Evaluation of MgO as a promoter for the hydrogenation of CO2 to long-chain hydrocarbons over Fe-based catalysts

Sheraz Ahmed; Muhammad Irshad; Wonjoong Yoon; Neha Karanwal; Junjung Rohmat Sugiarto; Muhammad Kashif Khan; Soek Ki Kim; Jaehoon Kim

doi:10.1016/j.apcatb.2023.123052

Evaluation of MgO as a promoter for the hydrogenation of CO₂ to long-chain hydrocarbons over Fe-based catalysts

Sheraz Ahmed
, Muhammad Irshad
, Wonjoong Yoon
, Neha Karanwal
, Junjung Rohmat Sugiarto
, Muhammad Kashif Khan
, Soek Ki Kim
, Jaehoon Kim

Department of Mechanical Engineering

Sungkyunkwan University
Ajou University

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

119 Scopus citations

Abstract

Thermocatalytic conversion of CO₂ into liquid fuels and chemicals is a promising approach to mitigate global warming. Although, the CO₂ conversion and long-chain hydrocarbon selectivity are highly dependent on the choice of metal-oxide promoter, but role of the promoter remains unclear. Herein, the role of MgO as a promoter for an Fe-based catalyst was investigated. Bimetallic Na-FeMgO_x catalyst exhibited a high C₅₊ yield of 25.1% with a CO₂ conversion of 49.1% at the early stage of the reaction. The presence of MgO facilitates the reduction of Fe oxides and formation of oxygen vacancies by transferring electrons to Fe-based phases. In addition, at the early stage of reaction, the decoration of the Mg oxide surface with nanosized χ-Fe₅C₂ enhances the C₅₊ yield. However, the progressive transformation of MgO to MgCO₃ during CO₂ conversion deactivates the Na-FeMgO_x catalyst. A detailed deactivation mechanism is also discussed.

Original language	English
Article number	123052
Journal	Applied Catalysis B: Environmental
Volume	338
DOIs	https://doi.org/10.1016/j.apcatb.2023.123052
State	Published - 5 Dec 2023

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 13 Climate Action

Keywords

CO hydrogenation
Deactivation
Fe catalyst
Fischer–Tropsch synthesis
Mg promotor

Access to Document

10.1016/j.apcatb.2023.123052

Cite this

@article{9c55ce68d2f540c38faa85fcdec9c414,

title = "Evaluation of MgO as a promoter for the hydrogenation of CO2 to long-chain hydrocarbons over Fe-based catalysts",

abstract = "Thermocatalytic conversion of CO2 into liquid fuels and chemicals is a promising approach to mitigate global warming. Although, the CO2 conversion and long-chain hydrocarbon selectivity are highly dependent on the choice of metal-oxide promoter, but role of the promoter remains unclear. Herein, the role of MgO as a promoter for an Fe-based catalyst was investigated. Bimetallic Na-FeMgOx catalyst exhibited a high C5+ yield of 25.1\% with a CO2 conversion of 49.1\% at the early stage of the reaction. The presence of MgO facilitates the reduction of Fe oxides and formation of oxygen vacancies by transferring electrons to Fe-based phases. In addition, at the early stage of reaction, the decoration of the Mg oxide surface with nanosized χ-Fe5C2 enhances the C5+ yield. However, the progressive transformation of MgO to MgCO3 during CO2 conversion deactivates the Na-FeMgOx catalyst. A detailed deactivation mechanism is also discussed.",

keywords = "CO hydrogenation, Deactivation, Fe catalyst, Fischer–Tropsch synthesis, Mg promotor",

author = "Sheraz Ahmed and Muhammad Irshad and Wonjoong Yoon and Neha Karanwal and Sugiarto, \{Junjung Rohmat\} and Khan, \{Muhammad Kashif\} and Kim, \{Soek Ki\} and Jaehoon Kim",

note = "Publisher Copyright: {\textcopyright} 2023 Elsevier B.V.",

year = "2023",

month = dec,

day = "5",

doi = "10.1016/j.apcatb.2023.123052",

language = "English",

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T1 - Evaluation of MgO as a promoter for the hydrogenation of CO2 to long-chain hydrocarbons over Fe-based catalysts

AU - Ahmed, Sheraz

AU - Irshad, Muhammad

AU - Yoon, Wonjoong

AU - Karanwal, Neha

AU - Sugiarto, Junjung Rohmat

AU - Khan, Muhammad Kashif

AU - Kim, Soek Ki

AU - Kim, Jaehoon

PY - 2023/12/5

Y1 - 2023/12/5

N2 - Thermocatalytic conversion of CO2 into liquid fuels and chemicals is a promising approach to mitigate global warming. Although, the CO2 conversion and long-chain hydrocarbon selectivity are highly dependent on the choice of metal-oxide promoter, but role of the promoter remains unclear. Herein, the role of MgO as a promoter for an Fe-based catalyst was investigated. Bimetallic Na-FeMgOx catalyst exhibited a high C5+ yield of 25.1% with a CO2 conversion of 49.1% at the early stage of the reaction. The presence of MgO facilitates the reduction of Fe oxides and formation of oxygen vacancies by transferring electrons to Fe-based phases. In addition, at the early stage of reaction, the decoration of the Mg oxide surface with nanosized χ-Fe5C2 enhances the C5+ yield. However, the progressive transformation of MgO to MgCO3 during CO2 conversion deactivates the Na-FeMgOx catalyst. A detailed deactivation mechanism is also discussed.

AB - Thermocatalytic conversion of CO2 into liquid fuels and chemicals is a promising approach to mitigate global warming. Although, the CO2 conversion and long-chain hydrocarbon selectivity are highly dependent on the choice of metal-oxide promoter, but role of the promoter remains unclear. Herein, the role of MgO as a promoter for an Fe-based catalyst was investigated. Bimetallic Na-FeMgOx catalyst exhibited a high C5+ yield of 25.1% with a CO2 conversion of 49.1% at the early stage of the reaction. The presence of MgO facilitates the reduction of Fe oxides and formation of oxygen vacancies by transferring electrons to Fe-based phases. In addition, at the early stage of reaction, the decoration of the Mg oxide surface with nanosized χ-Fe5C2 enhances the C5+ yield. However, the progressive transformation of MgO to MgCO3 during CO2 conversion deactivates the Na-FeMgOx catalyst. A detailed deactivation mechanism is also discussed.

KW - CO hydrogenation

KW - Deactivation

KW - Fe catalyst

KW - Fischer–Tropsch synthesis

KW - Mg promotor

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DO - 10.1016/j.apcatb.2023.123052

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