Molecular Structures and Reactivity of Supported Molybdenum Oxide Catalysts

The Synthesis and Evaluation of Up-scalable Molybdenum Based Ultra Dispersed Catalysts: Effect of Temperature on Particle Size

“…Molybdenum (Mo) based catalysts have been widely used in the petroleum industry for the hydroprocessing of heavy oil fractions [2]. Typically, commercial hydroprocessing catalysts are supported on alumina and used in a fixed or ebullated bed reactor.…”

CoMo/Al2O3 catalysts prepared on the basis of Co2Mo10-heteropolyacid and cobalt citrate: Effect of Co/Mo ratio

“…All Co x ACo 2 Mo 10 HPA/Al 2 O 3 catalysts showed the main peak at around 945-951 cm À1 in the Raman spectra, this has been ascribed to symmetric stretching of Mo@O bond in polymolybdate entities [34,35]. Such Mo oxide species have been believed to interact with a support weakly, resulting in higher reducibility and activity in HDS reaction [34][35][36][37][38]. Increase of cobalt content in the catalysts leads to shifting the broad line from 953 to 945 cm À1 that occurs probably due to interaction of molybdenum species with cobalt citrate complexes.…”

Stability of supported and promoted-molybdenum carbide catalysts in dry-methane reforming

“…In addition to surface area, the higher activities of the Mo 2 C/gAl 2 O 3 catalysts could also be correlated to the known strong interactions between MoO 3 and Al 2 O 3 to form molybdena monolayers, and the spontaneous spreading of MoO 3 on Al 2 O 3 [25], both of which are favorable for keeping the active metal in a higher dispersion state. While the latter phenomena are also true for Mo 2 C/MgO [26], the thermal stability of MgO is much lower than that of g-Al 2 O 3 .…”