Thermal stability studies of zeolites A and X synthesized from South African coal fly ash

Nicholas M. Musyoka, Leslie F. Petrik, Eric Hums, Andreas Kuhnt, Wilhelm Schwieger

Research output: Journal PublicationArticlepeer-review

82 Citations (Scopus)

Abstract

The thermal stability of zeolites A and X synthesized from coal fly ash was studied by evaluation of TGA-DTA curves obtained on increasing the temperature and by in-situ temperature-programmed XRD analysis. It was found that zeolites A and X were both stable up to approximately 800 °C and retained their characteristic diffraction peaks up to 440 °C, meaning the crystal structure was still stable. Of particular interest was that zeolite X, which has a unique hierarchical morphology, was thermally stable and was, hence, suitable for applications requiring elevated temperatures, for example catalysis and pollution control.

Original languageEnglish
Pages (from-to)575-582
Number of pages8
JournalResearch on Chemical Intermediates
Volume41
Issue number2
DOIs
Publication statusPublished - Feb 2015
Externally publishedYes

Keywords

  • Fly ash
  • In-situ XRD
  • Thermal stability
  • Zeolites

ASJC Scopus subject areas

  • General Chemistry

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