The effect of crystal plane on Fe<sub>3</sub>O<sub>4</sub> carbonization

LI Si-qi; WEI Xu-song; WANG Hong; QING Ming; SUO Hai-yun; LÜ Zhen-gang; GUO Hui-chuang; LIU Ying; YU Xin; YANG Yong; LI Yong-wang

doi:10.19906/j.cnki.JFCT.2023017

Volume 51 Issue 9

Sep. 2023

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Article Navigation > Journal of Fuel Chemistry and Technology > 2023 > 51(9): 1282-1290

LI Si-qi, WEI Xu-song, WANG Hong, QING Ming, SUO Hai-yun, LÜ Zhen-gang, GUO Hui-chuang, LIU Ying, YU Xin, YANG Yong, LI Yong-wang. The effect of crystal plane on Fe3O4 carbonization[J]. Journal of Fuel Chemistry and Technology, 2023, 51(9): 1282-1290. doi: 10.19906/j.cnki.JFCT.2023017

Citation:

LI Si-qi, WEI Xu-song, WANG Hong, QING Ming, SUO Hai-yun, LÜ Zhen-gang, GUO Hui-chuang, LIU Ying, YU Xin, YANG Yong, LI Yong-wang. The effect of crystal plane on Fe₃O₄ carbonization[J]. Journal of Fuel Chemistry and Technology, 2023, 51(9): 1282-1290. doi: 10.19906/j.cnki.JFCT.2023017

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The effect of crystal plane on Fe₃O₄ carbonization

doi: 10.19906/j.cnki.JFCT.2023017

LI Si-qi^{1, 2
,},
WEI Xu-song^{1, 2},
WANG Hong^3
,,
QING Ming^3
,,
SUO Hai-yun^3
,,
LÜ Zhen-gang^3
,,
GUO Hui-chuang^3
,,
LIU Ying^3
,,
YU Xin^{1, 3
,
,},
YANG Yong^{1, 3
,
,},
LI Yong-wang^{1, 3
,}

1.
State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
2.
University of Chinese Academy of Sciences, Beijing 100049, China
3.
National Energy Center for Coal to Liquids, Synfuels China Co. Ltd. , Beijing 101407, China

Funds: The project was supported by the National Natural Science Foundation of China (21972162 and 22025804) and Jungar Banner Important Science & Technology Specific Projects (2022ZD-03)

Received Date: 2022-10-28
Accepted Date: 2022-12-13
Rev Recd Date: 2022-12-11

Available Online: 2023-01-10

Publish Date: 2023-09-30

Abstract

Abstract

In the Fischer-Tropsch synthesis reaction, Fe-based catalysts are widely used in large-scale indirect coal liquefaction industry due to their low price, high activity, and low CH₄ selectivity. The catalytic performance is closely related to the catalyst particle size, surface structure and composition. Since reductive carbonization is a key step in the activation of iron-based catalysts, in this work, Fe₃O₄-O (expose the {111} crystal planes) with different particle size, and similar particle size but exposing different crystal planes, {111} and {110} (Fe₃O₄-RD), have been prepared to explore the effect of particle size and surface structure on the carbonization process. The results show that the 50 nm Fe₃O₄-O particles change more significantly than the one with large particle size (2–10 μm) after carbonization. In-situ XRD was used to monitor the phase change of Fe₃O₄ with exposing different surface planes during carbonization. The results show that 150 nm Fe₃O₄-O and Fe₃O₄-RD particles behave differently in carbonization rate and have different iron carbide concentration in the end, which indicates the carbonization process can be affected by exposed crystal planes. TEM analysis reveals that Fe₃O₄@Fe_xC core-shell structure formed after carbonization.
- Fe₃O₄,
- crystal plane effect,
- in-situ XRD,
- carbonization

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References(28)

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