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In situ solid-state 1H NMR studies of hydration of the solid acid catalyst ZSM-5 in its ammonium form

Xu, Mingcan., Harris, Kenneth David MacLean and Thomas, John Meurig 2009. In situ solid-state 1H NMR studies of hydration of the solid acid catalyst ZSM-5 in its ammonium form. Solid State Nuclear Magnetic Resonance 35 (2) , pp. 93-99. 10.1016/j.ssnmr.2008.12.011

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Abstract

Hydration of the ammonium form of the solid acid catalyst ZSM-5 is investigated by applying a technique that has been developed recently for carrying out in situ solid-state NMR studies of adsorption processes. From 1H MAS NMR spectra recorded as a function of time and temperature during the hydration process, insights are established on the nature of the interaction between the adsorbed water molecules and the ammonium cations in the ZSM-5 material. The change in isotropic chemical shift for the ammonium cations is consistent with the formation of N–H⋯O hydrogen bonding with the water molecules. Studies of the adsorption of deuterated water, and dehydration of the hydrated material, are also reported.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Chemistry
Subjects: Q Science > QD Chemistry
Uncontrolled Keywords: Hydration; ZSM-5; In situ; Adsorption; Solid-state NMR
Publisher: Elsevier
ISSN: 0926-2040
Last Modified: 04 Jun 2017 01:56
URI: http://orca-mwe.cf.ac.uk/id/eprint/6175

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