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

ABSTRACT: 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

SUBMITTER: Liutkova A 

PROVIDER: S-EPMC10364136 | biostudies-literature | 2023 Jul

REPOSITORIES: biostudies-literature