مقاله Co–Ru/SiC impregnated with ethanol as an effective catalyst for the Fischer

خلاصه مقاله

Silicon carbide containing cobalt (30 wt.%) doped with 0.1 wt.% of ruthenium catalysts prepared by incipient wetness impregnation of cobalt nitrate with either ethanol or water were tested in the Fischer–Tropsch synthesis (FTS) in a fixed-bed configuration. The catalyst prepared with ethanol exhibits a higher FTS performance compared to the one prepared with water and especially at high reaction temperature, i.e. 230 °C. The FTS performance of the cobalt-based catalyst impregnated with ethanol further increases, under high temperature and high space velocity, to reach a steady state reaction rate of 0.54 gCH₂ gcatalyst⁻¹ h−1, and a relatively high C₅₊ selectivity of about 90%. In addition, the catalyst also exhibits a relatively high stability as a function of time on stream. ⁵⁹Co zero field NMR analysis has indicates that the proportion of cobalt atoms engaged in the small hcp cobalt particles (<8 nm) was higher for the ethanol impregnated catalyst and also to the more homogeneous dispersion of the ruthenium atoms within the cobalt network forming an alloy.

نویسندگان

Benoit de Tymowski [ Laboratoire des Matériaux, Surfaces et Procédés pour la Catalyse, CNRS-Université de Strasbourg (UdS), UMR 7515, 25, rue Becquerel, 67087 Strasbourg Cedex 08, France ]

Yuefeng Liu [ Laboratoire des Matériaux, Surfaces et Procédés pour la Catalyse, CNRS-Université de Strasbourg (UdS), UMR 7515, 25, rue Becquerel, 67087 Strasbourg Cedex 08, France ]

Christian Meny [ Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), CNRS-Université de Strasbourg (UdS), UMR 7504, 23, rue du Loess, 67037 Strasbourg Cedex 02, France ]

Christophe Lefèvre [ Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), CNRS-Université de Strasbourg (UdS), UMR 7504, 23, rue du Loess, 67037 Strasbourg Cedex 02, France ]

Cuong Pham-Huu [ Laboratoire des Matériaux, Surfaces et Procédés pour la Catalyse, CNRS-Université de Strasbourg (UdS), UMR 7515, 25, rue Becquerel, 67087 Strasbourg Cedex 08, France ]

کلمات کلیدی

Silicon carbide Cobalt Ruthenium Fischer–Tropsch synthesis Ethanol 59Co NMR Stacking faults

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مشاهده مقالات

2012 Applied Catalysis A: General

The scope of Applied Catalysis A: General includes the following:Scientific understanding of any catalytic phenomenon .Phenomena of relevance to current industrial processes, processes under industrial development or of interest for future commercial applications are particularly welcome. Heterogeneous, homogeneous and biocatalysts are included .Research investigating catalytic actions of heterogeneous, homogeneous, biological and natural systems are especially encouraged. Scientific aspects of preparation, activation, aging, deactivation, rejuvenation, regeneration and start up transient effects of commercially interesting or representative model catalysts. Scientific methods of characterization of catalysts, especially if they are applicable to industrial catalysts .Chemical engineering aspects relevant to an improved understanding of catalytic phenomena or application to catalysis. Results involving a joint approach by chemical engineering and catalytic science are particularly welcome. New catalysts, catalytic reactions, catalytic routes and processes of potential practical interest. Catalysis and catalytic processes for sustainable practices, including sustainable energy supply and consumption processes, and sustainable chemicals production.

حوزه های تحت پوشش : Petrochemical industry , Catalytic Science , chemical scientists in both industrial and academic fields