Methoxy ad-species in MFI zeotypes during methane exposure and methanol desorption followed by in situ IR spectroscopy
Artikel i vetenskaplig tidskrift, 2021
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.
Methane
Methoxy
Methanol
Infrared
MFI
Zeotype
Författare
Simone Creci
Kompetenscentrum katalys
Chalmers, Kemi och kemiteknik, Tillämpad kemi
Xueting Wang
Kompetenscentrum katalys
Chalmers, Kemi och kemiteknik, Tillämpad kemi
Per-Anders Carlsson
Chalmers, Kemi och kemiteknik, Tillämpad kemi
Kompetenscentrum katalys
Anna Martinelli
Chalmers, Kemi och kemiteknik, Tillämpad kemi
Magnus Skoglundh
Chalmers, Kemi och kemiteknik, Tillämpad kemi
Kompetenscentrum katalys
Catalysis Today
0920-5861 (ISSN)
Vol. 369 123-128Ämneskategorier
Oorganisk kemi
Annan kemi
Organisk kemi
DOI
10.1016/j.cattod.2020.06.053