Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.


Issue 24, 2020
Previous Article Next Article

Low-field NMR relaxation-exchange measurements for the study of gas admission in microporous solids

Author affiliations

Abstract

Understanding the uptake and storage of gases by microporous materials is important for our future energy security. As such, we demonstrate here the application of two-dimensional NMR relaxation experiments for probing the admission and corresponding exchange dynamics of methane within microporous zeolites. Specifically, we report low-field (12.7 MHz) 1H NMR relaxation-exchange correlation measurements of methane within commercial LTA zeolites (3A and 4A) at 25 and 35 bar and ambient temperature. Our results demonstrate the clear identification of bulk–pore and pore–pore exchange processes within zeolite 4A, facilitating the calculation and comparison of effective exchange rate dynamics across varying diffusion length scales and gas pressures. Additional data acquired for zeolite 3A reveals the sensitivity of NMR relaxation phenomena to size-exclusive gas admission phenomena, illustrating the potential of benchtop NMR protocols for material screening applications.

Graphical abstract: Low-field NMR relaxation-exchange measurements for the study of gas admission in microporous solids

Back to tab navigation

Supplementary files

Article information


Submitted
13 Apr 2020
Accepted
01 Jun 2020
First published
03 Jun 2020

Phys. Chem. Chem. Phys., 2020,22, 13689-13697
Article type
Paper

Low-field NMR relaxation-exchange measurements for the study of gas admission in microporous solids

N. Robinson, G. Xiao, P. R. J. Connolly, N. N. A. Ling, E. O. Fridjonsson, E. F. May and M. L. Johns, Phys. Chem. Chem. Phys., 2020, 22, 13689
DOI: 10.1039/D0CP02002H

Social activity

Search articles by author

Spotlight

Advertisements