Preparación y caracterización de la zeolita MCM-22 y de su precursor laminar

Abstract

The layered precursor of MCM-22 was prepared with different Si/Al ratios: 15, 25, 50, 100 and ∞. Upon heat treatment these precursors form MCM-22 zeolite. Both layered precursor and MCM-22 zeolite were characterized by several techniques: Chemical Analysis by Atomic Absorption Spectroscopy (AAS), X-Ray Diffraction (XRD), Thermo-gravimetric Analysis (TGA), Pore Analysis by N 2 and Ar adsorption, Scanning Electron Microscopy (SEM), Infrared Spectroscopy (IR) and Temperature Programmed Desorption of ammonium (TPD).