29-P-21-Synthesis and characterization of highly ordered mono- and bimetallic substituted MCM-41 molecular sieves and their catalytic properties in selective oxidation of hydrocarbons

Publisher Summary This chapter discusses the synthesis and characterization of highly ordered mono- and bimetallic substituted MCM-41 molecular sieves and their catalytic properties in a selective oxidation of hydrocarbons. The mono- and bimetallic substituted MCM-41 catalysts with cobalt, vanadium, or lanthanum have been prepared by direct synthesis or impregnation and characterized by various techniques, such as X-ray diffraction (XRD), N 2 adsorption–desorption, scanning electron microscopy (SEM), transmission electron microscopy (TEM), and thermogravimetric analysis (TGA). The catalytic activity in the selective oxidation of styrene with hydrogen peroxide (H 2 O 2 ) has been evaluated. Adsorption of benzene and ammonia on the mono- and bimetallic mesoporous molecular sieves with cobalt and vanadium has been studied by infrared (IR) spectroscopy, and the results have been correlated with their catalytic properties and the characteristics of the structure. Co-incorporated catalysts prepared by direct synthesis show to be very active and selective.