New mechanism insight for the hydrogenation of CO/CO2 gas mixtures to hydrocarbons over iron-based catalyst

Sandeep Badoga, Michela Martinelli, Muthu Kumaran Gnanamani, Young Koh, Wilson D. Shafer

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

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 languageEnglish
Article number106284
JournalCatalysis Communications
Volume152
DOIs
StatePublished - 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
  • General Chemistry
  • Process Chemistry and Technology

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