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The effect of crystal sizes of HZSM-5 zeolites in ethanol conversion to propylene

Paper ID Volume ID Publish Year Pages File Format Full-Text
50676 46808 2012 6 PDF Available
Title
The effect of crystal sizes of HZSM-5 zeolites in ethanol conversion to propylene
Abstract

Three ZSM-5 zeolites with different crystal sizes were prepared and characterized by SEM, XRD, adsorption/desorption of N2, NH3-TPD, Py-IR and TG-DTA techniques. The results show that the acidic properties of HZSM-5 catalysts are very similar, but their textual properties are strongly influenced by crystal size. Their catalytic performances for the ethanol conversion to propylene were investigated in a continuous flow fixed-bed micro-reactor. In comparison with the large-sized HZSM-5, the small-sized HZSM-5 shows higher propylene selectivity and better stability, which reveals that decreasing the crystal size of zeolite is of benefit to ethanol conversion to propylene.

Graphical abstractDifferent crystal size HZSM-5 catalysts for ethanol conversion to propylene were successfully prepared by different crystallization methods, and the catalyst stability and propylene selectivity are strongly influenced by the crystal size.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Different crystal size ZSM-5 zeolites were successfully synthesized. ► The prepared HZSM-5 catalysts have similar Si/Al2 ratio and acidity. ► The propylene selectivity is strongly influenced by the zeolite crystal size. ► The zeolite crystal size affects greatly the catalyst stability.

Keywords
HZSM-5 zeolite; Crystal size; Ethanol to propylene
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The effect of crystal sizes of HZSM-5 zeolites in ethanol conversion to propylene
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 21, 5 May 2012, Pages 52–57
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