NMR studies of hydrofluorocarbon-cation interactions and cation migrations on adsorption of hydrofluorocarbon-134 on zeolites NaY and CsY

Conference · Mon Dec 30 23:00:00 EST 1996

OSTI ID:462734

Grey, C P; Poshni, F I; Ba, Y ^[1]; Corbin, D R ^[2]

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1. State Univ. of New York, Stony Brook, NY (United States). Chemistry Dept.
2. DuPont Central Research and Development, Wilmington, DE (United States)

Unlike the syntheses of the CFC refrigerants and blowing agents, the syntheses of the more environmentally-friendly hydrofluorocarbons (HFCs) are more complex, and involve many more steps. Unwanted HFC/hydrochlorofluorocarbons (HCFCs) are often produced during the reactions and the purification of the products remains a concern. {sup 23}Na and {sup 23}Na/{sup 19}F double resonance MAS NMR methods have been used to study the binding of hydrofluorocarbon-134 (CF{sub 2}HCF{sub 2}H) in zeolites NaY and CsY. The interaction of HFC-134 with the sodium cations is so strong that the sodium cations in the sodalite cages (site I{prime}) migrate into the supercages to bind to the hydrofluorocarbon molecules.

• Sponsoring Organization: National Science Foundation, Washington, DC (United States)
• OSTI ID: 462734
• Report Number(s): CONF-960401--; ISBN 1-55899-334-7
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
ADSORPTION
CHLOROFLUOROCARBONS
MATERIAL SUBSTITUTION
NUCLEAR MAGNETIC RESONANCE
PURIFICATION
REFRIGERANTS
SEPARATION PROCESSES
SORPTIVE PROPERTIES
SYNTHESIS
ZEOLITES