19Fi/23Na cross polarization NMR study of hydrofluorocarbon-zeolite binding on zeolite NaY

被引：16

作者：

Lim, KH ^{[1
]}

Grey, GP ^{[1
]}

机构：

[1] SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 USA

来源：

CHEMICAL COMMUNICATIONS | 1998年 / 20期

关键词：

D O I：

10.1039/a805542d

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

F-19/Na-23 Cross polarization (CP) MAS NMR experiments of various asymmetric hydrofluorocarbons (HFCs) such as CF3CFH2 (HFC-134a) and CF2HCFH2 (HFC-143) adsorbed on zeolite NaY, demonstrate that the hydrogen-containing groups are bound more strongly to the zeolite framework, in the order CF3 < < CF2H < CFH2; the results help explain the preferential binding of CF2HCF2H (HFC-134) over HFC-134a, and hence the effectiveness of basic zeolites in the separation of HFC-134/134a gas mixtures.

引用

页码：2257 / 2258

页数：2

共 11 条

[1]

CORBIN DR, 1995, Patent No. 5600040

[2] Combined MAS NMR and X-ray powder diffraction structural characterization of hydrofluorocarbon-134 adsorbed on zeolite NaY: Observation of cation migration and strong sorbate-cation interactions [J].