Publikationen

Cycle stability and hydration behavior of magnesium oxide and its dependence on the precursor-related particle morphology

Autor(en)
Georg Gravogl, Christian Knoll, Jan M. Welch, Werner Artner, Norbert Freiberger, Roland Nilica, Elisabeth Eitenberger, Gernot Friedbacher, Michael Harasek, Andreas Werner, Klaudia Hradil, Herwig Peterlik, Peter Weinberger, Danny Müller, Ronald Miletich
Abstrakt

Thermochemical energy storage is considered as an auspicious method for the recycling of medium-temperature waste heat. The reaction couple Mg(OH)2–MgO is intensely investigated for this purpose, suffering so far from limited cycle stability. To overcome this issue, Mg(OH)2, MgCO3, and MgC2O4·2H2O were compared as precursor materials for MgO production. Depending on the precursor, the particle morphology of the resulting MgO changes, resulting in different hydration behavior and cycle stability. Agglomeration of the material during cyclization was identified as main reason for the decreased reactivity. Immersion of the spent material in liquid H2O decomposes the agglomerates restoring the initial reactivity of the material, thus serving as a regeneration step.

Organisation(en)
Institut für Mineralogie und Kristallographie, Dynamik Kondensierter Systeme
Journal
Nanomaterials
Band
8
Anzahl der Seiten
14
ISSN
2079-4991
DOI
https://doi.org/10.3390/nano8100795
Publikationsdatum
10-2018
Publikationsstatus
Veröffentlicht
Peer-reviewed
Ja
ÖFOS 2012
104003 Anorganische Chemie, 104011 Materialchemie, 105113 Kristallographie
ASJC Scopus Sachgebiete
Chemical Engineering(all), Materials Science(all)
Link zum Portal
https://ucris.univie.ac.at/portal/de/publications/cycle-stability-and-hydration-behavior-of-magnesium-oxide-and-its-dependence-on-the-precursorrelated-particle-morphology(2980186f-c9ed-431b-816f-c9d675dd801c).html