Investigation of promoter effects of manganese oxide on carbon nanofiber-supported cobalt catalysts for Fischer–Tropsch synthesis

Bezemer, G. Leendert; Radstake, P.B.; Falke, U.; Oosterbeek, Heiko; Kuipers, Harmjan; Dillen, A.J. van; Jong, K.P. de

doi:10.1016/j.jcat.2005.10.031

Cited by 177 publications

(123 citation statements)

References 27 publications

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“…This proves the close interaction of the Co particles and MnO promoter. The lower IR absorption signal indicates a lower amount of CO adsorbed on the manganese promoted catalysts, probably due to blocking of part of the Co surface by MnO [21]. Moreover, next to the peak at 2,057 cm -1 , a second distinct peak of linearly bonded CO is observed at around 2,012 cm -1 region.…”

Section: Ir Spectroscopymentioning

confidence: 94%

“…This might be due to blocking of the cobalt surface by MnO [21]. Nevertheless, the beneficial effect of MnO is reflected in the increase in C 5?…”

Section: Ft Catalysismentioning

confidence: 99%

“…-selectivity values were found, however at a significant expense of the activity. This might be due to blockage of the cobalt surface [21] and/or a lower degree of reduction due to the reduction-retarding effect of MnO [16].…”

Section: Ft Catalysismentioning

confidence: 99%

“…-selectivity in the cobalt catalyzed FT reaction have been reported [11][12][13][14][15][16][17][18][19][20][21][22][23]. As an example, a study from Bezemer et al [21] showed an increase in C 5? -selectivity from 31 to 45 wt% for a cobalt on carbon nanofiber catalyst upon the addition of MnO at an Mn/Co atomic ratio of 0.03.…”

Section: Introductionmentioning

confidence: 99%

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A Highly Active and Selective Manganese Oxide Promoted Cobalt-on-Silica Fischer–Tropsch Catalyst

et al. 2011

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A highly active and selective manganese oxidepromoted silica-supported cobalt catalyst for the FischerTropsch reaction is reported. Co/MnO/SiO 2 catalysts were prepared via impregnation of a cobalt nitrate and manganese nitrate precursor, followed by drying and calcination in an NO/He flow. The catalysts were studied with STEM-EELS, infrared spectroscopy measurements of adsorbed CO and Steady-State Isotopic Transient Kinetic Analysis experiments. Based on those experiments, a relation between C 5? -selectivity and surface-coverages of CH xintermediates on cobalt was found.

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Section: Ir Spectroscopymentioning

confidence: 94%

“…This might be due to blocking of the cobalt surface by MnO [21]. Nevertheless, the beneficial effect of MnO is reflected in the increase in C 5?…”

Section: Ft Catalysismentioning

confidence: 99%

Section: Ft Catalysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A Highly Active and Selective Manganese Oxide Promoted Cobalt-on-Silica Fischer–Tropsch Catalyst

et al. 2011

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“…These include the hydrogenation of light alkenes [23][24][25][26][27], aldehydes [21,[28][29][30][31][32][33], polycyclic aromatic hydrocarbons [34], nitrobenzene [35], and cyclohexene [36]. They have also been used in alkene hydroformylation [37], vacuum residue hydroprocessing [38,39], ammonia and Fisher-Tropsch synthesis [40][41][42], cyclohexanol dehydrogenation [43], NO decomposition [44] and aniline oxidation [45,46]. However, CNFs have not been applied to bio-oil upgrading in supercritical water and more research is needed to develop suitable catalysts for this upgrading technology.…”

Section: Introductionmentioning

confidence: 99%

Bio-oil upgrading in supercritical water using Ni-Co catalysts supported on carbon nanofibres

Remón

Arauzo

García

et al. 2016

Fuel Processing Technology

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This work addresses the preparation, characterisation and screening of different Ni-Co catalysts supported on carbon nanofibres (CNFs) for use in the upgrading of bio-oil in supercritical water. The aim is to improve the physicochemical properties of bio-oil so that it can be used as a fuel. The CNFs were firstly oxidised in HNO 3 and afterwards subjected to a thermal treatment to selectively modify their surface chemistry prior to the incorporation of the metal active phase (Ni-Co). The CNFs and the supported catalysts were thoroughly characterised by several techniques, which allowed a relationship to be established between the catalyst properties and the upgrading results.The use of Ni-Co/CNFs for bio-oil upgrading in supercritical water (SCW) significantly improved the properties of the original feedstock. In addition, the thermal treatment to which the fibres were subjected exerted a significant influence on their catalyticproperties. An increase in the severity of the thermal treatment led to a substantial reduction in the oxygen content of the CNFs, mainly due to the removal of the less 2 stable oxygen surface groups, which allowed their surface polarity to decrease. This decrease resulted in less formation of solid products. However, it also reduced the H/C and increased the O/C ratios of the upgraded liquid. Therefore, a compromise between the yield and the properties of the upgraded bio-oil was achieved with a Ni-Co supported on a CNF with a moderate amount of oxygen surface groups.

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Carbon as Catalyst Support

Rodríguez‐Reinoso

Sepúlveda-Escribano

2008

Carbon Materials for Catalysis

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Investigation of promoter effects of manganese oxide on carbon nanofiber-supported cobalt catalysts for Fischer–Tropsch synthesis

Cited by 177 publications

References 27 publications

A Highly Active and Selective Manganese Oxide Promoted Cobalt-on-Silica Fischer–Tropsch Catalyst

A Highly Active and Selective Manganese Oxide Promoted Cobalt-on-Silica Fischer–Tropsch Catalyst

Bio-oil upgrading in supercritical water using Ni-Co catalysts supported on carbon nanofibres

Carbon as Catalyst Support

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