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Journal Article

Mechanical stress induced activity and phase composition changes in sulfated zirconia catalysts

MPS-Authors
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Klose,  Barbara S.
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Jentoft,  Rolf E.
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Hahn,  Alexander H. P.
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Ressler,  Thorsten
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Kröhnert,  Jutta
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Wrabetz,  Sabine
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Yang,  Xiaobo
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Jentoft,  Friederike C.
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Citation

Klose, B. S., Jentoft, R. E., Hahn, A. H. P., Ressler, T., Kröhnert, J., Wrabetz, S., et al. (2003). Mechanical stress induced activity and phase composition changes in sulfated zirconia catalysts. Journal of Catalysis, 217(2), 487-490. doi:10.1016/S0021-9517(02)00087-8.


Cite as: https://hdl.handle.net/11858/00-001M-0000-0011-1168-7
Abstract
Sulfated zirconia and Mn-promoted sulfated zirconia (0.5 and 2.0 wt% Mn) catalysts were subjected to mechanical stress. Pressing (10 min 540 MPa), milling (10 min vibrating mill), and grinding (manually, 10 min agate mortar) effected a partial phase transformation from the tetragonal to the monoclinic phase of ZrO2. The mechanical stress also reduced the n-butane isomerization rate (1 kPa n-butane, 323-378K, atmospheric pressure) to 30% and less of that measured for untreated catalyst. Standard sample preparation techniques for analytical methods thus alter the structural and catalytic properties of sulfated zirconia. Attempts to correlate data from different methods are futile unless the integrity of the sulfated zirconia is ensured.