2.2.2. Synthesis of mesoporous mordenite
The Na-Mor sample was refluxed with a solution of 2 M HNO3 at
373 K for 2 h with a liquid-to-solid ratio of 20 ml/g. Then, the solid
sample was filtered, washed with deionized water, and dried at
393 K for 12 h. The obtained sample was treated with a solution of
0.2 M NaOH with a liquid-to-solid ratio of 20 ml/g at 343 K for 2 h.
The product was filtered, washed with deionized water, dried and
then calcined at 823 K for 3 h. The sample was called Na-M-Mor.
The Na-M-Mor sample was then ion-exchanged thrice with a solution
of 1 M NH4NO3 at 353 K for 1 h, followed by calcination at 823 K for
3 h to obtain H-form mesoporous mordenite labeled as H-M-Mor.
2.2.3. Synthesis of iron-containing mesoporous mordenite
The Na-M-Mor sample was ion-exchanged thrice with a solution of
0.05 M FeCl2 with a solid-to-liquid ratio of 100 ml/g at room temperature
for 2 h. The product was filtered, washed with deionized water,
dried at 393 K for 12 h, and then calcined at 823 K for 3 h. The obtained
sample was labeled as Fe-M-Mor. For comparison, iron-containing
mordenite labeled as Fe-Mor was prepared as described above by
ion-exchange based on the Na-Mor sample.