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

doi:10.1007/s11164-013-1211-3

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 Publication › Article › peer-review

113 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 language	English
Pages (from-to)	575-582
Number of pages	8
Journal	Research on Chemical Intermediates
Volume	41
Issue number	2
DOIs	https://doi.org/10.1007/s11164-013-1211-3
Publication status	Published - Feb 2015
Externally published	Yes

Free Keywords

Fly ash
In-situ XRD
Thermal stability
Zeolites

ASJC Scopus subject areas

General Chemistry

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10.1007/s11164-013-1211-3

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title = "Thermal stability studies of zeolites A and X synthesized from South African coal fly ash",

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.",

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AU - Musyoka, Nicholas M.

AU - Petrik, Leslie F.

AU - Hums, Eric

AU - Kuhnt, Andreas

AU - Schwieger, Wilhelm

PY - 2015/2

Y1 - 2015/2

N2 - 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.

AB - 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.

KW - Fly ash

KW - In-situ XRD

KW - Thermal stability

KW - Zeolites

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JO - Research on Chemical Intermediates

JF - Research on Chemical Intermediates

IS - 2

ER -

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

Abstract

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