Abstract

COHA-VESGA, P. M.; ROJAS-ARIAS, N.  and  VALENCA, G. P.. Selective oxidation of ethanol into acetaldehyde catalyzed by a novel Mg-Mo/MCM-41 mesoporous molecular sieves. J. appl. res. technol [online]. 2022, vol.20, n.1, pp.24-36.  Epub May 30, 2022. ISSN 2448-6736.  https://doi.org/10.22201/icat.24486736e.2022.20.1.1482.

MCM-41 mesoporous molecular sieves impregnated with MgO, MoO3, and Mo2C were synthesized using a wet impregnation method. The compounds developed herein, were characterized by means of XRD, SEM-EDS and FT-IR techniques. The production capacity of acetaldehyde from ethanol was analyzed by catalytic processes employing as-synthesized MCM-41. The obtained results show that the changes in crystallinity of MCM-41 were generated by the impregnation of oxides, which generate damage to the structure of MCM-41. Nevertheless, the characteristics of the compounds show a favorable reactivity behavior, allowing them to be used as heterogeneous catalyst material due to the similarity of the characteristics between MCM-41 with and without Mg and Mo oxides. The catalytic tests show the influence between the type of catalyst used and the temperature applied to the selective process of acetaldehyde from ethanol, obtaining the best results in the samples impregnated with Mo2C at 250 °C, with a production percentage of acetaldehyde of 80.7% and 77.9% for the catalysts impregnated with 0.5% and 2.0% Mg and 3.0% Mo carbide, respectively.

Keywords : MCM-41 mesoporous molecular sieve; ethanol; catalytic process; acetaldehyde.