Catalysis Letters, Vol.48, No.3-4, 239-245, 1997
The modification of molybdenum nitrides : the effect of the second metal component
A set of Mo2N-based bimetallic catalysts with high surface area around 140 m(2)/g have been successfully prepared from precursors obtained using the coprecipitation method. Both the precursors and the end-catalysts were characterized using scanning electron microscopy (SEM) and X-ray diffraction (XRD). The nitriding processes were monitored by differential thermal analysis (TDA). The catalytic properties of Co-Mo bimetallic catalyst under medium pressure (3.0 MPa) are much better for the hydradenitrogenation of pyridine than those of pure gamma-Mo2N and a commercially used sulfided CoMo/Al2O3 catalyst. The introduction of the second metal component has been shown to disrupt the morphology of the nitride phase with a greater concentration of (111) planes being present compared to (200) planes, a situation that is reversed compared to gamma-Mo2N.
Keywords:REACTION PATHWAYS;SURFACE OXYGEN;CARBIDES;CATALYSTS;HYDRODENITROGENATION;HYDRODESULFURIZATION;HYDROGENATION;TUNGSTEN;MO2N;AREA