Effect of preparation method on catalytic performance, structure and surface reaction rates of MgO supported Fe–Co–Mn catalyst for CO hydrogenation

J of Chemical Tech & Biotech

et al. 2021

The co-precipitated Co-Ni-Mn nano-catalysts were evaluated for carbon monoxide hydrogenation. The influence of Al 2 O 3 , SiO 2 , Zeolite, Active carbon, MgO supports and then the effect of best chosen support loading on the catalytic behavior and structure of ternary Co-Ni-Mn nano-catalysts were studied. The Co-Ni-Mn/20 wt%SiO 2 sample has shown highest selectivity toward light olefins production. Furthermore the influence of process conditions was investigated. Evaluation tests were performed under process conditions of P = 1-10 bar, T = 523-623 K, and H 2 /CO = 0.67-3. The Response Surface Methodology (RSM) method was used for modeling and optimization process and the best conditions for catalyst evaluation were determined (T = 598.16 K, P = 1 atm and H 2 /CO = 2.19). Under these conditions the highest selectivity of light olefins, higher CO conversion % and lower selectivity toward methane were achieved. Catalysts characteristics were investigated using XRD, BET, TEM, TGA, DSC, SEM, XPS, and TPR techniques.

Section: Resultsmentioning

confidence: 99%

Improvement of light olefins production over the Co‐Ni‐Mn nano‐catalyst: modeling and optimization of process by RSM

J of Chemical Tech & Biotech

et al. 2021

“…10 Fe-Co catalysts favor Fe-Co alloy formation. 11,12 The addition of Mn to Fe or Co catalysts brings about a significant increase in light olefin formation and a decrease in methane selectivity. [13][14][15][16] An approach to improve the selectivity of classical FT processes for the conversion of synthesis gas into hydrocarbons involves the use of a bifunctional catalyst system containing a metal catalyst combined with a support.…”

Section: Introductionmentioning

confidence: 99%

CO hydrogenation reaction on Fe–Co–Mn nanocatalyst: impact of support and process conditions on performance and structure

J of Chemical Tech & Biotech

Zamani

et al. 2021

“…The addition of Mn to Fe or Co catalysts brought about a significant increase in light olefins formation and a decrease in methane selectivity [21][22][23]. In our previous work we used the Fe-Co-Mn ternary catalyst for the first time and investigate different preparation and operational conditions over this catalyst for CO hydrogenation [24][25][26][27]. In the present work we investigate the effect of drying conditions on the catalytic performance and catalyst structure of co-precipitated Fe-CoMn catalyst and also investigate different surface reaction rates.…”

Section: Introductionmentioning

confidence: 99%

Effect of Drying Conditions on the Catalytic Performance, Structure, and Reaction Rates over the Fe-Co-Mn/MgO Catalyst for Production of Light Olefins

Bull. Chem. React. Eng. Catal.

Mirzaei

et al. 2017

The MgO-supported Fe-Co-Mn catalysts, prepared using co-precipitation procedure, were tested for production of light olefins via CO hydrogenation reaction. The effect of a range of drying conditions including drying temperature and drying time on the structure and catalytic performance of Fe-Co-Mn/MgO catalyst for Fischer-Tropsch synthesis was investigated in a fixed bed micro-reactor under the same operational conditions of T = 350 °C, P = 1 bar, H2/CO = 2/1, and GHSV = 4500 h -1 . It was found that the catalyst dried at 120 °C for 16 h has shown the best catalytic performance for CO hydrogenation. Furthermore, the effect of drying conditions on different surface reaction rates was also investigated and it was found that the precursors drying conditions influenced the rates of different surface reactions. Characterization of catalyst precursors and calcined samples (fresh and used) was carried out using powder X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Energy Dispersive Spectroscopy (EDS), Brunauer-Emmett-Teller (BET) measurements, Temperature Programmed Reduction (TPR), Thermal Gravimetric Analysis (TGA), and Differential Scanning Calorimetry (DSC). Characterization results showed that different investigated variables (drying conditions) influenced the structure, morphology and catalytic performance of the ternary catalysts.