Studies on the thermal decomposition of lanthanum(III) valerate and lanthanum(III) caproate in argon

Jean-Claude Grivel; Zhao Yue; Maria Josefina Suarez Guevara; A. Watenphul

doi:10.1016/j.tca.2015.05.002

Studies on the thermal decomposition of lanthanum(III) valerate and lanthanum(III) caproate in argon

Jean-Claude Grivel, Zhao Yue, Maria Josefina Suarez Guevara, A. Watenphul

Department of Energy Conversion and Storage

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

The decomposition of La-valerate (La(C4H9CO2)3·xH2O (x ≈ 0.45)) and La-caproate (La(C5H11CO2)3·xH2O (x ≈ 0.30)) was studied upon heating at 5 C/min in a flow of argon. Using a variety of techniques including simultaneous TG-DTA, FTIR, X-ray diffraction with both laboratory Cu Kα and synchrotron sources as well as hot-stage microscopy, it was found that both compounds melt prior to decomposition and that the main decomposition stage from the molten, anhydrous state leads to the formation of La-dioxycarbonate (La2O2CO3) via an unstable intermediate product and release of symmetrical ketones. Final decomposition to La2O3 takes place with release of CO2.

Original language	English
Journal	Thermochimica Acta
Volume	612
Pages (from-to)	1-9
Number of pages	9
ISSN	0040-6031
DOIs	https://doi.org/10.1016/j.tca.2015.05.002
Publication status	Published - 2015

Keywords

Caproate
FTIR
Lanthanum
Simultaneous TG-DTA
Thermal decomposition
Valerate
Decomposition
Differential thermal analysis
Ketones
Pyrolysis
X ray diffraction
Hot-stage microscopy
Intermediate product
Lanthanum(III)
Synchrotron source

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@article{ae17fc29b706457a9c50da253eac5166,

title = "Studies on the thermal decomposition of lanthanum(III) valerate and lanthanum(III) caproate in argon",

abstract = "The decomposition of La-valerate (La(C4H9CO2)3·xH2O (x ≈ 0.45)) and La-caproate (La(C5H11CO2)3·xH2O (x ≈ 0.30)) was studied upon heating at 5 C/min in a flow of argon. Using a variety of techniques including simultaneous TG-DTA, FTIR, X-ray diffraction with both laboratory Cu Kα and synchrotron sources as well as hot-stage microscopy, it was found that both compounds melt prior to decomposition and that the main decomposition stage from the molten, anhydrous state leads to the formation of La-dioxycarbonate (La2O2CO3) via an unstable intermediate product and release of symmetrical ketones. Final decomposition to La2O3 takes place with release of CO2.",

keywords = "Caproate, FTIR, Lanthanum, Simultaneous TG-DTA, Thermal decomposition, Valerate, Decomposition, Differential thermal analysis, Ketones, Pyrolysis, X ray diffraction, Hot-stage microscopy, Intermediate product, Lanthanum(III), Synchrotron source",

author = "Jean-Claude Grivel and Zhao Yue and {Suarez Guevara}, {Maria Josefina} and A. Watenphul",

year = "2015",

doi = "10.1016/j.tca.2015.05.002",

language = "English",

volume = "612",

pages = "1--9",

journal = "Thermochimica Acta",

issn = "0040-6031",

publisher = "Elsevier",

}

TY - JOUR

T1 - Studies on the thermal decomposition of lanthanum(III) valerate and lanthanum(III) caproate in argon

AU - Grivel, Jean-Claude

AU - Yue, Zhao

AU - Suarez Guevara, Maria Josefina

AU - Watenphul, A.

PY - 2015

Y1 - 2015

N2 - The decomposition of La-valerate (La(C4H9CO2)3·xH2O (x ≈ 0.45)) and La-caproate (La(C5H11CO2)3·xH2O (x ≈ 0.30)) was studied upon heating at 5 C/min in a flow of argon. Using a variety of techniques including simultaneous TG-DTA, FTIR, X-ray diffraction with both laboratory Cu Kα and synchrotron sources as well as hot-stage microscopy, it was found that both compounds melt prior to decomposition and that the main decomposition stage from the molten, anhydrous state leads to the formation of La-dioxycarbonate (La2O2CO3) via an unstable intermediate product and release of symmetrical ketones. Final decomposition to La2O3 takes place with release of CO2.

AB - The decomposition of La-valerate (La(C4H9CO2)3·xH2O (x ≈ 0.45)) and La-caproate (La(C5H11CO2)3·xH2O (x ≈ 0.30)) was studied upon heating at 5 C/min in a flow of argon. Using a variety of techniques including simultaneous TG-DTA, FTIR, X-ray diffraction with both laboratory Cu Kα and synchrotron sources as well as hot-stage microscopy, it was found that both compounds melt prior to decomposition and that the main decomposition stage from the molten, anhydrous state leads to the formation of La-dioxycarbonate (La2O2CO3) via an unstable intermediate product and release of symmetrical ketones. Final decomposition to La2O3 takes place with release of CO2.

KW - Caproate

KW - FTIR

KW - Lanthanum

KW - Simultaneous TG-DTA

KW - Thermal decomposition

KW - Valerate

KW - Decomposition

KW - Differential thermal analysis

KW - Ketones

KW - Pyrolysis

KW - X ray diffraction

KW - Hot-stage microscopy

KW - Intermediate product

KW - Lanthanum(III)

KW - Synchrotron source

U2 - 10.1016/j.tca.2015.05.002

DO - 10.1016/j.tca.2015.05.002

M3 - Journal article

VL - 612

SP - 1

EP - 9

JO - Thermochimica Acta

JF - Thermochimica Acta

SN - 0040-6031

ER -