Acceso usuarios
Flávia F. Almaraz, Zilacleide da Silva Barros Sousa, Fátima M. Z. Zotin, Cristiane Assumpção Henriques
Currently, most of the global methanol is derived from reforming syngas obtained from natural gas. However, thermochemical processes like gasification and pyrolysis, which use biomass as a feedstock for syngas production, are increasingly promising for producing methanol from renewable sources. The conversion of methanol into light olefins, catalyzed by zeolites with different acid and structural characteristics, such as HZSM-5, HFER, SAPO-34, and HMCM-22, was studied. The physicochemical characterization of the samples was carried out using XRF, XRD, nitrogen physisorption, SEM, IR spectrometry with pyridine adsorption, and temperature programmed desorption of NH3 (TPD NH3). The catalyst performances were compared under the same initial conditions with an isoconversion of 75 ± 5%. The acid and structural characteristics exerted a strong influence on the catalytic performance in terms of activity, stability, and selectivity for the reaction products.
