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Mechanism of Methanol‐to‐hydrocarbon Reaction over Zeolites: A solid‐state NMR Perspective

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The versatile methanol‐to‐hydrocarbon (MTH) process on acidic zeolites allows for a production of olefins, aromatics and gasoline from a wide range of non‐fossil resources. Elucidation of the MTH reaction mechanism… Click to show full abstract

The versatile methanol‐to‐hydrocarbon (MTH) process on acidic zeolites allows for a production of olefins, aromatics and gasoline from a wide range of non‐fossil resources. Elucidation of the MTH reaction mechanism is helpful to improve product selectivity as well as develop high performance catalysts. The application of solid‐state NMR in the investigation of MTH reaction has significantly contributed to get insight into the MTH chemistry. In this review, we summarize mechanistic insight that has been gained into the MTH reaction by using solid‐state NMR spectroscopy. Special emphasis is given to the observation and determination of C1 species and active intermediates particularly cyclic carbocations to uncover the exact reaction route for the initial C−C bond formation and the hydrocarbon pool mechanism. The detection of host‐guest interactions involved in the MTH reaction with the advanced 13C‐27Al double‐resonance NMR is discussed for a better understanding of the active sites and the reactivity of hydrocarbon pool species.

Keywords: solid state; mechanism; state nmr; hydrocarbon; reaction

Journal Title: ChemCatChem
Year Published: 2020

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