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      Efecto del Potasio en Catalizadores CoMo/g-Al2O3-K(x) sobre el Hidrotratamiento de Naftas Translated title: Effect of Potassium in CoMo/g-Al2O3-K(x) Catalysts on Naphtha Hydrotreating

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          Abstract

          Se prepararon catalizadores CoMo soportados en g-Al2O3 modificada con potasio (K, 1, 3 y 5% en masa) y se evaluaron en reacciones simultáneas de hidrodesulfuración (HDS) de 2-metiltiofeno e hidrogenación de olefinas (trimetil-1-penteno y trimetil-2-penteno). Las propiedades ácido-base de los catalizadores se determinaron utilizando desorción de amoniaco con temperatura programada (TPD) y la reacción de descomposición de 2-propanol. El área superficial BET y la acidez de los catalizadores CoMo/g-Al2O3-K(x) disminuyeron con el incremento en el contenido de K, mientras que la selectividad hidrodesulfuración/hidrogenación de olefinas internas (HDS/HID) aumentó. Sin embargo, la actividad de los catalizadores disminuyó en todas las reacciones. La comparación con la literatura permitió establecer que las modificaciones en la estructura y dispersión de la fase activa provocadas por la introducción del potasio no son las causantes de la disminución en la actividad.

          Translated abstract

          CoMo catalysts supported on g-Al2O3 modified with potassium (K, 1, 3 and 5 wt%) were prepared and evaluated in simultaneous hydrodesulfurization (HDS) of 2-methyltiophene and hydrogenation of olefins (trimethyl-1-pentene to trimethyl-2-pentene ratio) reactions. The acid-base properties of the catalysts were measured by ammonia temperature-programmed desorption (TPD) and by the decomposition reaction of 2-propanol. Results showed that the BET surface area and the acidity of catalysts modified with potassium decreased when the potassium concentration increased as long as hydrodesulfurization/ hidrogenation (HDS/HYD of internal olefins increased. However, the activity of the modified catalysts decreased for all reactions. Comparison with literature information allowed establishing that modifications in the structure and dispersion of the active phase caused by the introduction of potassium are not the responsible for the activity decrease.

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          Catalytic Aluminas: Surface Models and Characterization of Surface Sites

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            An overview of new approaches to deep desulfurization for ultra-clean gasoline, diesel fuel and jet fuel

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              On the hydrodesulfurization of FCC gasoline: a review

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                Author and article information

                Journal
                infotec
                Información tecnológica
                Inf. tecnol.
                Centro de Información Tecnológica (La Serena, , Chile )
                0718-0764
                2009
                : 20
                : 6
                : 11-20
                Affiliations
                [01] Bucaramanga orgnameUniversidad Industrial de Santander orgdiv1Escuela de Ingeniería Química orgdiv2Centro de Investigaciones en Catálisis (CICAT) Colombia acenteno@ 123456uis.edu.co
                Article
                S0718-07642009000600003 S0718-0764(09)02000603
                10.4067/S0718-07642009000600003
                f6e002e8-9620-4043-8976-9044f2008f56

                This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

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                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 27, Pages: 10
                Product

                SciELO Chile

                Categories
                Catálisis

                propiedades ácido-base,potasio,catalizadores Co-Mo,hidrogenación de olefinas,hidrodesulfuración,acid-base properties,potassium,Co-Mo catalysts,olefins hydrogenation,hydrodesulphurization

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