Synthesis and Pore Structure of Mesozeolite FAU

Mesoporous zeolites X and Y with FAU structure were hydrothermally synthesized using an organosilane surfactant (TPOAC) as mesopore-generating agent, which was added into the conventional synthesis system of the crystalline microporous aluminosilicates. X-ray diffraction, scanning electron microscope, high-resolution transmission electron microscope, N 2 adsorption-desorption isotherms and thermogravimetric analysis were used to characterize their structural and textural features. The results showed that the presence of TPOAC led to nanoscale zeolite crystals and abundant intracrystal mesopores at diameter of 5~6 nm, forming the meso-zeolites X and Y with micropores, intra-and inter-mesopores. Both mesoporous zeolite X and Y displayed not only inherent topological and microporous structure of zeolite FAU, but also different morphology from conventional zeolite FAU crystals.