Hydrocarbon synthesis from carbon monoxide + hydrogen on impregnated cobalt catalysts

Rathouský, Jiřı́; Zukal, Arnošt; Лапидус, А. Л.; Krylova, A. Yu.

doi:10.1016/0926-860x(91)80003-h

Cited by 36 publications

(8 citation statements)

References 58 publications

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“…In a previous study, Rathousky et al stated that the metallic cobalt formed on the outer surface of the CoO crystal-lines enhances the adsorption centers of weakly bonded carbon monoxide molecules [27]. Later, Enache et al [28] confirmed these findings as they observed that the catalytic activity of the cobalt catalyst is improved when an Fig.…”

Section: Stability Of the Cobalt Catalyst Activity And Structure Aftementioning

confidence: 82%

Impact of cobalt-based catalyst characteristics on the performance of conventional gas-phase and supercritical-phase Fischer–Tropsch synthesis

Elbashir

Dutta

Manivannan

et al. 2005

Applied Catalysis A: General

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Section: Stability Of the Cobalt Catalyst Activity And Structure Aftementioning

confidence: 82%

Impact of cobalt-based catalyst characteristics on the performance of conventional gas-phase and supercritical-phase Fischer–Tropsch synthesis

Elbashir

Dutta

Manivannan

et al. 2005

Applied Catalysis A: General

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“…As it was recently shown [8,9], the physicochemical properties of catalyst, such as, Supported metal/BEA zeolite catalysts were investigated in FT reaction due to the presence of acidic sites, which can increase the activity and selectivity of catalysts in CO hydrogenation [10,11]. The modification of BEA zeolite by dealumination followed by the introduction of transition metals can improve the activity of cobalt zeolite catalysts in Fischer-Tropsch synthesis and enable the selective production of liquid hydrocarbons.…”

Section: Introductionmentioning

confidence: 99%

The remarkable effect of the preparation procedure on the catalytic activity of CoBEA zeolites in the Fischer–Tropsch synthesis

Chałupka

Casale

Żurawicz

et al. 2015

Microporous and Mesoporous Materials

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The remarkable effect of the preparation procedure on the catalytic activity of CoBEA zeolites in the Fischer-Tropsch Synthesis. Microporous and Mesoporous Materials, Elsevier, 2015, 211, pp.9-18. AbstractThis work deals with the investigation of the influence of the preparation procedure and Co content on the activity of CoBEA zeolite in Fischer -Tropsch synthesis. For this purpose the Co-containing zeolites were prepared by a conventional wet impregnation (Co x AlBEA series) and a two-step postsynthesis method (Co x SiBEA series). Calcination at 500 °C, for 3h in air and then reduction at 500 °C in flow of 95 % H 2 -5 % Ar stream of as prepared Co x AlBEA and Co x SiBEA zeolites led to obtain Red-C-Co x AlBEA and Red-C-Co x SiBEA catalysts with different properties in Fischer -Tropsch reaction. The most active catalysts were Red-C-Co 10 SiBEA and Red-C-Co 20 SiBEA with high CO conversion of 90 -95 % and selectivity towards liquid products of 85 % containing C 7 -C 18 n-alkanes, isoalkanes and small amount of olefins. In the case of Red-C-Co x AlBEA catalysts the CO conversion was of 68 % and selectivity towards liquid products of 57 %. The identified liquid products were mainly C 7 -C 16 n-alkanes. Moreover, Red-C-Co x SiBEA catalysts demonstrated better stability and resistance to coke formation than Red-C-Co x AlBEA ones. It is probably related to higher dispersion of cobalt nanoparticles in Red-C-Co x SiBEA than in Red-C-Co x AlBEA catalysts and absence of strong Brønsted acidic sites in the former after removal of aluminium in the first step of two-step postsynthesis preparation procedure.

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“…The TPR profiles of the catalysts calcined above 220°C basically exhibit two reduction maxima in the temperature regions of 200-250 and 350-450°C, respectively. The cobalt oxide reduction occurs either by reduction of a single cobalt phase in a two-step mechanism or reduction of two phases with different reducibility [15][16][17][18][19][20]. Based on the present data it is difficult to point out in which way it occurs.…”

Section: Reducibility and Measurement Of Cobaltmentioning

confidence: 65%

“…A number of studies have been reported highlighting the effect of pretreatment conditions on the activity and selectivity of the catalysts [15][16][17][18][19][20]. According to the reports of Goodwin Jr. et al [16] and Calleja et al [17], the calcination or reduction temperature has a negligible effect on the catalytic activity.…”

Section: Introductionmentioning

confidence: 95%

See 1 more Smart Citation

Effect of Calcination Temperature on the Activity and Cobalt Crystallite Size of Fischer–Tropsch Co–Ru–Zr/SiO2 Catalyst

et al. 2009

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A series of Co-Ru-Zr/SiO 2 catalysts were prepared by the co-impregnation method in order to understand the effects of calcination temperature on their activity and stability. The crystallite size of cobalt obtained from H 2 chemisorption decreased up to a calcination temperature of 300°C and then increased to reach a reasonably constant value. The activity for CO hydrogenation also increased upto this temperature and then decreased to be stabilized finally at a value smaller than the optimum one. The turn-over frequency values are not significantly altered on the catalysts calcined above 220°C. It was observed that in the presence of chlorine released during the decomposition of the zirconium oxychloride precursor, the dispersion of cobalt crystallites was altered due to the different environment of chlorine and water evolved during the reduction step.

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Hydrocarbon synthesis from carbon monoxide + hydrogen on impregnated cobalt catalysts

Cited by 36 publications

References 58 publications

Impact of cobalt-based catalyst characteristics on the performance of conventional gas-phase and supercritical-phase Fischer–Tropsch synthesis

Impact of cobalt-based catalyst characteristics on the performance of conventional gas-phase and supercritical-phase Fischer–Tropsch synthesis

The remarkable effect of the preparation procedure on the catalytic activity of CoBEA zeolites in the Fischer–Tropsch synthesis

Effect of Calcination Temperature on the Activity and Cobalt Crystallite Size of Fischer–Tropsch Co–Ru–Zr/SiO2 Catalyst

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