Page 307 - Adsorbents fundamentals and applications

292 SORBENTS FOR APPLICATIONS

SII*

SII

SII’

SI’
SI’b

SI
SI’b
SI’

+

Figure 10.10. Extraframework sites for Ag in the faujasite structure. SI, SI ,and SIIare the
same as that shown in Figure 10.7. From Hutson et al. (2000a) with permission.
Table 10.3. Site occupancies for extra framework species in mixed Li,Ag-LSX in units of
silver/unit cell
Cation Li 95.8 Na 0.2 Li 54.0 Ag 41.8 Na 0.2 Li 93.3 Ag 2.0 Na 0.7 Li 93.3 Ag 2.0 Na 0.7
-LSX-450 -LSX-450 -LSX-350 -LSX-450

Li(I ) 27.2 23.4 28.5 29.3
Li(II) 33.9 40.3 34.9 34.9
Li(III) 32.4 — 23.0 25.3
Li found 93.5 63.7 86.4 89.5
Li predicted 95.8 54.0 93.3 93.3
Ag(I ) — 1.9 — —

Ag(II ) — — 1.7 0.9
Ag(II) — 2.0 — —
Ag(II*) — 1.7 — 0.9
Ag(III) — 5.1 — —
Ag(III ) — 17.9 — —

Ag Found — 28.6 1.7 1.8
Ag Predicted — 41.8 2.0 2.0
◦
450 and 350 indicate the temperature in C of treatment in vacuo; Hutson and Yang, 2000a, with
permission.