Role of Strontium Cations in ZSM-5 Zeolite in the Methanol-to-Hydrocarbons Reaction

Anna Liutkova, Victor Drozhzhin, J.M.J.J. Heinrichs, Valentin Jestl, Angelina Evtushkova, Brahim Mezari, Alvaro Mayoral, Nikolay A. Kosinov (Corresponding author), Emiel J.M. Hensen (Corresponding author)

Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

2 Citaten (Scopus)
37 Downloads (Pure)

Samenvatting

The selectivity of the methanol-to-hydrocarbons (MTH) reaction can be tuned by modifying zeolite catalysts with alkaline earth metals, which typically increase propylene selectivity and catalyst stability. Here we employed Sr2+ as its higher atomic number in comparison to the zeolite T atoms facilitates characterization by scanning transmission electron microscopy and operando X-ray absorption spectroscopy. Sr2+ dispersed in the ZSM-5 micropores coordinates water, methanol, and dimethyl ether during the MTH reaction. Complementary characterization with nuclear magnetic resonance spectroscopy, thermogravimetric analysis combined with mass spectrometry, operando infrared spectroscopy, and X-ray diffraction points to the retention of substantially more adsorbates during the MTH reaction in comparison to Sr-free zeolites. Our findings support the notion that alkaline earth metals modify the porous reaction environment such that the olefin cycle is favored over the aromatic cycle in the MTH, explaining the increased propylene yield and lower deactivation rate.
Originele taal-2Engels
Pagina's (van-tot)6506-6512
Aantal pagina's7
TijdschriftJournal of Physical Chemistry Letters
Volume14
Nummer van het tijdschrift28
DOI's
StatusGepubliceerd - 20 jul. 2023

Financiering

Petra III Funding numbers: AV-2021024881

FinanciersFinanciernummer
Shanghai Key-Laboratory of HREM21DZ2260400
European Union’s Horizon Europe research and innovation programme
H2020 Marie Skłodowska-Curie Actions801359, 823717-ESTEEM3
European Synchrotron Radiation FacilityCH6231
National Natural Science Foundation of ChinaNSFC-21835002, EM02161943
Ministerie van OCW
Nederlandse Organisatie voor Wetenschappelijk Onderzoek
Ministerio de Ciencia e InnovaciónDGA E13_20R, RYC2018-024561-I
Helmholtz Association
ShanghaiTech University

    Vingerafdruk

    Duik in de onderzoeksthema's van 'Role of Strontium Cations in ZSM-5 Zeolite in the Methanol-to-Hydrocarbons Reaction'. Samen vormen ze een unieke vingerafdruk.

    Citeer dit