Abstract
Iron-based catalysts are the most suitable candidates for converting CO2 or CO2-rich syngas to hydrocarbons. However, several issues about the mechanism of CO2 hydrogenation are still unclear. In this work, we investigated the performance of an iron-based catalyst with H2/CO2, H2/CO/N2 and H2/CO/13CO2/N2 gas mixtures at the same process conditions (T = 270°C, P = 175 psi and SV = 3 NL/h/gcat). The CO2 hydrogenation rate was much lower than that observed for CO hydrogenation. 13CO2 tracer experiments indicated that CO2 is hydrogenated to hydrocarbons via the reverse water-gas shift even when present in small concentration (1.8 vol%). 13C enrichment was observed in both CO and C1-C4 hydrocarbons.
Original language | English |
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Article number | 106284 |
Journal | Catalysis Communications |
Volume | 152 |
DOIs | |
State | Published - Apr 2021 |
Bibliographical note
Publisher Copyright:© 2021 The Author(s)
Keywords
- C-labelled CO
- CO hydrogenation
- CO-rich syngas
- Fischer-Tropsch
- FTS mechanism
- Iron catalyst
ASJC Scopus subject areas
- Catalysis
- Chemistry (all)
- Process Chemistry and Technology