Effects of promoters and calcination conditions on the catalytic performance of iron–manganese catalysts for Fischer–Tropsch synthesis

The effects of [Fe]/[Mn] molar ratios, promoters, loading of optimal promoter and calcination conditions on the catalytic performance of iron–manganese catalysts for the Fisher–Tropsch synthesis (FTS) were investigated. It was found that the 50%Fe/50%Mn catalyst that was promoted with 6wt.% K is an...

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Bibliographic Details
Published in:Fuel processing technology 2011-05, Vol.92 (5), p.1136-1143
Main Authors: Feyzi, Mostafa, Irandoust, Mohsen, Mirzaei, Ali Akbar
Format: Article
Language:English
Subjects:
alkenes
Applied sciences
Calcination behaviors
catalysts
catalytic activity
Catalytic performance
differential scanning calorimetry
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Fuels
iron
manganese
nitrogen
Operational condition
Promoter
synthesis gas
temperature
thermogravimetry
X-ray diffraction
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Summary:The effects of [Fe]/[Mn] molar ratios, promoters, loading of optimal promoter and calcination conditions on the catalytic performance of iron–manganese catalysts for the Fisher–Tropsch synthesis (FTS) were investigated. It was found that the 50%Fe/50%Mn catalyst that was promoted with 6wt.% K is an optimal catalyst for the conversion of synthesis gas to hydrocarbons especially light olefins. The effects of calcination behaviors and operational conditions on the catalytic performance of optimal catalyst were investigated. The results are shown that the best operational conditions are the H2/CO=2/1 molar feed ratio at 280°C and GHSV=1400h−1 under 3bar total pressure. Characterization of catalysts were carried out using X-ray diffraction (XRD), temperature program reduction (TPR), thermal gravimetric analysis (TGA) and differential scanning calorimetry (DSC), and the N2 adsorption–desorption measurements such as Brunauer–Emmett–Teller (BET) and Barrett–Joyner–Halenda (BJH) methods. ► Effect of calcination conditions for light olefins production by Fe/Mn catalysts was studied. ► It was found that the catalyst was promoted with 6 wt.% K is optimal catalyst. ► The reaction conditions were found 280°C, 3 atm, H2/CO=2/1 and GHSV=1400 h−1. ► Methane selectivity decreased from 20.3 to 6.1% by using optimal catalyst.
ISSN:0378-3820
1873-7188
DOI:10.1016/j.fuproc.2011.01.010