and this call for increased caution in the definition of the hydrolysis reaction of NaBH4 up to temperatures of 333 K and up to pressures of 0.13 MPa
dc.language.isoeng
dc.rightsopenAccess
dc.rights.urihttps://creativecommons.org/licenses/by-nc/4.0/
dc.subjectCiências Tecnológicas, Outras ciências da engenharia e tecnologias
dc.subjectTechnological sciences, Other engineering and technologies
dc.titleSuccessive loadings of reactant in the hydrogen generation by hydrolysis of sodium borohydride in batch reactors
dc.typeArtigo em Revista Científica Internacional
dc.contributor.uportoFaculdade de Engenharia
dc.subject.fosCiências da engenharia e tecnologias::Outras ciências da engenharia e tecnologias
dc.subject.fosEngineering and technology::Other engineering and technologies
Appears in Collections:FEUP - Artigo em Revista Científica Internacional

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