Hydrogenation of carbon dioxide over iron carbide prepared from alkali metal promoted iron oxalate

Muthu Kumaran Gnanamani; Hussein H. Hamdeh; Wilson D. Shafer; Shelley D. Hopps; Burtron H. Davis

doi:10.1016/j.apcata.2018.07.034

Hydrogenation of carbon dioxide over iron carbide prepared from alkali metal promoted iron oxalate

Muthu Kumaran Gnanamani, Hussein H. Hamdeh, Wilson D. Shafer, Shelley D. Hopps, Burtron H. Davis

Center for Applied Energy Research (CAER)

Research output: Contribution to journal › Article › peer-review

45 Scopus citations

Abstract

Iron carbide was prepared by the carburization of iron oxalate doped with various alkali metals in flowing CO at 400 °C. The addition of alkali metal (Li, Na, K, Rb or Cs) to iron oxalate was found to decrease the bulk iron carbides formation. However, the amount of carbon deposited on Fe as inferred from temperature programmed hydrogenation and high-resolution transmission electron microscopic studies show an increasing trend with the increase of the basicity of alkali added. The CO₂ and H₂ conversions of all alkali doped iron catalysts were initially higher but they declined over time irrespective of alkali. The benefits of addition of alkali to iron without any structural and reduction promoters, such as copper, is found to lower the selectivity for methane, higher olefins and oxygenates formation for CO₂ hydrogenation.

Original language	English
Pages (from-to)	243-249
Number of pages	7
Journal	Applied Catalysis A: General
Volume	564
DOIs	https://doi.org/10.1016/j.apcata.2018.07.034
State	Published - Aug 25 2018

Bibliographical note

Funding Information:
The authors gratefully acknowledge the financial support of this work by the Commonwealth of Kentucky . We would like to thank Dr. Dali Qian, CAER, University of Kentucky for assisting with TEM analyses.

Publisher Copyright:
© 2018 Elsevier B.V.

Keywords

Alkali metal
Carbon dioxide
Hydrogenation
Iron carbide
Iron oxalate

ASJC Scopus subject areas

Catalysis
Process Chemistry and Technology

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10.1016/j.apcata.2018.07.034

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title = "Hydrogenation of carbon dioxide over iron carbide prepared from alkali metal promoted iron oxalate",

abstract = "Iron carbide was prepared by the carburization of iron oxalate doped with various alkali metals in flowing CO at 400 °C. The addition of alkali metal (Li, Na, K, Rb or Cs) to iron oxalate was found to decrease the bulk iron carbides formation. However, the amount of carbon deposited on Fe as inferred from temperature programmed hydrogenation and high-resolution transmission electron microscopic studies show an increasing trend with the increase of the basicity of alkali added. The CO2 and H2 conversions of all alkali doped iron catalysts were initially higher but they declined over time irrespective of alkali. The benefits of addition of alkali to iron without any structural and reduction promoters, such as copper, is found to lower the selectivity for methane, higher olefins and oxygenates formation for CO2 hydrogenation.",

keywords = "Alkali metal, Carbon dioxide, Hydrogenation, Iron carbide, Iron oxalate",

author = "Gnanamani, {Muthu Kumaran} and Hamdeh, {Hussein H.} and Shafer, {Wilson D.} and Hopps, {Shelley D.} and Davis, {Burtron H.}",

note = "Funding Information: The authors gratefully acknowledge the financial support of this work by the Commonwealth of Kentucky . We would like to thank Dr. Dali Qian, CAER, University of Kentucky for assisting with TEM analyses. Publisher Copyright: {\textcopyright} 2018 Elsevier B.V.",

year = "2018",

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doi = "10.1016/j.apcata.2018.07.034",

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AU - Gnanamani, Muthu Kumaran

AU - Hamdeh, Hussein H.

AU - Shafer, Wilson D.

AU - Hopps, Shelley D.

AU - Davis, Burtron H.

N1 - Funding Information: The authors gratefully acknowledge the financial support of this work by the Commonwealth of Kentucky . We would like to thank Dr. Dali Qian, CAER, University of Kentucky for assisting with TEM analyses. Publisher Copyright: © 2018 Elsevier B.V.

PY - 2018/8/25

Y1 - 2018/8/25

N2 - Iron carbide was prepared by the carburization of iron oxalate doped with various alkali metals in flowing CO at 400 °C. The addition of alkali metal (Li, Na, K, Rb or Cs) to iron oxalate was found to decrease the bulk iron carbides formation. However, the amount of carbon deposited on Fe as inferred from temperature programmed hydrogenation and high-resolution transmission electron microscopic studies show an increasing trend with the increase of the basicity of alkali added. The CO2 and H2 conversions of all alkali doped iron catalysts were initially higher but they declined over time irrespective of alkali. The benefits of addition of alkali to iron without any structural and reduction promoters, such as copper, is found to lower the selectivity for methane, higher olefins and oxygenates formation for CO2 hydrogenation.

AB - Iron carbide was prepared by the carburization of iron oxalate doped with various alkali metals in flowing CO at 400 °C. The addition of alkali metal (Li, Na, K, Rb or Cs) to iron oxalate was found to decrease the bulk iron carbides formation. However, the amount of carbon deposited on Fe as inferred from temperature programmed hydrogenation and high-resolution transmission electron microscopic studies show an increasing trend with the increase of the basicity of alkali added. The CO2 and H2 conversions of all alkali doped iron catalysts were initially higher but they declined over time irrespective of alkali. The benefits of addition of alkali to iron without any structural and reduction promoters, such as copper, is found to lower the selectivity for methane, higher olefins and oxygenates formation for CO2 hydrogenation.

KW - Alkali metal

KW - Carbon dioxide

KW - Hydrogenation

KW - Iron carbide

KW - Iron oxalate

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M3 - Article

AN - SCOPUS:85050859183

SN - 0926-860X

VL - 564

SP - 243

EP - 249

JO - Applied Catalysis A: General

JF - Applied Catalysis A: General

ER -

Hydrogenation of carbon dioxide over iron carbide prepared from alkali metal promoted iron oxalate

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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