Design of Mixed Metal Oxides with Increased Catalytic Activity for Fischer–Tropsch Synthesis

Saheli, Sania; Rezvani, Ali Reza; Rigi, S; Dušek, Michal; Eigner, Václav; Jarošová, Markéta

doi:10.1007/s10562-019-02886-5

Cited by 10 publications

(6 citation statements)

References 36 publications

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“…Furthermore, the catalyst derived from an inorganic precursor has a smaller particle size which is usually stayed in the optimum range (

>

10 nm) for Fischer‐Tropsch synthesis. Meanwhile, the catalyst produced from an inorganic complex has a higher surface area which enhances the exposed surface area of the active sites [46] . To show the importance of this subject, the pure Co catalysts supported on silica and alumina were studied.…”

Section: Resultsmentioning

confidence: 99%

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Production of light olefins and C₅⁺ hydrocarbons in the Fischer‐Tropsch synthesis by using inorganic precursor

et al. 2022

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The role of the synthetic route in Fischer-Tropsch synthesis (FTS) over the BaÀ Co-Mn catalysts was investigated in the fixed bed micro reactor. Synthesis of catalysts through inorganic complex [Ba 0.5 Co 0.34 Mn 0.66 (btc) 2 (H 2 O) 5 ] (1) led to enhancement of the surface area and decreased particle sizes. Therefore, the catalytic activity of catalysts prepared this way was improved as well as their olefins and C 5 + selectivity. The synthesised catalysts prepared by inorganic precursor had higher selectivity to heavier hydrocarbons at high pressure in comparison to lower pressure.

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“…Furthermore, the catalyst derived from an inorganic precursor has a smaller particle size which is usually stayed in the optimum range (

>

Section: Resultsmentioning

confidence: 99%

“…Meanwhile, the catalyst produced from an inorganic complex has a higher surface area which enhances the exposed surface area of the active sites. [46] To show the importance of this subject, the pure Co catalysts supported on silica and alumina were studied. The Co/Al 2 O 3 and Co/SiO 2 catalysts were characterised by XRD (Figure S2).…”

Section: Chemistryselectmentioning

confidence: 99%

Production of light olefins and C₅⁺ hydrocarbons in the Fischer‐Tropsch synthesis by using inorganic precursor

et al. 2022

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“…The frequencies at 1080 and 918 cm −1 is attributable to C-H in-plane and out-of-plane bending modes, respectively [47,48]. Also, the peak at 761 cm −1 is due to the bending mode of δ(O-C-O) [49,50]. The bands at 660 and 585 cm −1 are due to the stretching vibration modes of Co-N and Co-O, respectively.…”

Section: Characterization Of Synthesized Complexesmentioning

confidence: 96%

A comparative study of micro- and nano-structured di-nuclear Co(II) complex, designed to produce efficient nano-sorbent of Co3O4 applicable in the removal of Pb2+

Razmara

2020

SN Appl. Sci.

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A di-nuclear inorganic complex, formulated as [Co 2 (H 2 O) 5 (pdc) 2 ]·2H 2 O (1) that pdc 2− is pyridine-2,6-dicarboxylato has been synthesized under hydrothermal condition and sonochemical irradiation. Depending on the synthetic conditions, different morphology has been obtained for complex 1. Complex 1 hydrothermal (hc) which obtained as single crystal is a micro-structured compound and was characterized by single crystal X-ray diffraction. Complex 1 ultrasound (uc) is a nano-structured compound and obtained as precipitate. Structural comparison of hc and uc by Fourier-transform infrared spectroscopy (FT-IR), powder X-ray diffraction, and scanning electron microscopy (SEM) revealed that both synthesized complexes have the same structure with different particles size and morphology. In this study, a new synthetic route has been developed to prepare Co 3 O 4 nanoparticles for environmental catalytic applications. Effective sorbents Co 3 O 4 -hc and Co 3 O 4 -uc were prepared by thermolysis of dinuclear cobalt complexes and characterized by FT-IR, SEM, XRD, and Brunauer-Emmett-Teller specific surface area. Co 3 O 4 -hc and Co 3 O 4 -uc were used as nano-sorbents for the removal Pb(II) from aqueous solution. Detailed sorption studies showed that both synthetic sorbents are valuable to remove Pb(II) from wastewater. The effective catalytic performance of the as-prepared sorbents can be attributed to the physicochemical features of synthetic catalysts, such as mesoporous nature, homogenous dispersion of the active phase, small particle size and high surface area. The effects of contact time, pH, Pb(II) and adsorbent dosage to remove Pb(II) were investigated. Maximum adsorption percent of Co 3 O 4 -hc and Co 3 O 4 -uc at room temperature were found to be 90 and 92.2%, respectively. The selectivity of the as-prepared catalysts toward metal ions Pb(II), Co(II), Cr(III), Cu(II), Fe(II), Hg(II), Mn(II) and Ni(II) exhibited that Co 3 O 4 catalysts have the highest selectivity toward Pb(II). Also, the synthetic catalysts Co 3 O 4 -hc and Co 3 O 4 -uc showed an excellent cycling performance for Pb(II) removal up to 85.3 and 83.4% recovery over five cycles.

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“…This method significantly optimizes the catalyst's physicochemical properties. [ 23–28 ] Herein, [Co 1.33 Mn 0.667 (C 7 H 3 NO 4 ) 2 (H 2 O) 5 ].2H 2 O inorganic complex is used for producing Co–Mn catalyst. The efficacy of the production procedure, thermal decomposition of inorganic precursor vs. impregnation, is evaluated in the fixed bed microreactor.…”

Section: Introductionmentioning

confidence: 99%

“…This method significantly optimizes the catalyst's physicochemical properties. [23][24][25][26][27][28] Herein, [Co Synthesis of Co-Mn/Al 2 O 3 catalyst (thereinafter CMS): An aqueous solution containing 3.9 g of compound 1 was mixed by 0.6 g of alumina (Sasol). The mixture was stirred at 80 C in a rotary evaporator for 5 h. The inorganic precursor was obtained by filtration and dried in oven at 100 C for 10 h, followed by calcinations at 600 C at the atmosphere of static air in an electric furnace for 6 h.…”

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Synthesis new Co–Mn mixed oxide catalyst for the production of light olefins by tuning the catalyst structure

Saheli

Rezvani

Arabshahi

et al. 2020

Applied Organom Chemis

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In order to increase the catalyst activity for Fischer-Tropsch synthesis (FTS), the preparation methods of two new catalysts were studied. The chemically identical bimetallic Co-Mn/Al 2 O 3 catalysts were synthesized by different synthetic methods: (a) via thermal decomposition of the complex [Co 1.33 Mn 0.667 (C 7 H 3 NO 4) 2 (H 2 O) 5 ].2H 2 O (1) and (b) by the impregnation technique. The complex was characterized by the single-crystal analysis, elemental analysis, and Fourier-transform infrared (FT-IR) spectroscopy. Both catalysts were characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectrometry (EDS), Brunauer-Emmett-Teller (BET) specific surface area, hydrogen temperature-programmed reduction (H 2-TPR), and H 2-chemisorption. The catalysts' activity was investigated for the Fischer-Tropsch synthesis in a fixed bed microreactor. Higher activity was obtained for the catalyst prepared by thermal decomposition of the inorganic precursor due to its small particle size, superior dispersion, and higher surface area. The results show that the catalyst prepared thermal decomposition has 21% ethylene, 10% propylene, and 50% C 5 + selectivity, while methane selectivity of this catalyst is 11% at 250 C. On the other hand, the catalyst obtained by the impregnation method displays 15% ethylene, 8% propylene, 29% C 5 + , and 29% methane selectivity at the same temperature.

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Design of Mixed Metal Oxides with Increased Catalytic Activity for Fischer–Tropsch Synthesis

Cited by 10 publications

References 36 publications

Production of light olefins and C₅⁺ hydrocarbons in the Fischer‐Tropsch synthesis by using inorganic precursor

Production of light olefins and C₅⁺ hydrocarbons in the Fischer‐Tropsch synthesis by using inorganic precursor

A comparative study of micro- and nano-structured di-nuclear Co(II) complex, designed to produce efficient nano-sorbent of Co3O4 applicable in the removal of Pb2+

Synthesis new Co–Mn mixed oxide catalyst for the production of light olefins by tuning the catalyst structure

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Design of Mixed Metal Oxides with Increased Catalytic Activity for Fischer–Tropsch Synthesis

Cited by 10 publications

References 36 publications

Production of light olefins and C5+ hydrocarbons in the Fischer‐Tropsch synthesis by using inorganic precursor

Production of light olefins and C5+ hydrocarbons in the Fischer‐Tropsch synthesis by using inorganic precursor

A comparative study of micro- and nano-structured di-nuclear Co(II) complex, designed to produce efficient nano-sorbent of Co3O4 applicable in the removal of Pb2+

Synthesis new Co–Mn mixed oxide catalyst for the production of light olefins by tuning the catalyst structure

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Production of light olefins and C₅⁺ hydrocarbons in the Fischer‐Tropsch synthesis by using inorganic precursor

Production of light olefins and C₅⁺ hydrocarbons in the Fischer‐Tropsch synthesis by using inorganic precursor