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Nanolayered ZSM-5 zeolites were synthesized at high framework Al content. Crystallization of ZSM-5 zeolite synthesis gel at Si/Al ratio of 20 at 423K using C22H45–N+(CH3)2–C6H12–N+(CH3)2–R (R=hexyl or propyl) as structure-directing agents resulted in amorphous product. When the hydrothermal synthesis was carried out at 443K instead of 423K, crystalline nanolayered ZSM-5 zeolites were obtained. By...
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