~(129)Xe NMR FOR DIFFUSION OF HYDROCARBONS IN ZEOLITES AND ~1H NMR IMAGING FOR COMPETITIVE DIFFUSION OF BINARY MIXTURES OF HYDROCARBONS IN ZEOLITES

摘要

Two NMR techniques have been developed to study the diffusion of hydrocarbons in zeolites. ~(129)Xe NMR of adsorbed xenon in which xenon is used to probe the concentration of a co-adsorbed hydrocarbon and ~1H NMR imaging which gives directly the concentration profile of a hydrocarbon in a zeolite along one or more directions.