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Enhanced catalytic activity for butane isomerization with alumina-promoted tungstated mesoporous zirconia

Paper ID Volume ID Publish Year Pages File Format Full-Text
43603 45979 2007 9 PDF Available
Title
Enhanced catalytic activity for butane isomerization with alumina-promoted tungstated mesoporous zirconia
Abstract

Mesoporous zirconia, synthesized from surfactant templating, was used to disperse alumina and tungstate as a catalyst (denoted as AW/m-ZrO2) for the isomerization of n-butane. At a relatively low temperature of calcination (700 °C), the catalyst (AW/m-700) performed exceptionally well, both in maximum rate and stability, at a temperature of 250 °C. This was lower than the temperature needed by other tungstated zirconia-based catalysts reported so far. This lower temperature of calcination leads to the presence of more Brönsted acid sites with higher acid strength. In comparison with the normal dense phase zirconia catalyst, AW/m-ZrO2 catalyst showed higher n-butane isomerization activity than the corresponding AW/d-ZrO2 catalyst, which has about the same surface area. The difference in catalytic activity was attributed to the higher degree of dispersion of tungstate on the surface of m-ZrO2.

Graphical abstractAlumina-promoted tungstated mesoporous zirconia (AW/m-ZrO2) catalysts were synthesized and tested on n-butane isomerization. They possess high catalytic activity and stability. The composition of acid sites on AW/m-ZrO2 catalysts calcined at different temperatures was then correlated to their catalytic performances. The unusually high catalytic activity was attributed to better dispersion of tungstate species on zirconia. Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Tungstated zirconia; Alkane isomerization; Mesoporous zirconia; EXAFS; XPS; Surface acidity
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Enhanced catalytic activity for butane isomerization with alumina-promoted tungstated mesoporous zirconia
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 323, 30 April 2007, Pages 9–17
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
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Any Questions? feel free to contact us