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| Notation | Sample history |
|---|---|
| NH4Y | Commercial CBV300 as received |
| HY | CBV300 calcined (deammoniated and dehydrated) in vacuum |
| X-LaY | NH4Y exchanged with La(NO3)3 then heated to 550 °C |
| Y-1wk | HY or X-LaY exposed to ambient air for 1 week, then reheated to 450 °C |
