STUDY ON THE INFLUENCE OF THE METAL CATION INCORPORATION IN THE

CLARA SAUX, MARÍA S. RENZINI, PAULA G. BERCOFF, HÉCTOR R. BERTORELLO Y LILIANA B. PIERELLA

Avances en ciencias e ingenierias

Executive Business School

Lugar: La Serena ; Año: 2011 vol. 2 p. 1 - 10

0718-8706

ZSM-5 zeolites with Si/Al molar ratio of 17 were synthesized by hydrothermal method. Afterwards, cobalt and chromium were incorporated via wet impregnation in a 3 metal wt %. According with X ray diffraction patterns,matrix structure and cristallinity are not affected by transition metals incorporation. Even though, Co3O4 and Cr2O3 species are detected for Co-ZSM-5 and Cr-ZSM-5 samples, respectively. Room temperature magnetization measures showed transition metal effect over diamagnetic zeolite matrix behavior with the appearance of hysteresis cycles which do not saturate due to a paramagnetic component. Both materials were evaluated as catalysts for styrene selective oxidation with hydrogen peroxide showing good results in terms of activity with high selectivity values (over 70 mol%) towards benzaldehyde.3O4 and Cr2O3 species are detected for Co-ZSM-5 and Cr-ZSM-5 samples, respectively. Room temperature magnetization measures showed transition metal effect over diamagnetic zeolite matrix behavior with the appearance of hysteresis cycles which do not saturate due to a paramagnetic component. Both materials were evaluated as catalysts for styrene selective oxidation with hydrogen peroxide showing good results in terms of activity with high selectivity values (over 70 mol%) towards benzaldehyde.