Promotion Effects in Co-based Fischer–Tropsch Catalysis

doi:10.1039/9781847555229-00001

Cited by 32 publications

(4 citation statements)

References 29 publications

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“…In general, the addition of noble metals may provide a remedy. Ru, Re and Pt were shown to facilitate the reduction of cobalt oxide and to improve Co metal dispersion [2,11,12]. A similar stabilization effect was reported for cobalt-based catalysts promoted with ZrO 2 [13].…”

Section: Introductionsupporting

confidence: 65%

Superior Fischer-Tropsch performance of uniform cobalt nanoparticles deposited into mesoporous SiC

Iablokov

Алексеев

Gryn

et al. 2020

Journal of Catalysis

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a b s t r a c tElectrochemically-derived well-crystalline mesoporous silicon carbide (pSiC) was used as a host for cobalt nanoparticles to demonstrate superior catalytic performance during the CO hydrogenation according to Fischer-Tropsch. Colloidal Co nanoparticles (9 ± 0.4 nm) were prepared independently using colloidal recipes before incorporating them into pSiC and, for comparison purposes, into commercially available silica (Davisil) as well as foam-like MCF-17 supports. The Co/pSiC catalyst demonstrated the highest (per unit mass) catalytic activity of 117 lmol CO g Co À1 s À1 at 220°C which was larger by about one order of magnitude as compared to both silica supported cobalt catalysts. Furthermore, a significantly higher C 5+ hydrocarbons selectivity was observed for Co/pSiC. The stable performance of the catalyst is attributed to the high dispersion of the active phase and the use of pSiC acting as a thermally conductive and chemically inert mesoporous support.

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Section: Introductionsupporting

confidence: 65%

Superior Fischer-Tropsch performance of uniform cobalt nanoparticles deposited into mesoporous SiC

Iablokov

Алексеев

Gryn

et al. 2020

Journal of Catalysis

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“…Therefore, a trade-off must be found. In the direction of improving support characteristics, structural promotors belonging to transition metal oxides, namely, zirconia, chromia or manganese oxides, and some rare earth metal oxides, namely, lanthanide, ceria, or thorium oxide are sometimes added to conventional supports like alumina, silica, or titania to enhance the active phase dispersion and its stability, subsequently, leading to improved performance in FT synthesis [15]. Mesoporous periodic silicas (MCM41 and SBA-15) are another group of model catalytic supports with tailored pore size distributions that enable to study their effect in FT synthesis [16,17].…”

Section: Introductionmentioning

confidence: 99%

Hydroxyapatite as a new support material for cobalt-based catalysts in Fischer-Tropsch synthesis

Munirathinam

Minh

Nzihou

2020

International Journal of Hydrogen Energy

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“…Однако в большинстве этих публикаций рассматриваются катализаторы, методы их приготовления и условия синтеза ФТ [8,10], которые значительно отличаются от представленных в настоящей работе. Каталитические системы характеризуются меньшим (от 5 до 15 мас.%) содержанием кобальта [9,10,12], тогда как для стабильной работы катализаторов и получения жидких и твердых продуктов синтеза предпочтительно использовать высокие концентрации металла (не менее 20 мас.%) и различные соотношения кобальта и промотора [8]. Исследования были проведены на катализаторах с носителями разной химической природы.…”

Section: Introductionunclassified

“…Исследования были проведены на катализаторах с носителями разной химической природы. Например, активированном угле для селективного образования олефинов [11], силикагеле HMS [10], оксиде с эффектом сильного взаимодействия с кобальтом TiO 2 [9,12] [15]. Как следствие, формируются дополнительные активные центры катализа.…”

Section: Introductionunclassified

Influence of Manganese on Formation of Active Phase of Cobalt Catalyst of Hydrocarbon Synthesis

Сулима¹,

Салиев²,

Chistyakova³

et al. 2020

IVKKT

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The active phase and catalytic properties of cobalt catalysts of Fischer-Tropsch synthesis promoted with manganese and prepared by impregnation were studied. KSKG silica gel having a monodisperse structure with an average pore diameter of 12–16 nm was used as a support. The cobalt content in the obtained samples was 20.8-21.8 wt.%, manganese content was 0.5–2 wt.%. The structural characteristics of the catalysts were investigated by X-ray diffraction, transmission electron microscopy, temperature-programmed reduction and temperature-programmed hydrogen desorption. The catalytic activity and selectivity of the samples in the process of hydrocarbon synthesis were researched in the flow mode at a pressure of 0.1 MPa, at a Gas Hourly Space Velocity (GHSV) of 100 h–1, at the temperatures of 150–220 °C and a ratio of CO to hydrogen in synthesis gas of 2:1. Preliminary reduction of catalysts was carried out with hydrogen at a temperature of 400 °C. In the composition of the studied samples with manganese the formation of solid solutions of metals such as xCo3O4–(1–x)Mn3O4 was confirmed. It is shown that the reduction process of Co3O4 is determined by the composition and structure of solid solutions of components that are hard-to-recover compounds. The features of the promoting action of manganese depending on the concentration are determined. The introduction of 0.5–2 wt.% manganese allows to regulate the composition and microstructure of cobalt oxide compounds, the properties of metallic Co, increases the catalytic characteristics: activity, selectivity for C5+ and reduces the yield of methane. It is shown how, depending on the content of the metal additive, the manifestations of the structural (at a concentration of 0–1 wt.%) or electronic (at a concentration of 2 wt.%) promoting action of manganese increase. The optimum concentration of manganese is 1 wt.%. The catalyst is characterized by the minimum average size of crystallites, the highest value of the specific surface of cobalt metal and the maximum catalytic indicators.

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Promotion Effects in Co-based Fischer–Tropsch Catalysis

Cited by 32 publications

References 29 publications

Superior Fischer-Tropsch performance of uniform cobalt nanoparticles deposited into mesoporous SiC

Superior Fischer-Tropsch performance of uniform cobalt nanoparticles deposited into mesoporous SiC

Hydroxyapatite as a new support material for cobalt-based catalysts in Fischer-Tropsch synthesis

Influence of Manganese on Formation of Active Phase of Cobalt Catalyst of Hydrocarbon Synthesis

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