Time-Resolved Synchrotron Powder X-ray Diffraction Studies on the Synthesis of Li8SiO6 and Its Reaction with CO2

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Time-Resolved Synchrotron Powder X-ray Diffraction Studies on the Synthesis of Li8SiO6 and Its Reaction with CO2. / Cova, Federico; Amica, Guillermina; Kohopää, Katja; Blanco, Maria Valeria.

julkaisussa: Inorganic Chemistry, Vuosikerta 58, Nro 2, 22.01.2019, s. 1040-1047.

Tutkimustuotos: Lehtiartikkeli

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Cova, Federico ; Amica, Guillermina ; Kohopää, Katja ; Blanco, Maria Valeria. / Time-Resolved Synchrotron Powder X-ray Diffraction Studies on the Synthesis of Li8SiO6 and Its Reaction with CO2. Julkaisussa: Inorganic Chemistry. 2019 ; Vuosikerta 58, Nro 2. Sivut 1040-1047.

Bibtex - Lataa

@article{dca72de0cfa145a79d8dfb2dd7f4f337,
title = "Time-Resolved Synchrotron Powder X-ray Diffraction Studies on the Synthesis of Li8SiO6 and Its Reaction with CO2",
abstract = "Lithium oxosilicate was synthesized via the solid-state method using Li2O and SiO2 as starting reactants. In situ synchrotron powder X-ray diffraction (SPRXD) coupled with Rietveld refinement allowed describing the synthesis as a two-step process where Li2O and SiO2 react to form Li4SiO4 and, at higher temperatures, lithium orthosilicate reacts with the remaining Li2O to form Li8SiO6. Time-resolved measurements allowed determining the temperatures at which each phase transformation occurs as well as the time required to complete the synthesis. The CO2 capture properties of Li8SiO6 in the temperature range from room temperature to 770 °C were studied in detail by time-resolved in situ SPXRD. The crystallographic phases present during Li8SiO6 carbonation were identified and quantified via Rietveld analysis. Results showed that, within the temperature range from 200 to 690 °C, Li8SiO6 carbonation produces Li4SiO4 and Li2CO3, while, at temperatures from 690 to 750 °C, a secondary reaction occurs, where previously formed Li4SiO4 reacts with CO2, producing Li2SiO3 and Li2CO3. These findings allowed proposing a mechanism of reaction for Li8SiO6 carbonation in the temperature range that is of interest for high temperature solid-state sorbents.",
author = "Federico Cova and Guillermina Amica and Katja Kohop{\"a}{\"a} and Blanco, {Maria Valeria}",
year = "2019",
month = "1",
day = "22",
doi = "10.1021/acs.inorgchem.8b01297",
language = "English",
volume = "58",
pages = "1040--1047",
journal = "Inorganic Chemistry",
issn = "0020-1669",
publisher = "AMERICAN CHEMICAL SOCIETY",
number = "2",

}

RIS - Lataa

TY - JOUR

T1 - Time-Resolved Synchrotron Powder X-ray Diffraction Studies on the Synthesis of Li8SiO6 and Its Reaction with CO2

AU - Cova, Federico

AU - Amica, Guillermina

AU - Kohopää, Katja

AU - Blanco, Maria Valeria

PY - 2019/1/22

Y1 - 2019/1/22

N2 - Lithium oxosilicate was synthesized via the solid-state method using Li2O and SiO2 as starting reactants. In situ synchrotron powder X-ray diffraction (SPRXD) coupled with Rietveld refinement allowed describing the synthesis as a two-step process where Li2O and SiO2 react to form Li4SiO4 and, at higher temperatures, lithium orthosilicate reacts with the remaining Li2O to form Li8SiO6. Time-resolved measurements allowed determining the temperatures at which each phase transformation occurs as well as the time required to complete the synthesis. The CO2 capture properties of Li8SiO6 in the temperature range from room temperature to 770 °C were studied in detail by time-resolved in situ SPXRD. The crystallographic phases present during Li8SiO6 carbonation were identified and quantified via Rietveld analysis. Results showed that, within the temperature range from 200 to 690 °C, Li8SiO6 carbonation produces Li4SiO4 and Li2CO3, while, at temperatures from 690 to 750 °C, a secondary reaction occurs, where previously formed Li4SiO4 reacts with CO2, producing Li2SiO3 and Li2CO3. These findings allowed proposing a mechanism of reaction for Li8SiO6 carbonation in the temperature range that is of interest for high temperature solid-state sorbents.

AB - Lithium oxosilicate was synthesized via the solid-state method using Li2O and SiO2 as starting reactants. In situ synchrotron powder X-ray diffraction (SPRXD) coupled with Rietveld refinement allowed describing the synthesis as a two-step process where Li2O and SiO2 react to form Li4SiO4 and, at higher temperatures, lithium orthosilicate reacts with the remaining Li2O to form Li8SiO6. Time-resolved measurements allowed determining the temperatures at which each phase transformation occurs as well as the time required to complete the synthesis. The CO2 capture properties of Li8SiO6 in the temperature range from room temperature to 770 °C were studied in detail by time-resolved in situ SPXRD. The crystallographic phases present during Li8SiO6 carbonation were identified and quantified via Rietveld analysis. Results showed that, within the temperature range from 200 to 690 °C, Li8SiO6 carbonation produces Li4SiO4 and Li2CO3, while, at temperatures from 690 to 750 °C, a secondary reaction occurs, where previously formed Li4SiO4 reacts with CO2, producing Li2SiO3 and Li2CO3. These findings allowed proposing a mechanism of reaction for Li8SiO6 carbonation in the temperature range that is of interest for high temperature solid-state sorbents.

UR - http://www.scopus.com/inward/record.url?scp=85060035742&partnerID=8YFLogxK

U2 - 10.1021/acs.inorgchem.8b01297

DO - 10.1021/acs.inorgchem.8b01297

M3 - Article

VL - 58

SP - 1040

EP - 1047

JO - Inorganic Chemistry

JF - Inorganic Chemistry

SN - 0020-1669

IS - 2

ER -

ID: 31641515