Generación de mesoporosidad en zeolitas ZSM-11, BETA e Y por tratamiento alcalino

ABSTRACT Zeolites, Y, ZSM-11 and BETA, widely used in refineries and petrochemical processes, fine chemistry and environmental processes were subjected to an alkaline treatment of desilication, in order to generate mesoporosity in the structure. The process used consisted of treating samples with an aqueous solution of NaOH at 65 ° C for 30 minutes. An exchange with NH4Cl, to recover the acidity, followed by desorption in a N2 stream and subsequent calcination at 500 ° C was then performed. The treated samples were evaluated by various techniques such as XRD, ICP, SEM, and surface area deter...