Síntesis de catalizadores Co-Mo en varios soportes.

Abstract

Gamma alumina has been widely used as a catalyst support, adsorbent and ion exchanger due to its textural and catalytic properties, which can be adjusted by varying the synthesis parameters such as the hydrothermal treatment temperature. The decrease of the textural properties of gamma alumina when using structure-directing agents (SDA) during its synthesis has been widely reported, which has a significant impact on the catalytic active species. In the following work, a cobalt and molybdenum catalyst supported on gamma alumina was synthesized. In order to do the synthesis, first, three supports were synthesized via sol-gel in the absence of SDA at hydrothermal treatment temperatures (HT) of 45℃, 65℃ and 85℃, out of the three supports one was selected to be impregnated with Co and Mo. The results obtained suggest that the increase in HT temperature causes an increase in the internal order of the gamma alumina unit cell, which favored obtaining a catalyst with compact spheroidal morphology, a Mo density of 3.67 atMo/nm2, a specific surface area of 225.30 m2/g, a pore volume of 0.64 cm3/g, and a pore diameter of 7.12 nm, this results did not vary significantly compared to the original support and fitted the values recommended by literature, according to this, active catalytic species were obtained.