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Preparación y evaluación catalítica en hidrodesulfuración de nitruros mixtos de cobalto y vanadio usando carbonato de guanidina como acomplejante

Authors: Pfaff, Carolina; González, Douglas; Rico, Emily; Brito, Joaquín; Yraida Díaz;

Preparación y evaluación catalítica en hidrodesulfuración de nitruros mixtos de cobalto y vanadio usando carbonato de guanidina como acomplejante

Abstract

Se sintetizaron nitruros de vanadio y cobalto, a partir de Complejos Metal-Orgánicos por la interacción con carbonato de guanidina ([C(NH2)3]2CO3) por el método de Reacción a Temperatura Programada empleando 100mL/min de amoniaco o nitrógeno a 500-800°C; y posteriormente pasivados a temperatura ambiente con una mezcla oxígeno/argón (1% molar). Se caracterizaron por: Difracción de Rayos X, Análisis Químico Elemental, Microscopía Electrónica de Barrido y Área Específica, evidenciando formación de fases oxídicas, nitradas y sulfuradas de los metales, con mayor cristalinidad en aquellos preparados sin ligando. Finalmente, los sólidos fueron evaluados en la Hidrodesulfuración de tiofeno (350°C, 1atm); obteniendo conversiones cercanas al 100% con poca estabilidad para el CoV; mientras que los monometálicos fueron estables, favoreciéndose el uso de ligando con vanadio.

Vanadium and cobalt nitrides were synthesized, from Metal-Organic Complexes, with guanidine carbonate ([C(NH2)3]2CO3) by the Reaction to Programmed Temperature method using 100ml/min of ammonia or nitrogen at 500-800°C; and then it is passed to an ambient temperature with an oxygen/argon mixture (1% mol). It is characterized by: X-ray Diffraction, Elemental Chemical Analysis, Scanning Electron Microscopy and Specific Area, evidencing the formation of oxidic, nitrated and sulphided phases of metals, with high crystallinity in those prepared without ligand. Finally, the solids were evaluated in thiophene hydrodesulfurization (350°C, 1atm); obtaining conversions close to 100% with little stability for the CoV; While the monometallics were stable, we favored the use of ligand with vanadium.

{"references": ["1. S. Oyama, J. Schlatter, J.E. Metcalfe, J. Lambert. Industrial & Engineering Chemistry Research 27 (1988) 1639-1648 2. L. Volpe y M. Boudart, Catalysis Review Science Eng. 27 (1985) 515-538. 3. H. Topsoe y col., Hydrotreating Catalysts, Catalysis Science and Technology, vol. 11. New York, 1996. 4. Perry, Manual de Ingeniero Qu\u00edmico vol 2, Mc Graw Hill, 2001. 5. P. Afanasiev, Inorganic Chemistry 41 (2002) 5317-5319."]}

Keywords

Cobalt, vanadium, guanidine carbonate, hydrodesulfurization., Cobalto, Vanadio, Carbonato de Guanidina, Hidrodesulfuración.

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This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
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