Resumo

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.

Palavras-chave : Vanadium nitride (VN); Chemical synthesis; Thermal carbonitriding; Catalysis; Hydrodesulfurization.