Low temperature solid state synthesis of Li5FeO4 and CO2 capture mechanism via real time in situsynchrotron X-ray diffraction

María Valeria Blanco; Katja Kohopää; Irina Snigireva; Federico Cova

doi:10.1016/j.cej.2018.08.017

Low temperature solid state synthesis of Li₅FeO₄ and CO₂ capture mechanism via real time in situsynchrotron X-ray diffraction

María Valeria Blanco^*, Katja Kohopää, Irina Snigireva, Federico Cova

^*Corresponding author for this work

Department of Applied Physics

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

29 Citations (Scopus)

Abstract

Li₅FeO₄ was successfully synthesized via solid-state reaction using Li₂O and Fe₃O₄ as precursors. The use of the proposed reactants allowed to lower the synthesis temperature to 430 °C. Li₅FeO₄ formation was found to be a two-step process, where the starting oxides partially react to produce LiFe₅O₈ and then LiFe₅O₈ reacts with Li₂O to form Li₅FeO₄. The CO₂ sorption properties of Li₅FeO₄ were investigated in the temperature range from room temperature to 750 °C. Time-resolved in situ high temperature synchrotron X-ray diffraction measurements coupled with Rietveld analysis showed that Li₅FeO₄ carbonation produces LiFeO₂ and Li₂CO₃, and revealed a secondary reversible reaction occurring between 350 °C and 550 °C, in which LiFeO₂ captures CO₂ producing Li₂CO₃ and Fe₂O₃. The experimental results allowed to propose the mechanism of reaction for Li₅FeO₄ carbonation process.

Original language	English
Pages (from-to)	370-377
Number of pages	8
Journal	Chemical Engineering Journal
Volume	354
DOIs	https://doi.org/10.1016/j.cej.2018.08.017
Publication status	Published - 15 Dec 2018
MoE publication type	A1 Journal article-refereed

Keywords

CO capture
LiFeO
Mechanism
Synthesis
X-ray diffraction

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10.1016/j.cej.2018.08.017

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@article{0baed3cd663e43deb68287a7df6998d8,

title = "Low temperature solid state synthesis of Li5FeO4 and CO2 capture mechanism via real time in situsynchrotron X-ray diffraction",

abstract = "Li5FeO4 was successfully synthesized via solid-state reaction using Li2O and Fe3O4 as precursors. The use of the proposed reactants allowed to lower the synthesis temperature to 430 °C. Li5FeO4 formation was found to be a two-step process, where the starting oxides partially react to produce LiFe5O8 and then LiFe5O8 reacts with Li2O to form Li5FeO4. The CO2 sorption properties of Li5FeO4 were investigated in the temperature range from room temperature to 750 °C. Time-resolved in situ high temperature synchrotron X-ray diffraction measurements coupled with Rietveld analysis showed that Li5FeO4 carbonation produces LiFeO2 and Li2CO3, and revealed a secondary reversible reaction occurring between 350 °C and 550 °C, in which LiFeO2 captures CO2 producing Li2CO3 and Fe2O3. The experimental results allowed to propose the mechanism of reaction for Li5FeO4 carbonation process.",

keywords = "CO capture, LiFeO, Mechanism, Synthesis, X-ray diffraction",

author = "Blanco, {Mar{\'i}a Valeria} and Katja Kohop{\"a}{\"a} and Irina Snigireva and Federico Cova",

year = "2018",

month = dec,

day = "15",

doi = "10.1016/j.cej.2018.08.017",

language = "English",

volume = "354",

pages = "370--377",

journal = "Chemical Engineering Journal",

issn = "1385-8947",

publisher = "Elsevier",

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TY - JOUR

T1 - Low temperature solid state synthesis of Li5FeO4 and CO2 capture mechanism via real time in situsynchrotron X-ray diffraction

AU - Blanco, María Valeria

AU - Kohopää, Katja

AU - Snigireva, Irina

AU - Cova, Federico

PY - 2018/12/15

Y1 - 2018/12/15

N2 - Li5FeO4 was successfully synthesized via solid-state reaction using Li2O and Fe3O4 as precursors. The use of the proposed reactants allowed to lower the synthesis temperature to 430 °C. Li5FeO4 formation was found to be a two-step process, where the starting oxides partially react to produce LiFe5O8 and then LiFe5O8 reacts with Li2O to form Li5FeO4. The CO2 sorption properties of Li5FeO4 were investigated in the temperature range from room temperature to 750 °C. Time-resolved in situ high temperature synchrotron X-ray diffraction measurements coupled with Rietveld analysis showed that Li5FeO4 carbonation produces LiFeO2 and Li2CO3, and revealed a secondary reversible reaction occurring between 350 °C and 550 °C, in which LiFeO2 captures CO2 producing Li2CO3 and Fe2O3. The experimental results allowed to propose the mechanism of reaction for Li5FeO4 carbonation process.

AB - Li5FeO4 was successfully synthesized via solid-state reaction using Li2O and Fe3O4 as precursors. The use of the proposed reactants allowed to lower the synthesis temperature to 430 °C. Li5FeO4 formation was found to be a two-step process, where the starting oxides partially react to produce LiFe5O8 and then LiFe5O8 reacts with Li2O to form Li5FeO4. The CO2 sorption properties of Li5FeO4 were investigated in the temperature range from room temperature to 750 °C. Time-resolved in situ high temperature synchrotron X-ray diffraction measurements coupled with Rietveld analysis showed that Li5FeO4 carbonation produces LiFeO2 and Li2CO3, and revealed a secondary reversible reaction occurring between 350 °C and 550 °C, in which LiFeO2 captures CO2 producing Li2CO3 and Fe2O3. The experimental results allowed to propose the mechanism of reaction for Li5FeO4 carbonation process.

KW - CO capture

KW - LiFeO

KW - Mechanism

KW - Synthesis

KW - X-ray diffraction

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U2 - 10.1016/j.cej.2018.08.017

DO - 10.1016/j.cej.2018.08.017

M3 - Article

AN - SCOPUS:85051382737

SN - 1385-8947

VL - 354

SP - 370

EP - 377

JO - Chemical Engineering Journal

JF - Chemical Engineering Journal

ER -

Low temperature solid state synthesis of Li₅FeO₄ and CO₂ capture mechanism via real time in situsynchrotron X-ray diffraction

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Keywords

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