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Ethanol transformation into higher hydrocarbons over HZSM-5 zeolite: Direct detection of radical species by in situ EPR spectroscopy

Paper ID Volume ID Publish Year Pages File Format Full-Text
49982 46775 2012 5 PDF Available
Title
Ethanol transformation into higher hydrocarbons over HZSM-5 zeolite: Direct detection of radical species by in situ EPR spectroscopy
Abstract

HZSM-5 (Si/Al ratio = 40) zeolite is an efficient catalyst for ethanol transformation due to its capacity to maintain a high activity in C3 + hydrocarbons formation with time-on-stream (TOS) and this in spite of a great loss of acidity and microporosity and a high coke content deposited inside the pores of the zeolite. A study by in situ Electron Paramagnetic Resonance (EPR) spectroscopy in ethylene conversion to hydrocarbons showed that a fraction of radicals was active.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► HZSM-5(Si/Al = 40) is found to be a stably and selective catalyst. ► Ethanol transformation is accompanied by a great loss of acidity and microporosity. ► 25% of radicals formed are consumed during the ethylene oligomerization. ► The Brønsted acid sites and radicals are active sites for ethylene oligomerization. ► This study highlights the reactivity of radicals in ethylene oligomerization.

Keywords
Brønsted acidity; Coke composition; In situ EPR; Radicals; Zeolite; Ethylene oligomerization
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Ethanol transformation into higher hydrocarbons over HZSM-5 zeolite: Direct detection of radical species by in situ EPR spectroscopy
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 27, 5 October 2012, Pages 119–123
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