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Thermal decomposition of basic aluminium-ammonium sulfate (BAAS) in hydrogen atmosphere

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Abstract

The stages of thermal decomposition of basic aluminium-ammonium sulfate (BAAS) in hydrogen atmosphere were studied with use of differential thermal analysis (DTA), thermogravimetric (TG), X-ray diffraction phase analysis (XRD), and chemical analyses. It has been found that hydrogen greatly influences the process of the desulfurization of the investigated compound: this process occurs at lower temperatures as compared to the desulfurization process in air. The final decomposition product of the basic salt at 1223 K isγ-Al2O3. The experimental part is preceded by the thermodynamic analysis of the desulfurization process of BAAS in hydrogen atmosphere, and its results have been correlated with experimental tests.

Zusammenfassung

Die Stufen der thermischen Zersetzung von basischem Aluminium Ammonium Sulfat (BAAS) in WasserstoffatmosphÄre wurden unter Verwendung von Differenzthermoanalyse (DTA), Thermogravimetrie (TG), röntgenographischer Phasenanalytik (XRD) und chemischer Analytik untersucht. Es wurde festgestellt, dass Wasserstoff den Desulfurierungsprozess der untersuchten Verbindung stark beeinflusst, indem dieser bei tieferer Temperatur ablÄuft als die Desulfurierung in Luft. Das Endprodukt der Zersetzung des basischen Salzes bei 1223 K istγ-Al2O3. Die experimentellen Resultate wurden mit den Ergebnissen einer vorgÄngig durchgeführten thermodynamischen Betrachtung der Desulfurierung von BAAS in WasserstoffatmosphÄre korreliert.

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Authors and Affiliations

  1. Institute of Chemistry in Plock Branch of Warsaw University of Technology, 09-400, Plock, Poland

    B. Pacewska & J. Pysiak

Authors
  1. B. Pacewska
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  2. J. Pysiak
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Pacewska, B., Pysiak, J. Thermal decomposition of basic aluminium-ammonium sulfate (BAAS) in hydrogen atmosphere. Journal of Thermal Analysis 37, 1665–1672 (1991). https://doi.org/10.1007/BF01912195

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  • DOI: https://doi.org/10.1007/BF01912195

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