Effect of carrier properties on the activity of supported KCoMoS catalysts in the synthesis of alcohol from syngas

Anashkin, Yu.; Ishutenko, D. I.; Maximov, V. V.; Пимерзин, А. А.; Коган, В. М.; Nikulshin, P.A.

doi:10.1007/s11144-019-01580-2

Cited by 9 publications

(5 citation statements)

References 32 publications

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“…A positive correlation between the average stacking number of MoS 2 crystallites and total catalytic activities (syngas conversion and total liquid yield at 360 °C) has been observed (Figure S7a,b). This corroborates the results reported by refs − ,, . The lowest catalytic activity of the catalyst supported on AST-fiber AC has been reported due to its smallest average stacking number of MoS 2 crystallites and smallest promotion ratio (Table ), whereas the CNFS-supported catalysts demonstrate the highest performances because of the highest average stacking number N̅ and average length L̅ (nm), which could be linked to the lowest interaction strength between the active phase and support, improving the electronic states of potassium and cobalt atoms, which in turn enhances the catalytic activities of higher alcohol synthesis.…”

Section: Resultssupporting

confidence: 90%

“…Although the highest conversion has been observed over KCoMoS 2 /TiO 2 (48%), 68 the total liquid yield over the current nonpromoted KMoS 2 /CNFS was found to be twice higher (36%). Enlightened by our suggested interpretation, the targeted (K)-NiMoS active phase by Maximov et al 74 illustrates a lower activity than the same phase when nickel atoms move from support to the active phase.…”

Section: Catalytic Conversion Ofmentioning

confidence: 70%

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Higher Alcohol and Oxygenate Synthesis from Synthesis Gas and Ethanol over Supported K-(Co)MoS₂ Catalysts: Effect of Novel Ni-Containing Carbon Nanofiber Supports Formed as Byproducts from Methane Decomposition

Osman,

Dipheko,

Maximov

et al. 2024

Energy Fuels

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The supports nature employed greatly affects the catalytic activities and physicochemical characteristics of catalysts. In the present investigation, after the catalytic decomposition of methane using 82Ni-8Cu/Al 2 O 3 catalyst, an inactive catalyst containing a carbon nanofiber byproduct has been studied as a support for synthesis of higher alcohols and other oxygenates from syngas and ethanol conversion, respectively, over a K-modified Copromoted MoS 2 catalyst. The catalytic results have been compared with those of catalysts supported on Al 2 O 3 , carbon-coated alumina, and two types of fabric-activated carbon (NWA and AST). Besides, an unprompted (K)-MoS 2 catalyst supported on CNF-82Ni-8Cu/ Al 2 O 3 (CNFS) has been tested to investigate the mobility probability of Ni atoms from support to the KMoS 2 active phase. N 2 adsorption−desorption, X-ray fluorescence (XRF), X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS) were used to analyze the sulfided catalysts. On comparing CNFS-supported catalysts to alumina-based supports and fabric-activated carbons, the CNFS-supported catalysts demonstrated the highest ability to resist hydrogenation and water−gas shift reactions. This was due to the highest average stacking number and average slab length, which were likely caused by the minimal interaction between the active phase and CNFS support. As a result, it causes the atoms of potassium and cobalt to develop electronic states that are favorable for the higher synthesis of alcohols. KMoS 2 /CNFS has demonstrated the best selectivity toward ethanol and total liquid yield. The order of supported sulfided catalysts for synthesizing other oxygenates from ethanol conversion decreases as follows: KMoS 2 /CNFS > KCoMoS 2 /AST > KCoMoS 2 /NWA ≥ KCoMoS 2 /CNFS > KCoMoS 2 /CCA ≥ KCoMoS 2 /Al 2 O 3 . For the first time, the possibility of dynamics of nickel ions from support to the active phase has been proven.

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Section: Resultssupporting

confidence: 90%

Section: Catalytic Conversion Ofmentioning

confidence: 70%

Higher Alcohol and Oxygenate Synthesis from Synthesis Gas and Ethanol over Supported K-(Co)MoS₂ Catalysts: Effect of Novel Ni-Containing Carbon Nanofiber Supports Formed as Byproducts from Methane Decomposition

Osman,

Dipheko,

Maximov

et al. 2024

Energy Fuels

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“…Acidic sites on the support also influence the catalytic activity. A high content of strong acid sites has been shown to lead to impeding of alcohol formation and accelerating hydrogenation reactions [31,[33][34][35][36]. As the carbon (modified) supports do not show acidity, they should promote alcohol formation.…”

Section: Discussionmentioning

confidence: 99%

“…Next to influencing the selectivity [31,[33][34][35][36], the acid sites also greatly hamper CO or H 2 activation. One possible explanation might be adsorption of the main by-product, water, on the acid sites, blocking access to the active sites via steric hindering.…”

Section: Discussionmentioning

confidence: 99%

Carbon-Supported KCoMoS2 for Alcohol Synthesis from Synthesis Gas

et al. 2021

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KCoMoS2 was supported on various carbon support materials to study the support effect on synthesis gas conversion. Next to two activated carbons with high micropore volume, a traditional alumina (γ-Al2O3) support and its carbon coated form (CCA) were studied for comparison. Coating alumina with carbon increases the selectivity to alcohols, but the AC-supported catalysts show even higher alcohol selectivities and yields, especially at higher temperatures where the conversions over the AC-supported catalysts increase more than those over the γ-Al2O3-based catalysts. Increasing acidity leads to decreased CO conversion yield of alcohols. The two activated-carbon-supported catalysts give the highest yield of ethanol at the highest conversion studied, which seems to be due to increased KCoMoS2 stacking and possibly to the presence of micropores and low amount of mesopores.

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“…There is currently limited information available for direct comparison of supports for trimetallic catalysts because of the recent development of the TMNP domain; however, reports have emerged that illustrate the importance of choosing the appropriate support and method of preparation when working with trimetallic catalysts, such as the use of different carbon support types for CO hydrogenation over alkali-promoted CoRhMo catalysts. , These choices can drastically impact the overall catalytic performance. ,,− These aspects of TMNP catalyst design will be examined in greater detail in the following sections on catalyst preparation and testing.…”

Section: Properties Of Trimetallic Nanoparticlesmentioning

confidence: 99%

Heterogeneous Trimetallic Nanoparticles as Catalysts

et al. 2022

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The development and application of trimetallic nanoparticles continues to accelerate rapidly as a result of advances in materials design, synthetic control, and reaction characterization. Following the technological successes of multicomponent materials in automotive exhausts and photovoltaics, synergistic effects are now accessible through the careful preparation of multielement particles, presenting exciting opportunities in the field of catalysis. In this review, we explore the methods currently used in the design, synthesis, analysis, and application of trimetallic nanoparticles across both the experimental and computational realms and provide a critical perspective on the emergent field of trimetallic nanocatalysts. Trimetallic nanoparticles are typically supported on high-surface-area metal oxides for catalytic applications, synthesized via preparative conditions that are comparable to those applied for mono- and bimetallic nanoparticles. However, controlled elemental segregation and subsequent characterization remain challenging because of the heterogeneous nature of the systems. The multielement composition exhibits beneficial synergy for important oxidation, dehydrogenation, and hydrogenation reactions; in some cases, this is realized through higher selectivity, while activity improvements are also observed. However, challenges related to identifying and harnessing influential characteristics for maximum productivity remain. Computation provides support for the experimental endeavors, for example in electrocatalysis, and a clear need is identified for the marriage of simulation, with respect to both combinatorial element screening and optimal reaction design, to experiment in order to maximize productivity from this nascent field. Clear challenges remain with respect to identifying, making, and applying trimetallic catalysts efficiently, but the foundations are now visible, and the outlook is strong for this exciting chemical field.

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Effect of carrier properties on the activity of supported KCoMoS catalysts in the synthesis of alcohol from syngas

Cited by 9 publications

References 32 publications

Higher Alcohol and Oxygenate Synthesis from Synthesis Gas and Ethanol over Supported K-(Co)MoS₂ Catalysts: Effect of Novel Ni-Containing Carbon Nanofiber Supports Formed as Byproducts from Methane Decomposition

Higher Alcohol and Oxygenate Synthesis from Synthesis Gas and Ethanol over Supported K-(Co)MoS₂ Catalysts: Effect of Novel Ni-Containing Carbon Nanofiber Supports Formed as Byproducts from Methane Decomposition

Carbon-Supported KCoMoS2 for Alcohol Synthesis from Synthesis Gas

Heterogeneous Trimetallic Nanoparticles as Catalysts

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Effect of carrier properties on the activity of supported KCoMoS catalysts in the synthesis of alcohol from syngas

Cited by 9 publications

References 32 publications

Higher Alcohol and Oxygenate Synthesis from Synthesis Gas and Ethanol over Supported K-(Co)MoS2 Catalysts: Effect of Novel Ni-Containing Carbon Nanofiber Supports Formed as Byproducts from Methane Decomposition

Higher Alcohol and Oxygenate Synthesis from Synthesis Gas and Ethanol over Supported K-(Co)MoS2 Catalysts: Effect of Novel Ni-Containing Carbon Nanofiber Supports Formed as Byproducts from Methane Decomposition

Carbon-Supported KCoMoS2 for Alcohol Synthesis from Synthesis Gas

Heterogeneous Trimetallic Nanoparticles as Catalysts

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Product

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Higher Alcohol and Oxygenate Synthesis from Synthesis Gas and Ethanol over Supported K-(Co)MoS₂ Catalysts: Effect of Novel Ni-Containing Carbon Nanofiber Supports Formed as Byproducts from Methane Decomposition

Higher Alcohol and Oxygenate Synthesis from Synthesis Gas and Ethanol over Supported K-(Co)MoS₂ Catalysts: Effect of Novel Ni-Containing Carbon Nanofiber Supports Formed as Byproducts from Methane Decomposition