Abstract
The effects of reduction temperature and reaction temperature, pressure and space velocity on iron-based K/FeCuAlO x Fischer–Tropsch catalysts prepared by co-precipitation were investigated. The catalyst reduced at 150 °C deactivated quickly due to an abundance of unreduced iron species. With increasing reduction temperature, the iron oxide’s phase transformed from hematite (α-Fe2O3) to magnetite (Fe3O4) and finally to metallic iron (α-Fe). The induction period to reach steady-state catalytic activity was reduced at increased reduction temperatures due to in situ reduction by syngas during reaction. CO conversion increased with increasing reaction temperature, and selectivity to C5+ decreased with increasing reaction pressure and space velocity. At reaction temperatures up to of 300 °C, CO2 formation by the water–gas shift reaction was linearly correlated with the extent of CO conversion, and CO2 formation was slightly suppressed at ≥350 °C by a reverse water–gas shift reaction.
Graphical Abstract
The effects of reduction temperature and reaction temperature, pressure and space velocity on iron-based K/FeCuAlOx Fischer–Tropsch catalysts prepared by co-precipitation were investigated. The catalyst reduced at 150 °C deactivated quickly due to an abundance of unreduced iron species. With increasing reduction temperature, the iron oxide’s phase transformed from hematite (α-Fe2O3) to magnetite (Fe3O4) and finally to metallic iron (α-Fe). The induction period to reach steady-state catalytic activity was reduced at increased reduction temperatures due to in situ reduction by syngas during reaction. CO conversion increased with increasing reaction temperature, and selectivity to C5+ decreased with increasing reaction pressure and space velocity. At reaction temperatures up to of 300 °C, CO2 formation by the water–gas shift reaction was linearly correlated with the extent of CO conversion, and CO2 formation was slightly suppressed at ≥350 °C by a reverse water–gas shift reaction.
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Acknowledgment
The authors would like to acknowledge the useful comments and discussion of Dr. D.M. Dhar. This work was supported by the Technology Innovation Program (Project No. 10028400) funded by Korea Ministry of Knowledge Economy (MKE).
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Bae, J.W., Park, SJ., Lee, YJ. et al. Effects of Reaction Variables on Fischer–Tropsch Synthesis with Co-Precipitated K/FeCuAlO x Catalysts. Catal Lett 141, 799–807 (2011). https://doi.org/10.1007/s10562-011-0575-5
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DOI: https://doi.org/10.1007/s10562-011-0575-5