Síntese de mordenita mesoporosa utilizando surfactante através do método de conversão assistida por vapor

Abstract

Mordenite samples were prepared by steam assisted conversion (SAC), by using different types of surfactants: (CTABr, Brij52, Brij58, F127, P123, SDS) as structure drivers for generating mesopores. For characterization of the produced samples were used the techniques of X ray diffraction (XRD), physical adsorption of N2 and temperature programmed desorption of ammonia (NH3-TPD). The results indicate that the samples using CTABr showed significant mesoporosity confirmed by the increased volume of mesopores determined by BJH, maintaining the structure of mordenite as confirmed by XRD and the micropore volume. The total acidity of all samples was maintained, except in the sample that was added large amount of CTABr in which there was loss in crystallinity. Furthermore, were evaluated in a catalytic cracking reaction of n-heptane at a temperature of 380 ° C, samples of mesoporous mordenite showed high catalytic activity and decreased deactivation rate for this reaction.