Mesoporous EU-1 zeolite synthesized in the presence of cationic polymer

Abstract

Mesoporous EU-1 zeolite (M-EU-1) is rationally synthesized from a starting aluminosilicate gel in the presence of small organic template (hexamethonium bromide, HMBr2) and mesoscale cationic polymer (polydiallyldimethylammonium chloride, PDADMAC). After characterizations of the EU-1 with by XRD, N2 sorption, SEM, TEM, NMR, and TG techniques, it is shown that the sample has good crystallinity, meso/microporosity, high BET surface area (442 m2/g), and large pore volume (0.28 cm3/g). Particularly, the mesoporosity in the M-EU-1 could be adjusted by the amount of mesoscale cationic polymer added in the starting gels. Catalytic tests in m-xylene isomerization show that the M-EU-1 is more stable than the conventional EU-1 synthesized in the absence of the mesoscale template.