Abstract
Synchrotron infrared microspectroscopy has identified with high temporal resolution (down to 0.25 s) the initial events occurring when methanol vapour is contacted with a crystal of zeolite HZSM-5. The first alkenes are generated directly from methoxy groups formed at the acid sites via their deprotonation. These alkenes can either desorb directly or oligomerise and cyclise to form dimethylcyclopentenyl cations. The oligomeric and dimethylcyclopentenyl cations are the first major components of the hydrocarbon pool that precede aromatic hydrocarbons and lead to indirect alkene formation. The technique observes these events in real time.
Original language | English |
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Pages (from-to) | 6564-6570 |
Number of pages | 7 |
Journal | ACS Catalysis |
Volume | 9 |
Issue number | 7 |
Early online date | 17 Jun 2019 |
DOIs | |
Publication status | Published - 5 Jul 2019 |
Keywords
- synchrotron infrared microspectroscopy
- ZSM-5
- methanol-to-hydrocarbons
- hydrocarbon pool
- carbon-carbon bond formation
- micro-FTIR
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Profiles
-
Russell Howe
- Chemistry (Research Theme)
- School of Natural & Computing Sciences, Chemistry - Chair of Chemistry
Person: Academic