(19)FI NA-23 CROSS-POLARIZATION NMR-STUDY OF HYDROFLUOROCARBON-ZEOLITE BINDING ON ZEOLITE NAY/

Authors
LIM KH GREY GP
Citation
Kh. Lim et Gp. Grey, (19)FI NA-23 CROSS-POLARIZATION NMR-STUDY OF HYDROFLUOROCARBON-ZEOLITE BINDING ON ZEOLITE NAY/, Chemical communications, (20), 1998, pp. 2257-2258
Citations number
11
Categorie Soggetti
Chemistry
Journal title
Chemical communications → ACNP
ISSN journal
13597345
Issue
20
Year of publication
1998
Pages
2257 - 2258
Database
ISI
SICI code
1359-7345(1998):20<2257:(NCNOH>2.0.ZU;2-X
Abstract
F-19/Na-23 Cross polarization (CP) MAS NMR experiments of various asym metric hydrofluorocarbons (HFCs) such as CF3CFH2 (HFC-134a) and CF2HCF H2 (HFC-143) adsorbed on zeolite NaY, demonstrate that the hydrogen-co ntaining groups are bound more strongly to the zeolite framework, in t he order CF3 < < CF2H < CFH2; the results help explain the preferentia l binding of CF2HCF2H (HFC-134) over HFC-134a, and hence the effective ness of basic zeolites in the separation of HFC-134/134a gas mixtures.