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Thermogravimetric and X-ray diffraction investigation on carbonated lanthanum oxide and lanthanum hydroxide formed in humid CO2 atmosphere

Authors
  • Haibel, Elena1
  • Berendts, Stefan2
  • Walter, Dirk1, 3
  • 1 Justus-Liebig-Universität, Gefahrstofflaboratorien Chemie und Physik am Institut für Arbeitsmedizin, Aulweg 129, Giessen, 35392, Germany , Giessen (Germany)
  • 2 Technische Universität Berlin, Institut für Chemie, Strasse des 17. Juni 135, Berlin, 10623, Germany , Berlin (Germany)
  • 3 Justus-Liebig-Universität, Institut für Anorganische und Analytische Chemie, Heinrich-Buff-Ring 17, Giessen, 35392, Germany , Giessen (Germany)
Type
Published Article
Journal
Journal of Thermal Analysis and Calorimetry
Publisher
Springer Netherlands
Publication Date
Apr 17, 2018
Volume
134
Issue
1
Pages
261–267
Identifiers
DOI: 10.1007/s10973-018-7256-1
Source
Springer Nature
Keywords
License
Yellow

Abstract

Lanthanum oxide compounds are of great interest because of their wide range of applications (e.g., heterogeneous catalysis). It is well known that lanthanum oxide compounds, like lanthanum oxide, have to be handled carefully in a humid atmosphere due to their hydration affinity. Furthermore, lanthanum hydroxide has a high CO2 affinity and partially forms basic carbonates. The amount of carbonate impurities that are formed in air remains nearly constant over a long time. To investigate the carbonation process in more detail, lanthanum hydroxide and lanthanum oxide were stored in a controlled humid CO2 atmosphere. The results of thermal analysis (TA) and X-ray diffraction (XRD) prove a transformation of lanthanum hydroxide as well as lanthanum oxide to lanthanum carbonate via lanthanum hydroxide carbonate.

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