TY - JOUR
T1 - New mechanism insight for the hydrogenation of CO/CO2 gas mixtures to hydrocarbons over iron-based catalyst
AU - Badoga, Sandeep
AU - Martinelli, Michela
AU - Gnanamani, Muthu Kumaran
AU - Koh, Young
AU - Shafer, Wilson D.
N1 - Publisher Copyright:
© 2021 The Author(s)
PY - 2021/4
Y1 - 2021/4
N2 - 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.
AB - 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.
KW - C-labelled CO
KW - CO hydrogenation
KW - CO-rich syngas
KW - Fischer-Tropsch
KW - FTS mechanism
KW - Iron catalyst
UR - http://www.scopus.com/inward/record.url?scp=85100034377&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85100034377&partnerID=8YFLogxK
U2 - 10.1016/j.catcom.2021.106284
DO - 10.1016/j.catcom.2021.106284
M3 - Article
AN - SCOPUS:85100034377
SN - 1566-7367
VL - 152
JO - Catalysis Communications
JF - Catalysis Communications
M1 - 106284
ER -