Effect of Mn on Co/HMS-Mn and Co/SiO2-Mn catalysts for the Fischer-Tropsch reaction

Salazar-Contreras, Héctor G.; Martínez-Hernández, Angel; Boix, Alicia Viviana; Fuentes, Gustavo A.; Torres-Garcı́a, E.

doi:10.1016/j.apcatb.2018.11.067

Cited by 31 publications

(20 citation statements)

References 72 publications

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“…Conversion of biomass/coal-based synthesis gas (i. e., syngas) or CO 2 -containing syngas may be applied to produce long chain hydrocarbons in a process called Fischer-Tropsch synthesis (FTS), [1][2][3][4] or light olefins in a process called Fischer-Tropsch to olefins (FTO, also called FTTO), [5][6][7][8][9] or even oxygenates such as alcohols. [10][11][12] Light olefins (i. e., C 2 = -C 4 = ) contain two to four carbon atoms.…”

Section: Introductionmentioning

confidence: 99%

“…[5] Three major routes, i. e., oxide/zeolite catalysts, cobalt-based catalysts, and iron-based catalysts, have been investigated for direct FTO process with several milestone-level reports by journals like Science and Nature. [6][7][8][9]13] Typical oxide/zeolite methods are unique metal-free routes developed by F. Jiao and X. Bao et al (in 2016) using ZnCrOx/MSAPO-34 [8] as well as by K. Cheng and Y. using ZrO x -ZnO/SAPO-34, [13] which more exactly belong to the tandem catalysis that couples the methanol synthesis and the CÀ C coupling reaction and may lead to very high C 2 = -C 4 = hydrocarbon distribution values of 80 % [8] and 74 %. [13] Typical cobalt-based catalyst method of L. Zhong and Y.…”

Section: Introductionmentioning

confidence: 99%

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Development of Highly Selective Support for CO Hydrogenation to Light Olefins with Partially Passivated Iron Catalysts

et al. 2019

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To rule out disturbances from water‐soluble efficient promoters (e. g., K2O or combination of S/Na), a simplified iron/support catalyst system was employed to investigate novel supports for the catalytic conversion of syngas (CO+H2) to light olefins (FTO). A series of supports with nominal compositions of ZnAl2O4 ⋅ xAl2O3 (x=1, 2, 3) were prepared by coprecipitation and subsequent high temperature calcination at 1200 °C for 24 h to generate partially passivated ZnAl2O4 and Al2O3 phases, through which each formed component of a catalyst may minimize interactions among them and exhibit unique activity. Iron catalysts were prepared by incipient wetness of iron salts over these supports. At a total pressure of ca. 20 bar and a CO conversion of 35 %, a catalyst with a nominal composition of 15 %Fe/85 %(ZnAl2O4 ⋅ 3Al2O3) exhibits a surprising C2=‐C4= hydrocarbon distribution of 58 %, which reaches a huge increase by almost 100 % in comparison with iron catalysts over regular supports (e. g., carbon, gamma‐Al2O3, etc.). This catalyst demonstrates the 1200 °C passivated ZnAl2O4 ⋅ 3Al2O3 as probably the most selective support material for iron‐based FTO catalysts. At CO conversion of 35 %, the contents of ethylene in C2, propylene in C3, and butylene in C4 products achieve extraordinary values of 82 %, 92 %, and 91 %, respectively.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Development of Highly Selective Support for CO Hydrogenation to Light Olefins with Partially Passivated Iron Catalysts

et al. 2019

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“…Кобальтовые катализаторы, включающие марганец, содержат смешанные оксидные фазы металлов с неопределенными стехиометрией и кристаллической структурой наночастиц. В связи с этим механизм действия марганца на свойства катализаторов и границы этого влияния в значительной мере остаются неясными [8][9][10]. В литературе указывается на структурное и (или) электронное стимулирующее действие металла, которое повышает общую эффективность синтеза ФТ [11].…”

Section: Introductionunclassified

“…В литературе указывается на структурное и (или) электронное стимулирующее действие металла, которое повышает общую эффективность синтеза ФТ [11]. 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].…”

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

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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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Cu/MgO Reverse Water Gas Shift Catalyst with Unique CO₂ Adsorption Behaviors

Tsai,

Wu,

Lin

et al. 2024

Chemistry An Asian Journal

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Activation of inert CO2 molecules for the reverse water gas shift (RWGS) reaction is tackled by incorporating magnesium oxide as a support material for copper, forming a Cu/MgO supported catalyst. The RWGS performance is greatly improved when compared with pure Cu or carbon supported Cu (Cu/C). Operating under a weight hourly space velocity (WHSV) of 300,000 mL·g‐1·h‐1, the Cu/MgO catalyst demonstrates high activity, maintaining over 70% equilibrium conversion and nearly 100% CO selectivity in a temperature range of 300‐600 °C. In contrast, both Cu/C and commercial Cu, even at ten‐times lower WHSV, can only achieve up to 40% of the equilibrium conversion and quickly deactivated due to sintering. Based on the studies of in‐situ temperature resolved infrared spectroscopy and temperature programmed desorption, the improved RWGS performance is attributed to the unique adsorption behavior of CO2 on Cu/MgO. Density functional theory studies provides a plausible explanation from a surface reaction perspective and reveals the spill‐over property of CO2 from MgO to Cu being critical.

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Effect of Mn on Co/HMS-Mn and Co/SiO2-Mn catalysts for the Fischer-Tropsch reaction

Cited by 31 publications

References 72 publications

Development of Highly Selective Support for CO Hydrogenation to Light Olefins with Partially Passivated Iron Catalysts

Development of Highly Selective Support for CO Hydrogenation to Light Olefins with Partially Passivated Iron Catalysts

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

Cu/MgO Reverse Water Gas Shift Catalyst with Unique CO₂ Adsorption Behaviors

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Effect of Mn on Co/HMS-Mn and Co/SiO2-Mn catalysts for the Fischer-Tropsch reaction

Cited by 31 publications

References 72 publications

Development of Highly Selective Support for CO Hydrogenation to Light Olefins with Partially Passivated Iron Catalysts

Development of Highly Selective Support for CO Hydrogenation to Light Olefins with Partially Passivated Iron Catalysts

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

Cu/MgO Reverse Water Gas Shift Catalyst with Unique CO2 Adsorption Behaviors

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Product

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Cu/MgO Reverse Water Gas Shift Catalyst with Unique CO₂ Adsorption Behaviors