화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.50, 199-212, June, 2017
DOI10.1016/j.jiec.2017.02.018  Export Citation
Promotional effect of Mo and Ni in plasma-synthesized Co.Fe/C bimetallic nano-catalysts for Fischer.Tropsch synthesis
James Aluha, and Nicolas Abatzoglou†
  • Department of Chemical & Biotechnological Engineering, Université de Sherbrooke, QC, J1 K 2R1, Canada
E-mail:
Two carbon-supported Fischer.Tropsch Synthesis (FTS) catalysts with ternary metallic formulations (10% Mo.70% Co.20% Fe and 10% Ni.70% Co.20% Fe) were synthesized through suspension plasma-spray (SPS) technology. Their average particle size determined by Transmission Electron Microscopy was 8.4 and 13.3 nm respectively and their BET specific surface areas were between 69.85 m2 g-1. As their analogous monometallic and bimetallic formulations presented in previous publications, these catalysts were both non-porous and nanometric with Scanning Electron Microscopy showing uniform metalnanoparticle distribution in the carbon-support matrix. FTS test conditions in a 3-phase continuously stirred-tank slurry reactor operated for 24 h were: 260 °C, 2 MPa pressure, H2:CO = 2, gas hourly specific velocity = 3600 cm3 h-1 g-1 of catalyst. Basing catalyst performance on the bimetallic 80% Co.20% Fe/C catalyst, Ni-addition enhanced catalyst activity from ∼42 to 50% CO conversion, and boosted selectivity towards gasoline fraction (C5-C12) from ∼19 to 50%. Enriching the catalyst-surface acidity by Mopromotion improved selectivity for both gasoline-fraction (19 →33%) and the C5-C20 fraction (74 → 87%) and lowered H2O production by 30%, although at lower CO conversion (∼38%). The catalysts’ a values were ∼0.8 in the C10+ region, and from mass balance their estimated H2 efficiency decreased in the order of Mo.Co.Fe/C >> Co-Fe/C > Ni.Co.Fe/C.
Keywords:Fischer.Tropsch;Plasma-synthesis;Molybdenum;Nickel promotion;Cobalt.iron catalysts
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