Journal of Thermal Analysis and Calorimetry

, Volume 99, Issue 2, pp 443–457 | Cite as

The influence of mixed anionic composition of Mg–Al hydrotalcites on the thermal decomposition mechanism based on in situ study

  • Agnieszka Węgrzyn
  • Alicja Rafalska-Łasocha
  • Dorota Majda
  • Roman Dziembaj
  • Helmut Papp
Article

Abstract

A series of Mg/Al hydrotalcites with tailored content of carbonate and nitrate anions was prepared using precipitation method. A part of the obtained materials was additionally crystallized in hydrothermal conditions. Different hydrotalcite phases or domains may co-exist within one sample obtained at controlled conditions. Decomposition mechanism studied in situ (DRIFT, XRD) was different for the samples with high concentration of interlayer nitrate anions than for carbonate-containing sample. TG-QMS study of hydrothermally treated samples provided more precise data for quantitative description of decomposition steps of Mg/Al hydrotalcites containing different mixtures of nitrate and carbonate anions.

Keywords

Decomposition mechanism Nitrate-containing hydrotalcite In situ XRD In situ DRIFT TG-QMS 

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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2009

Authors and Affiliations

  • Agnieszka Węgrzyn
    • 1
  • Alicja Rafalska-Łasocha
    • 1
  • Dorota Majda
    • 2
  • Roman Dziembaj
    • 1
    • 2
  • Helmut Papp
    • 3
  1. 1.Faculty of ChemistryJagiellonian UniversityKrakowPoland
  2. 2.Regional Laboratory for Physicochemical Analyses and Structural ResearchJagiellonian UniversityKrakowPoland
  3. 3.Institute of Technical ChemistryUniversity of LeipzigLeipzigGermany

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