Effect of rhenium on Fischer–Tropsch synthesis in the presence of cobalt–zeolite catalysts

Asalieva, E. Yu.; Kulchakovskaya, Ekaterina V.; Синева, Л. В.; Мордкович, В. З.

doi:10.1134/s0965544117020116

Cited by 10 publications

(7 citation statements)

References 29 publications

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“…The addition of rhenium to iron or cobalt catalysts promotes higher activity and selectivity towards alcohols and larger chain hydrocarbons, increases particle dispersibility and decreases nanoparticle average sizes while also lowering the reduction temperature of the first metal [32,88,89] . Since the patents of Mauldin, from Exxon, [90] and the Shell Middle Distillate processes, [91] the cobalt catalyst promoted by rhenium has been extensively studied in FTS, and it currently remains a topic of research interest since improvements are still needed in preventing catalyst deactivation and further improving control over selectivity [92–96] …”

Section: Hydrogenation Of Platform Moleculesmentioning

confidence: 99%

Rhenium – A Tuneable Player in Tailored Hydrogenation Catalysis

et al. 2021

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Although rhenium may not be the most common choice of active species in catalysis, it has been reported as a highly active and selective catalyst over a wide range of reactions. Its applications include hydrogenation reactions of great relevance in the field of renewable materials and bio‐derived platform molecules, such as valorization of lignin, CO2, and carboxylic acids. Different from several transition metals, rhenium presents oxidation numbers varying from −3 to +7. Such diversity in the coordination chemistry of rhenium is reflected in the variety of known rhenium compounds, since this metal can form stable structures such as ligand‐bridged multinuclear and organometallic compounds as well as inorganic oxides, metal‐organic frameworks, and clusters. The exceptional flexibility in rhenium speciation yields numerous selective catalysts; however, it also makes the characterization of rhenium catalysts challenging, and its influence on the catalytic activity is not trivial. This review will outline the most established rhenium‐based materials used in hydrogenation catalysis and shed some light on the relation of rhenium species to catalyst selectivity based on advanced characterization techniques. Finally, our perspectives on the use of rhenium catalysts to produce value‐added products will be given.

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Section: Hydrogenation Of Platform Moleculesmentioning

confidence: 99%

Rhenium – A Tuneable Player in Tailored Hydrogenation Catalysis

et al. 2021

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“…The addition of promoters play an important role for the optimization of activity and selectivity of heterogeneous catalysts by modifying the structural or electronic properties of the active phase . Many metals are the promising candidates as promoters for Co‐based catalysts such as Zr, Mn, Ru, Pt and Re during the FTS reaction process. Ru is regarded as the most favorable promoter to facilitate the reduction dispersion of cobalt oxide under low temperature and improve the catalytic performance of Co‐based catalysts for the production of long‐chain hydrocarbons .…”

Section: Introductionmentioning

confidence: 99%

Morphology Evolution of Hcp Cobalt Nanoparticles Induced by Ru Promoter

Liu

Qin

et al. 2020

ChemCatChem

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The modification of the equilibrium morphology to expose active facets of cobalt nanoparticles is essential for tailoring and controlling its catalytic performance. Periodic density functional theory (DFT) was applied to systematically investigate the structure and stability of exposed facets of hcp Co nanoparticles induced by Ru promoter in order to clarify the facet‐dependent equilibrium morphology of hcp Co nanoparticles stabilized by Ru promoter. The adsorption and migration of Ru atom can give rise to the change of the surface energy of exposed facets, thus affecting the equilibrium morphology of the hcp Co nanoparticles. Selectively exposed the high Miller index facets, such as Co(10‐12), Co(11‐20) and Co(11‐21) surfaces, can be tuned by adding Ru promoter. Our theoretical calculation results show that Co(11‐21) becomes the predominantly exposed facet accompanied with the decrease of exposed Co(10‐10) and Co(10‐11) with the increase of Ru loading. Further experimental studies suggest that the area of selectively exposed the Co(10‐11) surface for uniform Co nanoplates loaded with 3.0 wt % Ru will be reduced, which is in agreement with the theoretical predicted result. This work is helpful to design the desired Co‐based FTS catalysts rationally with well‐controlled surface structure.

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“…Reached this point, and considering all the above data, one may wonder which TM surface would be best for the CO dissociation. [40][41][42].…”

Section: Resultsmentioning

confidence: 99%

“…With this guideline in mind, one TM surface outstands; the hcp Re (112 ̅ 0) surface, with an Ea of 0.79 eV and a ΔE of -0.57 eV. Actually, Re has been regarded as a suited additive to Co to improve the FT performance, where CO dissociation is regarded as a possible rate-limiting step[40]. Other TMs could be used for breaking the CO in a suited fashion, e.g.…”

mentioning

confidence: 99%

A Computational Map of the Probe CO Molecule Adsorption and Dissociation on Transition Metal Low Miller Indices Surfaces

Parga

Jurado

Roldán

et al. 2022

Preprint

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The adsorption and dissociation of carbon monoxide (CO) have been studied on 81 Transition Metal (TM) surfaces, with TMs having body centred cubic (bcc), face centred cubic (fcc), or hexagonal close-packed (hcp) crystalline structures. For each surface, CO, C, and O adsorptions, and C+O co-adsorptions were studied by density functional theory calculations on suited slab models, using Perdew-Burke-Ernzerhof functional with Grimme’s D3 correction for dispersive forces. CO dissociation activation and reaction energies, ΔE, were determined. The values, including zero point energy, were used to capture chemical trends along groups, d-series, and crystallographic phases concerning CO adsorption and dissociation, while simulated infrared (IR) spectroscopies and thermodynamic phase diagrams are provided. Late fcc TMs are found to adsorb CO weakly, perpendicularly, and are IR-visible, opposite to early bcc TMs, while hcp cases are distributed along these two extremes. The d-band centre, εd, is found to be the best descriptor for CO adsorptions and C+O co-adsorptions, ΔE, and activation energies. The implications of the found trends and descriptors are discussed on processes requiring CO dissociation, such as Fischer-Tropsch.

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Effect of rhenium on Fischer–Tropsch synthesis in the presence of cobalt–zeolite catalysts

Cited by 10 publications

References 29 publications

Rhenium – A Tuneable Player in Tailored Hydrogenation Catalysis

Rhenium – A Tuneable Player in Tailored Hydrogenation Catalysis

Morphology Evolution of Hcp Cobalt Nanoparticles Induced by Ru Promoter

A Computational Map of the Probe CO Molecule Adsorption and Dissociation on Transition Metal Low Miller Indices Surfaces

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