Resumen

SERRANO, Rosevelyn et al. Síntesis por carbonitruración térmica de nitruros refractarios: Parte 1: nitruro de vanadio. Rev. LatinAm. Metal. Mater. [online]. 2008, vol.28, n.2, pp.129-138. ISSN 0255-6952.

It has been synthesized vanadium nitride (VN) by carbothermal reduction of vanadium oxide (ex ammonium vanadate) and activated carbon mixtures in a N₂ atmosphere. The solution-derived precursor method used to mix NH₄VO₃ and C promoted the formation of submicrometer and morphologically uniform crystallites of VN at a lower temperature in comparison with conventional methods. The products were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and BET-surface area. In order to consider catalytic uses the synthesized product has been evaluated in the reaction of hydrodesulfuration of thiophene under atmospheric pressure and T = 400°C. It was found that the catalytic activity of the heat treated solids during 120 min. at 1100ºC was larger than those of VN powders obtained at shorter heat treatment times.

Palabras clave : Vanadium nitride (VN); Chemical synthesis; Thermal carbonitriding; Catalysis; Hydrodesulfurization.