Iron alloy Fischer-Tropsch catalysts IV. Reaction and selectivity studies of the FeCo system

Arcuri, Kym B.; Schwartz, L. H.; Piotrowski, Rafał; Butt, John

doi:10.1016/0021-9517(84)90224-0

Cited by 56 publications

(16 citation statements)

References 14 publications

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“…In line with other reports (Butt et al 1982;Arcuri et al 1984) and theoretical predictions based on a shift to lower basicity, the activity of catalyst C-FeCo is markedly higher than that of catalyst C-Fe (Figure 3). After an initial maximum of ca.…”

Section: Unsupported Catalystssupporting

confidence: 92%

“…A typical hydrocarbon product distribution, obtained at time on stream t = 100 ks with the five different catalysts is shown in Figure 1. As may be expected from a basicity THE CANADIAN JOURNAL OF CHEMICAL ENGINEERING, VOLUME 67, DECEMBER, 1989 effect involving a shift to higher work function values (lower basicity) on alloying iron with cobalt, catalyst C-FeCo has a markedly lighter product than catalyst C-Fe, in line with data reported in the literature (Butt et al 1982;Arcuri et al 1984). When metal oxides which cannot be fully reduced under synthesis conditions are incorporated in the catalyst, support effects involving demetallization are expected (Snel, 1986~).…”

Section: Unsupported Catalystssupporting

confidence: 85%

“…Much of the available data was obtained at total pressures of 100 kPa and at low conversion levels. Studies conducted under more realistic conditions (Butt et al, 1982;Arcuri et al, 1984) indicate an enhanced selectivity for the formation of small olefins (an increase in both the mass and function selectivity in the product of the alloy relative to that of the pure components) at atmospheric pressure, which is not maintained at higher pressures (1.4 MPa). A comparison of the product distributions obtained at low and high pressure indicates that at higher pressures the yield distributions are similar to those obtained with iron, but the overall activity is comparable to that normally observed with cobalt catalysts.…”

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confidence: 99%

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Catalytic hydrogenation of carbon monoxide to alkenes over partially degraded iron‐cobalt complexes

Snel

1989

Can J Chem Eng

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Complex‐derived iron–cobalt alloy catalysts have been studied under conditions similar to those normally prevailing in industry. Despite reports in the literature indicating unusual selectivities with iron–cobalt alloy catalysts under atmospheric pressure conditions, no deviations from normal selectivity behaviour have been observed when studied under steady‐state conditions and pressures of 2.0 MPa. However, when promoted with manganous oxide or supported on silica‐alumina, substantial deviations from Anderson‐Schulz‐Flory statistics occur during the first few days on stream. These deviations gradually disappear with increasing time on stream leading to normal selectivity behaviour. The unsupported catalysts displayed remarkably high activity and selectivity maintenance, in contrast to supported catalysts, which show substantial oscillations in the catalytic behaviour.

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Section: Unsupported Catalystssupporting

confidence: 92%

Section: Unsupported Catalystssupporting

confidence: 85%

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confidence: 99%

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Catalytic hydrogenation of carbon monoxide to alkenes over partially degraded iron‐cobalt complexes

Snel

1989

Can J Chem Eng

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“…In addition, the olefin/paraffin ratio in the C2-C4 fraction decreased, indicating the conversion dependence of selectivity over all catalysts (Amelse et a]., 198 1 ;Novak et al, 1982;Arcuri et al, 1984;Lee et al 1990). In addition, the olefin/paraffin ratio in the C2-C4 fraction decreased, indicating the conversion dependence of selectivity over all catalysts (Amelse et a]., 198 1 ;Novak et al, 1982;Arcuri et al, 1984;Lee et al 1990).…”

Section: Reductionmentioning

confidence: 96%

Hydrogenation of carbon dioxide on iron catalysts doubly promoted with manganese and potassium

et al. 1992

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The effect of addition of manganese and potassium promoters onto iron catalysts for hydrogenation of carbon dioxide was investigated. Catalyst characterizations were performed using BET surface area measurement, carbon monoxide chemisorption, temperature-programmed reduction and Mossbauer spectroscopy. It was noted that metallic iron catalysts were carburized to 0-Fe,C and x-FeSC, as well as oxidized to Fe30, during the course of reaction. The promotional effect of manganese was reflected in stabilization of catalytic behavior owing to a higher resistance to bulk oxidation.However, the distribution of hydrocarbon products did not change significantly in the presence of manganese promoter.With further addition of potassium promoter, the bulk phase was more likely to transform to carbides, and the selectivity toward olefins and long-chain hydrocarbons was remarkably enhanced.On a itudik I'effet de I'ajout de promoteurs au manganbse et potassium sur des catalyseurs de fer pour I'hydrogination du gaz carbonique. La caractkrisation des catalyseurs a etk realiske par une mesure BET de la zone de surface, la chimisorption de I'oxyde de carbone, une reduction i tempkrature programmke et la spectroscopie Mossbauer. On a remarquk que les catalyseurs de fer mttallique sont ckmentks en 0-Fe,C et X-Fe,C2 et qu'ils sont oxydes en Fe,O, lors de la rkaction. L'effet promotionnel du manganbse se reflkte dans la stabilisation du comportement catalytique en raison d'une plus haute rksistance B I'oxydation en masse. Cependant, la distribution des hydrocarbures ne change pas de facon significative en prksence du promoteur au manganbse. Avec un nouvel ajout de promoteur de potassium. la phase principale est plus susceptible de se transformer en carbures, et la selectivitk vers les olefines et les hydrocarbures de chaines longues est remarquablement amkliorke.

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“…Fe-Co or Fe-Cu, Fe-Ni bimetallic catalysts are synthesized and investigated as they have unique catalytic properties in the FTS reaction [84][85][86]. Fe-Co bimetallic catalyst can be synthesized by a number of methods such as coprecipitation [87], coimpregnation [88], plasma sprayed [89], sol-gel method [90], microwave hydrothermal synthesis [91], or by just physical mixing [92].…”

Section: Bimetallic Effectmentioning

confidence: 99%

Fischer-Tropsch synthesis nanostructured catalysts: understanding structural characteristics and catalytic reaction

Zhai

Sun

Zhu

et al. 2013

Nanotechnology Reviews

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One key goal of heterogeneous catalysis study is to understand the correlation between the catalyst structure and its corresponding catalytic activity. In this review, we focus on recent strategies to synthesize well-defined Fischer-Tropsch synthesis (FTS) nanostructured catalysts and their catalytic performance in FTS. The development of those promising catalysts highlights the potentials of nanostructured materials to unravel the complex and dynamic reaction mechanism, particularly under the in situ reaction conditions. The crucial factors associated with the catalyst compositions and structures and their effects on the FTS activities are discussed with an emphasis on the role of theoretical modeling and experimental results.

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Iron alloy Fischer-Tropsch catalysts IV. Reaction and selectivity studies of the FeCo system

Cited by 56 publications

References 14 publications

Catalytic hydrogenation of carbon monoxide to alkenes over partially degraded iron‐cobalt complexes

Catalytic hydrogenation of carbon monoxide to alkenes over partially degraded iron‐cobalt complexes

Hydrogenation of carbon dioxide on iron catalysts doubly promoted with manganese and potassium

Fischer-Tropsch synthesis nanostructured catalysts: understanding structural characteristics and catalytic reaction

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