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Heptamethylbenzenium cation formation and the correlated reaction pathway during methanol-to-olefins conversion over DNL-6

Paper ID Volume ID Publish Year Pages File Format Full-Text
54507 47012 2014 5 PDF Available
Title
Heptamethylbenzenium cation formation and the correlated reaction pathway during methanol-to-olefins conversion over DNL-6
Abstract

•Formation of heptamethylbenzenium ion during MTO reaction was definitely confirmed by combination of NMR with GC–MS measurements.•The high reactivity of HMMC/heptaMB+ was further evidenced and correlated with the variation of methanol conversion.•Side chain methylation mechanism was suggested to be the main reaction route for methanol conversion over DNL-6.

Methanol conversion over SAPO molecular sieve DNL-6 was investigated from the view point of the reaction mechanism. The organic materials confined in the cavities of DNL-6 were mostly polymethylbenezenes. By combination of in situ NMR study with ex situ GC–MS measurements, the structure of heptamethylbenzenium ion (heptaMB+) formed during MTO reaction was definitely confirmed. Further evidences from the mass spectra and 13C solid-state NMR spectra in the isotopic switch experiments showed that the side chain methylation mechanism was the main reaction route for olefin formation from hydrocarbon pool species.

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Keywords
Methanol conversion; MTO; Olefins; Catalysis; Mechanism
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Heptamethylbenzenium cation formation and the correlated reaction pathway during methanol-to-olefins conversion over DNL-6
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 226, 1 May 2014, Pages 47–51
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
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