Thermal decomposition of barium valerate in argon

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Abstract

The thermal decomposition of barium valerate (Ba(C4H9CO2)(2)/Ba-pentanoate) was studied in argon by means of thermogravimetry, differential thermal analysis, IR-spectroscopy, X-ray diffraction and hot-stage optical microscopy. Melting takes place in two different steps, at 200 degrees C and 280 degrees C and evidence was found for the solidification of the melt at 380-440 degrees C, i.e. simultaneously with the onset of decomposition. Between 400 degrees C and 520 degrees C (Ba(C4H9CO2)(2) decomposes in two main steps, first into BaCO3 with release of C4H9COC4H9 (5-nonanone), whereas final conversion to BaO takes place with release of CO2. Elemental carbon that is left as a by-product is finally slowly burned by the residual oxygen present in the Ar atmosphere. (C) 2015 Elsevier B.V. All rights reserved.
Original languageEnglish
JournalJournal of Analytical and Applied Pyrolysis
Volume116
Pages (from-to)120-128
ISSN0165-2370
DOIs
Publication statusPublished - 2015

Keywords

  • Barium valerate
  • Thermal decomposition
  • TG/DTA
  • FTIR
  • X-ray powder diffraction

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