CO hydrogenation and methane activation over Pd–Co/SiO2 catalysts prepared by sol/gel method

Guczi, L.; Borkó, L.; Schay, Z.; Bazin, Dominique; Mizukami, Fujio

doi:10.1016/s0920-5861(00)00544-7

Cited by 46 publications

(14 citation statements)

References 15 publications

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“…[2][3][4] The doping of Co catalysts with metals such as Pd has resulted in improved performance in the conversion of methane to hydrocarbons [5] and CO hydrogenation. [6] A number of catalytic investigations [5][6][7] and model studies on CoPd nanoparticles grown on a flat alumina film [8][9][10][11] have investigated the promoting effect of Pd and it is proposed that the role of Pd is to enhance the adsorption of H 2 to facilitate the reduction of cobalt oxide forming the more active metallic phase.…”

Section: Accepted M Manuscriptmentioning

confidence: 99%

The influence of CO adsorption on the surface composition of cobalt/palladium alloys

et al. 2016

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Segregation induced by the adsorption of gas phase species can strongly influence the composition of bimetallic surfaces and can therefore play an important role in influencing heterogeneous catalytic reactions. The addition of palladium to cobalt catalysts has been shown to promote Fischer Tropsch catalysis. We investigate the adsorption of CO onto bimetallic CoPd surfaces on Pd{111} using a combination of reflection absorption infrared spectroscopy and medium energy ion scattering. The vibrational frequency of adsorbed CO provides crucial information on the adsorption sites adopted by CO and medium energy ion scattering probes the surface composition before and after CO exposure. We show that cobalt segregation is induced by CO adsorption and rationalise these observations in terms of the strength of adsorption of CO in various surface adsorption sites.

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Section: Accepted M Manuscriptmentioning

confidence: 99%

The influence of CO adsorption on the surface composition of cobalt/palladium alloys

et al. 2016

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“…More rapid hydrogen activation on cobalt FT catalysts would lead to higher reaction rate and higher fraction of saturated hydrocarbon. Guczi et al [71,72] suggested that in palladium promoted catalysts, palladium acted not only as a component which facilitated cobalt reduction, but it also provided additional sites for hydrogen activation.…”

Section: Hydrogen Activationmentioning

confidence: 99%

Promotion of Cobalt Fischer-Tropsch Catalysts with Noble Metals: a Review

Diehl¹,

Khodakov²

2008

Oil & Gas Science and Technology - Rev. IFP

167

109

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Résumé-Promotion par les métaux nobles de catalyseurs Fischer-Tropsch à base de cobalt : une revue -La synthèse Fischer-Tropsch est une part essentielle du procédé XTL (X-To-Liquids, avec X = Gaz, Biomasse ou Charbon) qui convertit du gaz de synthèse en hydrocarbures pour carburants propres. Les catalyseurs à base de cobalt supportés sur des oxydes inorganiques constituent le meilleur compromis pour la production de paraffines à longues chaînes carbonées et de cires. L'efficacité du procédé FischerTropsch dépend très fortement de la performance du catalyseur à base de cobalt. La promotion de ce catalyseur par des métaux précieux peut très fortement améliorer ses performances. Cet article fait la revue des différents effets des métaux nobles sur la structure et la performance de catalyseurs à base de cobalt. Les impacts sur le coût et l'activité des catalyseurs apparaissent comme des éléments incontournables dans le design de catalyseurs performants pour la synthèse Fischer-Tropsch. (X-To-Liquids, with X = Gas, Biomass or Coal) Abstract -Promotion of Cobalt Fischer-Tropsch Catalysts with Noble Metals: a Review -FischerTropsch synthesis is a major part of XTL

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“…It is reported by many researchers that Pd promoter enhances adsorption sites for H 2 on Co catalyst and thus increasing the hydrogenation rate in FT synthesis [14][15][16]. Guczi et al [17] showed that Pd as a promoter to Co/SiO 2 increased the relative fraction of alkanes in FT synthesis reaction. Many researchers utilized Pd to improve the performance of zeolite and FT synthesis hybrid catalysts for C 5 -C 11 iso-paraffins synthesis [18,19].…”

Section: Introductionmentioning

confidence: 99%

Fischer–Tropsch synthesis over Pd promoted cobalt based mesoporous supported catalyst

Gupta

Mahato

Gupta

et al. 2021

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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The present study focuses on the catalytic conversion of syngas (CO + H2) through Fischer–Tropsch (FT) route using two identically prepared 0.1 wt.% palladium promoted Mesoporous Alumina (MA) and SBA–15 supported Co (15 wt.%) catalysts. The Fischer–Tropsch activity is performed in a fixed bed tubular reactor at temperature 220 °C and pressure 30 bar with H2/CO ratio ~2 having Gas Hourly Space Velocity (GHSV) of 500 h−1. Detail characterizations of the catalysts are carried out using different analytical techniques like N2 adsorption-desorption, Temperature-programmed reduction with hydrogen (H2-TPR), Temperature-programmed desorption with NH3 (NH3-TPD), X-Ray Diffraction (XRD), and Transmission Electron Microscopy (TEM). The results show that the SBA–15 supported catalyst exhibits higher C6–C12 selectivity (57.5%), and MA supported catalyst facilitates the formation of higher hydrocarbons (C13–C20) having a selectivity of 46.7%. This study attributes the use of both the support materials for the production of liquid hydrocarbons through FT synthesis.

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CO hydrogenation and methane activation over Pd–Co/SiO2 catalysts prepared by sol/gel method

Cited by 46 publications

References 15 publications

The influence of CO adsorption on the surface composition of cobalt/palladium alloys

The influence of CO adsorption on the surface composition of cobalt/palladium alloys

Promotion of Cobalt Fischer-Tropsch Catalysts with Noble Metals: a Review

Fischer–Tropsch synthesis over Pd promoted cobalt based mesoporous supported catalyst

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