Zeolite LiNaX

Table I. Henry Constant, Ki, for Xenon Adsorption on Zeolite LiNaX-1 at —45°C (Mmole/G. Torr)...

The paramagnetic effects of oxygen molecules on the sodium cations in zeolite LiNaX (approximate to 70% Li 30% Na) have been investigated using VT Na MAS NMR and Na MQ MAS NMR. 23 jyjg been used to calculate the isotropic chemical shifts, quadrupolar shifts, and the quadrupolar coupling constants. 

Multinuclear solid state nuclear magnetic resonance (NMR) has been applied to study the interaction of pyrrole with extra framework compensating cations in zeolites LiNaY and LiNaX. Upon adsorption over zeolite LiNaY, Na and Li cations migrate towards accessible positions in the supercage to interact with one molecule of pyrrole. The adsorption over zeolite LiNaX decreases the mobility of SIIT Na cations, while pyrrole molecules do not interact with Li" cations. At lower loading, pyrrole adsorbs over more basic sites, which are associated with Na cations in zeolite LiNaY. 

By using the first three or four coefficients, Avgul et a/.(1973) were able to satisfactorily apply Equation (11.2) up to 70-80% of the total filling of zeolites NaX and LiNaX by Ar and Xe. 

Figure 1. Isotherm of xenon adsorption on LiNaX-1 zeolite...

Figure 2. Dependence of (a) constant and (b) zero coverage heat of adsorption Q, on exchange cation radius in type X zeolite for the adsorption of ethane (open circles) and ethylene (filled circles). The and values for LiNaX-1 zeolite are indicated as triangles.

Figure 3. Dependence of the heat of CO adsorption on the adsorption amount for LiNaX zeolites with different exchange cation concentrations (indicated)...

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