Effects of cobalt carbide on Fischer–Tropsch synthesis with MnO supported Co-based catalysts

Sun, Fanfei; Yang, Ruoou; Xia, Zhaoming; Yang, Yuqi; Zhao, Zihan; Gu, Shuang‐Xi; Wu, Dongshuang; Ding, Yunjie; Jiang, Zheng

doi:10.1016/j.jechem.2019.07.007

Cited by 11 publications

(3 citation statements)

References 31 publications

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“…The final and intermediate thermal decomposition products of compound 2 (and compound 1) are potential candidates for Fischer Tropsch synthesis, and their activity is expected to change depending on the preparation routes. The supported and unsupported cobalt manganese oxides, with and without the presence of other metal ions, are extensively studied by Fischer-Tropsch catalysts [65][66][67][68][69][70][71][72][73][74]. The quasi-intramolecular solid-phase redox reactions ensure a good possibility of adjusting the Co:Mn ratio in the formed oxides with the selection of the appropriate precursors and preparation methods [41,42].…”

Section: Characterization Of the Solid Decomposition Productsmentioning

confidence: 99%

Insight into the Structure and Redox Chemistry of [Carbonatotetraamminecobalt(III)] Permanganate and Its Monohydrate as Co-Mn-Oxide Catalyst Precursors of the Fischer-Tropsch Synthesis

Béres,

Dürvanger,

Homonnay

et al. 2024

Inorganics

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[Carbonatotetraamminecobalt(III)] permanganate monohydrate was synthesized first in the metathesis reaction of [Co(NH3)4CO3]NO3 and NaMnO4 in aqueous solution. Its thermal dehydration at 100 °C resulted in phase-pure [Co(NH3)4CO3]MnO4 (compound 1). Compounds 1 and 2 (i.e., the hydrated form) were studied with IR, far-IR, and low-temperature Raman spectroscopies, and their vibrational modes were assigned. The lattice parameters were determined by powder X-ray diffraction (PXRD) and single crystal X-ray diffraction (SXRD) methods for the triclinic and orthorhombic compounds 1 and 2, respectively. The detailed structure of compound 2 was determined, and the role of hydrogen bonds in the structural motifs was clarified. UV studies on compounds 1 and 2 showed the distortion of the octahedral geometry of the complex cation during dehydration because of the partial loss of the hydrogen bonds between the crystal water and the ligands of the complex cation. The thermal decomposition consists of a solid phase quasi-intramolecular redox reaction between the ammonia ligands and permanganate anions with the formation of ammonia oxidation products (H2O, NO, N2O, and CO2). The solid phase reaction product is amorphous cobalt manganese oxide containing ammonium, carbonate (and nitrate) anions. The temperature-controlled thermal decomposition of compound 2 in toluene at 110 °C showed that one of the decomposition intermediates is ammonium nitrate. The decomposition intermediates are transformed into Co1.5Mn1.5O4 spinel with MnCo2O4 structure upon further heating. Solid compound 2 gave the spinel at 500 °C both in an inert and air atmosphere, whereas the sample pre-treated in toluene at 110 °C without and with the removal of ammonium nitrate by aqueous washing, gave the spinel already at 300 and 400 °C, respectively. The molten NH4NO3 is a medium to start spinel crystallization, but its decomposition stops further crystal growth of the spinel phase. By this procedure, the particle size of the spinel product as low as ~4.0 nm could be achieved for the treatments at 300 and 400 °C, and it increased only to 5.7 nm at 500 °C. The nano-sized mixed cobalt manganese oxides are potential candidates as Fischer-Tropsch catalysts.

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Section: Characterization Of the Solid Decomposition Productsmentioning

confidence: 99%

Insight into the Structure and Redox Chemistry of [Carbonatotetraamminecobalt(III)] Permanganate and Its Monohydrate as Co-Mn-Oxide Catalyst Precursors of the Fischer-Tropsch Synthesis

Béres,

Dürvanger,

Homonnay

et al. 2024

Inorganics

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“…However, in CoMnO x mixed oxide, in addition to the Co 0 phase, the presence of MnO x promotes Co 2 C formation during catalyst activation. 180,181 1.5.2.3 Direct Syngas-to-aromatics BTX are bulk aromatic chemicals used as the primary feedstock in the production of a wide variety of intermediates, fine chemicals and materials such as phenolic resins, Kevlar, polystyrene, Bakelite etc. Current industrial production of BTX involves catalytic reforming of naphtha and, more recently, using shale gas via cracking process.…”

Section: Methanol Synthesismentioning

confidence: 99%

Chemicals and Fuels from Biomass via Fischer–Tropsch Synthesis: A Route to Sustainability

2022

Focus on Catalysts

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“…Similarly, Jiang et al synthesized MnO supported Co-based catalysts to understand the effects of Co 2 C for FTS under ambient conditions. They observed several kinds of product selectivity that can be attributed to different active sites (Co and Co 2 C), whose advantages can be combined to produce catalysts with not only more C 5 + products but also lower methane selectivity [116] . Similarly, Li et al explored the performance of CTAB-modified ZIF-based catalysts prepared via MOFMS in a fixed bed reactor.…”

Section: Mof-derived Co-based Catalystsmentioning

confidence: 99%

Metal-organic framework (MOF)-derived catalysts for Fischer-Tropsch synthesis: Recent progress and future perspectives

Otun

Liu

Hildebrandt

2020

Journal of Energy Chemistry

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Effects of cobalt carbide on Fischer–Tropsch synthesis with MnO supported Co-based catalysts

Cited by 11 publications

References 31 publications

Insight into the Structure and Redox Chemistry of [Carbonatotetraamminecobalt(III)] Permanganate and Its Monohydrate as Co-Mn-Oxide Catalyst Precursors of the Fischer-Tropsch Synthesis

Insight into the Structure and Redox Chemistry of [Carbonatotetraamminecobalt(III)] Permanganate and Its Monohydrate as Co-Mn-Oxide Catalyst Precursors of the Fischer-Tropsch Synthesis

Chemicals and Fuels from Biomass via Fischer–Tropsch Synthesis: A Route to Sustainability

Metal-organic framework (MOF)-derived catalysts for Fischer-Tropsch synthesis: Recent progress and future perspectives

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