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Skeletal isomerization of 1-butene over micro/mesoporous materials based on FER zeolite

Paper ID Volume ID Publish Year Pages File Format Full-Text
40781 45865 2012 12 PDF Available
Title
Skeletal isomerization of 1-butene over micro/mesoporous materials based on FER zeolite
Abstract

Skeletal isomerization of 1-butene has been studied over composite micro/mesoporous zeolitic catalysts prepared by the recrystallization of ferrierite (FER) in alkaline solutions in the presence of cethyltrimethylammonium bromide and by the desilication of FER in alkaline solutions. Desilication procedure led to the creation of large mesopores in zeolite crystal with broad distribution of size. Recrystallization procedure resulted in two types of mesoporosity: uniform intracrystalline mesopores homogeneously distributed along the crystal and intercrystalline ordered mesoporous layers covering zeolite crystal. Recrystallized materials showed improved catalytic performance in skeletal isomerization of 1-butene with respect to both parent and desilicated ferrierites. The effect is due to the improved accessibility of the acid sites and the creation of new pore mouths, in which the active carbonaceous species responsible for selective pseudo-monomolecular pathway can be formed. The improved stability of catalytic activity with time on stream is due to coating of ferrierite crystals with mesoporous layes, which prevent the deactivation of the catalysts. The best catalytic performance was achieved over composite micro/mesoporous materials with intermediate degree of recrystallyzation due to proper balance between zeolitic and mesoporous phases and the amount and density of the acid sites.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (131 K)Download as PowerPoint slideHighlights► Micro/mesoporous catalysts were prepared by recrystallization of FER zeolite. ► Recrystallized FER showed improved catalytic performance in butene-1 isomerization. ► The enhanced activity is due to higher accessibility of the acid sites. ► The improved selectivity and stability is due to coating of FER with mesoporous phase.

Keywords
Isomerization; n-Butene-1; Ferrierite; Micro/mesoporous catalysts
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Skeletal isomerization of 1-butene over micro/mesoporous materials based on FER zeolite
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volumes 441–442, 28 October 2012, Pages 124–135
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
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Full-text PDF Download
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Any Questions? feel free to contact us