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Open AccessArticle

Selective CO Hydrogenation Over Bimetallic Co-Fe Catalysts for the Production of Light Paraffin Hydrocarbons (C2–C4): Effect of Space Velocity, Reaction Pressure and Temperature

1
Research Institute of Advanced Energy Technology, Kyungpook National University, Daegu 41566, Korea
2
Department of Chemical Engineering, Kyungpook National University, Daegu 41566, Korea
3
Institute for Advanced Engineering, Yongin 41718, Korea
4
Research Institute of Industrial Science and Technology, Pohang 37673, Korea
*
Authors to whom correspondence should be addressed.
Seong Bin Jo and Tae young Kim contributed equally to this work.
Catalysts 2019, 9(9), 779; https://doi.org/10.3390/catal9090779
Received: 6 August 2019 / Revised: 29 August 2019 / Accepted: 16 September 2019 / Published: 19 September 2019
(This article belongs to the Special Issue Iron and Cobalt Catalysts)
Synthetic natural gas (SNG) using syngas from coal and biomass has attracted much attention as a potential substitute for fossil fuels because of environmental advantages. However, heating value of SNG is below the standard heating value for power generation (especially in South Korea and Japan). In this study, bimetallic Co-Fe catalyst was developed for the production of light paraffin hydrocarbons (C2–C4 as well as CH4) for usage as mixing gases to improve the heating value of SNG. The catalytic performance was monitored by varying space velocity, reaction pressure and temperature. The CO conversion increases with decrease in space velocities, and with an increase in reaction pressure and temperature. CH4 yield increases and C2+ yield decreases with increasing reaction temperature at all reaction pressure and space velocities. In addition, improved CH4 yield at higher reaction pressure (20 bar) implies that higher reaction pressure is a favorable condition for secondary CO2 methanation reaction. The bimetallic Co-Fe catalyst showed the best results with 99.7% CO conversion, 36.1% C2–C4 yield and 0.90 paraffin ratio at H2/CO of 3.0, space velocity of 4000 mL/g/h, reaction pressure of 20 bar, and temperature of 350 °C. View Full-Text
Keywords: Synthetic natural gas (SNG); Cobalt; Iron; Fischer-Tropsch synthesis; C2–C4 hydrocarbons; paraffin ratio Synthetic natural gas (SNG); Cobalt; Iron; Fischer-Tropsch synthesis; C2–C4 hydrocarbons; paraffin ratio
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Jo, S.B.; Kim, T.Y.; Lee, C.H.; Woo, J.H.; Chae, H.J.; Kang, S.-H.; Kim, J.W.; Lee, S.C.; Kim, J.C. Selective CO Hydrogenation Over Bimetallic Co-Fe Catalysts for the Production of Light Paraffin Hydrocarbons (C2–C4): Effect of Space Velocity, Reaction Pressure and Temperature. Catalysts 2019, 9, 779.

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