New Mechanism Insight for the Hydrogenation of CO/CO₂ Gas Mixtures to Hydrocarbons over Iron-Based Catalyst

Authors

Sandeep Badoga, University of Kentucky
Michela Martinelli, University of KentuckyFollow
Muthu Kumaran Gnanamani, University of KentuckyFollow
Young Koh, Asbury University
Wilson D. Shafer, Asbury University

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/g_cat). 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.

Document Type

Article

Publication Date

1-19-2021

Notes/Citation Information

Published in Catalysis Communications, v. 152, 106284.

© 2021 The Author(s)

This is an open access article under the CC BY license (https://creativecommons.org/licenses/by/4.0/).

Digital Object Identifier (DOI)

https://doi.org/10.1016/j.catcom.2021.106284

Funding Information

This work was supported by the Commonwealth of Kentucky.

Repository Citation

Badoga, Sandeep; Martinelli, Michela; Gnanamani, Muthu Kumaran; Koh, Young; and Shafer, Wilson D., "New Mechanism Insight for the Hydrogenation of CO/CO₂ Gas Mixtures to Hydrocarbons over Iron-Based Catalyst" (2021). Center for Applied Energy Research Faculty and Staff Publications. 38.
https://uknowledge.uky.edu/caer_facpub/38