Methoxy ad-species in MFI zeotypes during methane exposure and methanol desorption followed by in situ IR spectroscopy
Artikel i vetenskaplig tidskrift, 2020

The formation and evolution of methoxy ad-species in MFI zeotypes after CH4 exposure, and during temperature programmed desorption of CH3OH have been investigated in situ with diffuse reflectance Fourier transform infrared spectroscopy. Fe and/or Al atoms have been incorporated in framework position prior to crystallization and the influence of the resulting acidity on CH4 activation and CH3OH desorption has been examined. The results show that the presence of Fe promotes CH4 activation and that methanol is more strongly bound to the zeotype in the presence of Al. Because CH4 activation and CH3OH extraction are two of the key steps in the direct conversion of methane to methanol, our results indicate that Al-free zeotypes containing Fe atoms pinpoint important catalyst design parameters needed for this reaction.

MFI

Infrared

Methoxy

Methanol

Zeotype

Methane

Författare

Simone Creci

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Polymerteknologi

Kompetenscentrum katalys (KCK)

Xueting Wang

Kompetenscentrum katalys (KCK)

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Polymerteknologi

Per-Anders Carlsson

Kompetenscentrum katalys (KCK)

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Per-Anders Carlsson Group

Anna Martinelli

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Anna Martinelli Group

Magnus Skoglundh

Kompetenscentrum katalys (KCK)

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Polymerteknologi

Catalysis Today

0920-5861 (ISSN)

Vol. In Press

Ämneskategorier

Oorganisk kemi

Annan kemi

Organisk kemi

DOI

10.1016/j.cattod.2020.06.053

Mer information

Senast uppdaterat

2020-08-20