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Electrospun ceria-based nanofibers for the facile assessment of catalyst morphological stability under harsh HCl oxidation reaction conditions

Paper ID Volume ID Publish Year Pages File Format Full-Text
53441 46969 2015 12 PDF Available
Title
Electrospun ceria-based nanofibers for the facile assessment of catalyst morphological stability under harsh HCl oxidation reaction conditions
Abstract

•Electrospinning of mixed Ce + Zr oxide nanofibers.•Stability versus activity of mixed Ce + Zr oxide nanofibers in the Deacon process.•Chlorination of CeO2 during start up and shut down of the reactor.•Stability and activity of nanoparticle-based CeO2 nanofibers.

Long-term stability is a major issue in the development of new catalysts and in the improvement of existing catalysts. In general, high-surface-area materials in catalysis are not well suited as model materials for testing catalyst stability, because changes in the morphology are difficult to recognize with electron microscopy. Therefore, we developed a new type of model catalyst in the form of nanofibers for assessing structural changes of CeO2-based catalysts under highly corrosive Deacon reaction conditions. In the Deacon process, chlorine is recycled by heterogeneously catalyzed gas-phase oxidation of HCl, using metal oxide catalysts. The Deacon process generally suffers from degradation of the catalyst due to in-depth chlorination. One-dimensional CeO2-based nanofibers with a well-defined morphology and surface enable direct visualization of structural changes before and after the Deacon reaction, simply employing scanning electron microscopy supported by X-ray diffraction and physisorption measurements. Preparing solid solutions of CeO2 and ZrO2 has shown to improve both the chemical stability and the activity of the catalyst.

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Keywords
HCl oxidation; Deacon process; Mixed cerium and zirconium dioxide; Model catalysis; Electrospinning
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Electrospun ceria-based nanofibers for the facile assessment of catalyst morphological stability under harsh HCl oxidation reaction conditions
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 253, 15 September 2015, Pages 207–218
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
Online Support
Any Questions? feel free to contact us