Investigation of the Ethanol Dehydration to Ethene Reaction on H-SSZ-13 Molecular Sieve by in situ Solid-state NMR Spectroscopy

doi:10.11938/cjmr20212946

Abstract

Abstract:

In situ solid-state nuclear magnetic resonance (ssNMR) techniques under continuous flow and batch-like conditions as well as 2D ¹³C-¹³C dipolar-based COmbined R2 Driven (CORD) spin diffusion NMR experiments were utilized to investigate the dehydration process of ethanol on molecular sieve H-SSZ-13. Kinds of intermediate species including ethanol with different adsorption orientation, diethyl ether under activated state, the surface ethoxy, triethyloxonium ion and even ethene were captured directly, and the evolution process of these intermediate species was also revealed in this paper. Moreover, it can be emphasized that the ethene species were observed in situ by ssNMR for the first time. These results enriched the fundamental research of ethanol dehydration reaction.

Key words: in situ solid-state nuclear magnetic resonance, ethanol dehydration, zeolite catalysis

CLC Number:

O482.53

Shu ZENG, Shu-tao XU, Ying-xu WEI, Zhong-min LIU. Investigation of the Ethanol Dehydration to Ethene Reaction on H-SSZ-13 Molecular Sieve by in situ Solid-state NMR Spectroscopy[J]. Chinese Journal of Magnetic Resonance, 2022, 39(2): 123-132.

Figures/Tables 7

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