Effect of Ru-promotion on the catalytic performance of a cobalt-based Fischer-Tropsch catalyst activated in syngas or H2

Shiba, Nothando C.; Liu, Xinying; Mao, Huaping; Qian, Xuefeng; Hildebrandt, Diane; Yao, Yali

doi:10.1016/j.fuel.2022.123939

Cited by 11 publications

(7 citation statements)

References 34 publications

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“…The comparison of the 20% Co/SBA-15 catalyst with other cobalt catalysts used in other studies showed that the catalyst reported here was productive at low temperatures and a low molar ratio of hydrogen to carbon. The 15% Co/SiO 2 catalyst reported by Shiba et al [40] showed higher C 5+ selectivity (75%) but also had higher CH 4 selectivity (18%), indicating a narrower hydrocarbon distribution than the 20% Co/SBA-15 catalyst. The Ru-promoted 15% Co/SiO 2 catalyst, also reported by Shiba et al [40], performed better and showed higher C 5+ selectivity (90%) and a broader distribution of hydrocarbons.…”

Section: Catalytic Evaluation In Ftsmentioning

confidence: 86%

“…The 15% Co/SiO 2 catalyst reported by Shiba et al [40] showed higher C 5+ selectivity (75%) but also had higher CH 4 selectivity (18%), indicating a narrower hydrocarbon distribution than the 20% Co/SBA-15 catalyst. The Ru-promoted 15% Co/SiO 2 catalyst, also reported by Shiba et al [40], performed better and showed higher C 5+ selectivity (90%) and a broader distribution of hydrocarbons.…”

Section: Catalytic Evaluation In Ftsmentioning

confidence: 86%

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Fischer-Tropsch Synthesis on Co/SBA-15 Catalyst: Characterization and Oligomerization Modeling

Menezes¹,

Paula²,

Lima³

et al. 2022

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In this study, we investigated the oligomerization mechanism of the Fischer-Tropsch synthesis catalyzed by a cobalt-based catalyst supported by SBA-15. The Co/SBA-15 catalyst contained 20% w/w of cobalt. It was prepared by the wet impregnation method and characterized by X-ray diffraction (XRD), N2 adsorption-desorption, temperature-programmed reduction (TPR), and scanning electron microscopy coupled to X-ray energy dispersion spectroscopy (SEM-EDS). The FT synthesis was conducted in a slurry bed reactor operating at 240–270°C, 2.0–3.0 MPa, and 1:1–2:1 H2:CO ratio (mol:mol). An oligomerization model, based on alkyl and alkenyl mechanisms for hydrocarbon chain propagation, was used for product distribution. Impregnation with cobalt and calcination did not alter the structure of SBA-15. Cobalt oxides, including Co2O3 and Co3O4, were the active phases of the reaction. Adding cobalt to the support lowered the specific surface area and the pore volume of the support but did not change the structure of SBA-15. Fischer-Tropsch synthesis and C5+ hydrocarbon selectivity increased at a low H2:CO ratio (1.0) and low temperatures (240–255°C). The content of branched-chain paraffin and olefins increased with a decrease in the H2:CO ratio and temperature. The parameters of the model were estimated, and the assumption of a dual mechanism was satisfied.

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Section: Catalytic Evaluation In Ftsmentioning

confidence: 86%

Section: Catalytic Evaluation In Ftsmentioning

confidence: 86%

Fischer-Tropsch Synthesis on Co/SBA-15 Catalyst: Characterization and Oligomerization Modeling

Menezes¹,

Paula²,

Lima³

et al. 2022

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“…It is because of this concept that promoters gained attention and led researchers to find convectional ways to establish promoter effects on FT catalysts. Promoters are deposited in small amounts on catalysts to enhance catalyst performance and stability [14,[108][109][110][111][112]. In numerous circumstances, the effects of promoters are interconnected creating a tough decision to exactly tell the real role brought by such a promoter.…”

Section: Support Promotionmentioning

confidence: 99%

Advances on Catalyst Support Modification and their Effect on Fischer Tropsch Synthesis: A Review

Thibanyane,

Gorimbo,

Yao

2024

Preprint

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One important goal of research on heterogeneous catalysis for Fischer Tropsch synthesis (FTS) is to understand the connection linking catalyst morphology and its activity. Development of these effective catalysts highlights the potential for understanding the effectiveness of promoted supported catalysts and revealing their complex and dynamic effects in FTS. The metal-support interaction (MSI) is influenced by the physicochemical and textural features provided by the modified support and can directly influence the sizes of active metal crystallites, reactants and/or products mass transfer, dispersion, mechanical strength, stability and consequently the adsorption-desorption characteristics of the catalyst. Herein, this article explores the general strategies for modifying silica supports (achieved through doping, coating, or promoting the support or support precursor) and how these strategies can be manipulated to further alter catalyst performance and product selectivity by enhancing the amount of active metal species and improving the intrinsic turnover frequency (TOF). Furthermore, the review emphasises a new strategy (the inverse model of the silica support modification) aiming at overcoming the challenges posed by active metal coating or coverage, as well as pore blockages by promoters that occur during conventional preparation of promoted silica supported FT catalysts.

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“…FTS has been extensively investigated for more than 50 years, and the various research on transforming syngas into light olefins is focused on Fe-, Co-, and Ru-based catalysts [6][7][8][9][10][11]. Among these catalysts, modified Fe-based catalysts are of great promise for the direct conversion of syngas to HVOs, because of their advantages of low cost and high selectivity towards olefins [12].…”

Section: Introductionmentioning

confidence: 99%

Highly Efficient Synthesis of High‐Value Olefins from Syngas over Layered Fe‐Mn/Magadiite Catalyst

et al. 2023

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The simultaneous realization of high olefin/paraffin (O/P) ratio and low CH4 selectivity has always been a bottleneck for the conversion of syngas to high‐value olefins (HVOs). Magadiite (MAG) is a layered silicate material with active SiOH, which increases the interlayer charge density and ion‐exchange ability. Herein, a MAG‐supported, Mn‐modified Fe3O4 microsphere catalyst exhibits excellent CO conversion of 76.5 % and HVO selectivity, with a high O/P ratio of 5.02 and low CH4 selectivity of 16.1 % for conversion of syngas to HVOs. The layered structure of the MAG support promotes dispersion of the active centers and the Mn promoter improves the basic properties of the catalyst. Moreover, the Mn promoter and MAG support have a synergistic effect, which promotes CO dissociation and suppresses H2 adsorption, thereby resulting in high HVO selectivity and low CH4 selectivity.

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Effect of Ru-promotion on the catalytic performance of a cobalt-based Fischer-Tropsch catalyst activated in syngas or H2

Cited by 11 publications

References 34 publications

Fischer-Tropsch Synthesis on Co/SBA-15 Catalyst: Characterization and Oligomerization Modeling

Fischer-Tropsch Synthesis on Co/SBA-15 Catalyst: Characterization and Oligomerization Modeling

Advances on Catalyst Support Modification and their Effect on Fischer Tropsch Synthesis: A Review

Highly Efficient Synthesis of High‐Value Olefins from Syngas over Layered Fe‐Mn/Magadiite Catalyst

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