Thermal studies of metal promoted sulfate zirconia
- Western Kentucky Univ., Boling Green, KY (United States); and others
SO{sub 4}{sup 2-}ZrO{sub 2} is considered to be a catalyst with superacid properties. Thermal analysis of 1% an 5% it sulfate zirconia and Fe/Mn salt treated sulfate zirconia samples show different species evolved during dynamic heating. TG-MS and TG-FTIR were used to identify the evolved species. Mechanisms of different species occur in the complex were studied through on-line analysis. The two HCl peaks on MS data indicated HCl first came out by decomposition of H{sub 2}PtCl{sub 6} and a later somehow formed HCl. SO{sub 2} and SO profiles both show a peak maxima and a continuum which are corresponded with DTG results. This indicated that SO{sub 4}{sup 2-} is adsorbed on both surface and inner side of the zirconia sample. The adsorption of sulfate ion on zirconia gives rise to a much higher temperature for the phase transformation of zirconia to occur.
- OSTI ID:
- 370302
- Report Number(s):
- CONF-960376--
- Country of Publication:
- United States
- Language:
- English
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