Formation and Reactivity of Surface Methoxy Species in Methanol Conversion over SSZ-13 Zeolite

doi:10.11938/cjmr20222983

Abstract

Abstract:

The formation and reactivity of surface methoxy species in methanol reaction over SSZ-13 zeolite were investigated by using solid-state nuclear magnetic resonance (NMR) technique. The surface methoxy species bound to Brønsted acid sites was identified by two-dimensional ¹³C-²⁷Al heteronuclear multiple quantum coherence (HMQC) NMR experiment. The formation of another surface methoxy species bound to Lewis acid sites was also observed. The combination of ¹³C NMR and gas chromatography-mass spectrometry (GC-MS) showed that the two kinds of surface methoxy species possess high reactivity, contributing to the formation of hydrocarbon pool species and hydrocarbons via the hydrocarbon pool mechanism.

Key words: SSZ-13 zeolite, solid-state nuclear magnetic resonance, methanol conversion, surface species, reaction mechanism

CLC Number:

O482.53

Rui QIN,Chao WANG,Qiang WANG,Min HU,Jin-lin LI,Jun XU,Feng DENG. Formation and Reactivity of Surface Methoxy Species in Methanol Conversion over SSZ-13 Zeolite[J]. Chinese Journal of Magnetic Resonance, 2022, 39(4): 439-447.

Figures/Tables 4

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