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Reactions of dimethylether in single crystals of the silicoaluminophosphate STA-7 studied via Operando synchrotron infrared microspectroscopy

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Author(s)

Russell F. Howe, Suwardiyanto, David J. Price, Maria Castro, Paul A. Wright, Alex Greenaway, Mark D. Frogley, Gianfelice Cinque

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Abstract

Synchrotron infrared micro-spectroscopy has been applied to measure in situ the reaction of dimethylether in single crystals of the silicoaluminophosphate STA-7. The crystals are found to contain a uniform and homogeneous distribution of acidic hydroxyl groups. Dimethylether is hydrogen bonded to the hydroxyl groups at low temperatures, but evidence is found for dissociation to form surface methoxy groups above 473 K, and aromatic hydrocarbon pool species above 573 K. From time resolved infrared measurements coupled with MS analysis of evolved products it is concluded that alkene formation occurs via a direct mechanism from reaction of dimethylether with surface methoxy groups.

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Details

Original languageEnglish
Pages (from-to)199-212
Number of pages14
JournalTopics in Catalysis
Volume61
Issue number3-4
Early online date16 Jan 2018
DOIs
Publication statusPublished - Apr 2018

    Research areas

  • Dimethylether, Hydrocarbon pool, Infrared microspectroscopy, STA-7

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