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Composite ferrite catalyst for ethylbenzene dehydrogenation: Enhancement of potassium stability and catalytic performance by phase selective doping

Paper ID Volume ID Publish Year Pages File Format Full-Text
41297 45884 2011 6 PDF Available
Title
Composite ferrite catalyst for ethylbenzene dehydrogenation: Enhancement of potassium stability and catalytic performance by phase selective doping
Abstract

Composite ferrite catalyst consisting of pristine irregular KFeO2 crystallites and well developed hexagonal nanoplates of selectively doped (2%Ce,2%Cr)-K2Fe22O34 was prepared, characterized (XRD, HR-TEM, SEM-EDX, BET) and tested for potassium volatilization and catalytic performance in ethylbenzene dehydrogenation. In comparison with separate parent ferrite phases the obtained composite catalyst exhibited superior overall catalytic performance (stability and activity), combining the best features of its components. Indeed, it exhibits the conversion and selectivity to styrene monomer of the most active phase of 2% Ce, 2% Cr-doped K2Fe22O34, whereas the thermal stability of potassium was even higher than in the most stable KFeO2 phase.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (215 K)Download as PowerPoint slideHighlights► Functional morphological model of a robust ferrite EBDH catalyst was developed. ► Selective doping of K2Fe22O34 with Ce, Cr is essential for stable active and selective K-Fe-O catalyst. ► Surface ferrites equilibrium revealed from UHV studies was realized in practice.

Keywords
Styrene catalyst; Potassium ferrites; Potassium loss; KFeO2; K2Fe22O34; Stability; Iron oxide; Ethylbenzene dehydrogenation; EBDH
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Composite ferrite catalyst for ethylbenzene dehydrogenation: Enhancement of potassium stability and catalytic performance by phase selective doping
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 407, Issues 1–2, 4 November 2011, Pages 100–105
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