NaBH4 Sodalites, Synthesized by Modified Methods: (1) Autothermal Synthesis and (2) Crossover Reaction from Gel to Melt Flow

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dc.identifier.uri http://dx.doi.org/10.15488/1533
dc.identifier.uri http://www.repo.uni-hannover.de/handle/123456789/1558
dc.contributor.author Buhl, Josef-Christian
dc.date.accessioned 2017-05-22T11:59:04Z
dc.date.available 2017-05-22T11:59:04Z
dc.date.issued 2017
dc.identifier.citation Buhl, J.-C.: NaBH4 Sodalites, Synthesized by Modified Methods: (1) Autothermal Synthesis and (2) Crossover Reaction from Gel to Melt Flow. In: Advances in Chemical Engineering and Science 7 (2017), S. 108-124. DOI: https://doi.org/10.4236/aces.2017.72009
dc.description.abstract NaBH4 sodalites were obtained by two new modified methods of crystallization: (1) autothermal synthesis and (2) crystallization with crossover from gel to melt flow in NaOH flux. Syntheses results were presented according to XRD, SEM and FTIR. Besides important features of both synthesis procedures product properties like crystal size and morphology were investigated. Spherical agglomerates of microcrystalline sodalite of composition Na7[AlSiO4]6BH4(H2O)2 were already observed after 4 h without any external heating by the autothermal procedure. Sodalites of the same average composition but in form of agglomerated nanoparticles are crystallized after very short times (2 h 30’) by the crossover reaction from gel to melt flow. Hydrogen release by heating was further studied for two selected samples with comparable composition from each synthesis procedure. Total hydrogen release by hydrolysis reaction with the internal cage water was found during heating of the autothermal product in synthetic air up to 550°C. In contrast hydrogen release from the nanocrystalline sample of crossover synthesis was not completed when heated under the same conditions. These differences were discussed in terms of crystal size and an earlier loss of the internal water from the nanocrystals of the crossover synthesis eng
dc.language.iso eng
dc.publisher Delaware : Scientific Research Publishing Inc.
dc.relation.ispartofseries Advances in Chemical Engineering and Science 7 (2017), Nr. 2
dc.rights CC BY 4.0 Unported
dc.rights.uri https://creativecommons.org/licenses/by/4.0/
dc.subject Modified Synthesis eng
dc.subject Autothermal Process eng
dc.subject Combined Synthesis Procedures eng
dc.subject Tailored Tetrahydroborate Sodalites eng
dc.subject.ddc 660 | Technische Chemie ger
dc.title NaBH4 Sodalites, Synthesized by Modified Methods: (1) Autothermal Synthesis and (2) Crossover Reaction from Gel to Melt Flow
dc.type article
dc.type Text
dc.relation.essn 2160-0406
dc.relation.issn 2160-0392
dc.relation.doi https://doi.org/10.4236/aces.2017.72009
dc.bibliographicCitation.issue 2
dc.bibliographicCitation.volume 7
dc.bibliographicCitation.firstPage 108
dc.bibliographicCitation.lastPage 124
dc.description.version publishedVersion
tib.accessRights frei zug�nglich


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