Thermal analysis in oxidative and pyrolysis conditions of alkaline earth metals picolinates using the techniques: TG-DSC, DSC, MWTA, HSM and EGA (TG-DSC-FTIR and HSM-MS)

A. L.C.S. Nascimento, G. M.B. Parkes, G. P. Ashton, R. P. Fernandes, J. A. Teixeira, W. D.G. Nunes, M. Ionashiro, F. J. Caires

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Synthesis, characterization, thermal stability and pyrolysis of some alkaline earth picolinates M(C6H5NO2)2⋅nH2O (where M = Mg(II), Ca(II), Sr(II) and Ba(II) and n = di (Mg), mono (Ca), hemi three (Sr) hydrated) were investigated using a range of techniques including simultaneous thermogravimetry and differential scanning calorimetry (TG–DSC), evolved gas analysis (EGA), differential scanning calorimetry (DSC), Hot-Stage microscopy (HSM), powder X-ray diffractometry (PXRD), complexometry with EDTA and elemental analysis (EA). The TG-DSC curves show that the hydrated compounds dehydrate in a single step of mass loss and the thermal stability of the anhydrous compound is little influenced from the atmosphere used. On the other hand, the mechanisms of thermal decomposition are profoundly influenced by the atmosphere used, as can also be observed in the EGA data. In addition, a comparison between two calorimetric techniques, Microwave Thermal Analysis (MWTA) and DSC, was made which showed similar profiles. Two evolved gas analysis (EGA) techniques: TG-DSC coupled to FTIR and HSM coupled to a quadrupole mass spectrometer (MS) were also used to provide additional information about the pyrolysis mechanism.

LanguageEnglish
Pages67-75
Number of pages9
JournalJournal of Analytical and Applied Pyrolysis
Volume135
Early online date24 Sep 2018
DOIs
Publication statusPublished - 1 Oct 2018

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Alkaline Earth Metals
Alkaline earth metals
Gas fuel analysis
Mass spectrometers
Thermoanalysis
Differential scanning calorimetry
Microscopic examination
Pyrolysis
Microwaves
Thermodynamic stability
Ethylenediaminetetraacetic acid
Edetic Acid
Powders
X ray diffraction analysis
Thermogravimetric analysis
Earth (planet)
Chemical analysis

Cite this

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title = "Thermal analysis in oxidative and pyrolysis conditions of alkaline earth metals picolinates using the techniques: TG-DSC, DSC, MWTA, HSM and EGA (TG-DSC-FTIR and HSM-MS)",
abstract = "Synthesis, characterization, thermal stability and pyrolysis of some alkaline earth picolinates M(C6H5NO2)2⋅nH2O (where M = Mg(II), Ca(II), Sr(II) and Ba(II) and n = di (Mg), mono (Ca), hemi three (Sr) hydrated) were investigated using a range of techniques including simultaneous thermogravimetry and differential scanning calorimetry (TG–DSC), evolved gas analysis (EGA), differential scanning calorimetry (DSC), Hot-Stage microscopy (HSM), powder X-ray diffractometry (PXRD), complexometry with EDTA and elemental analysis (EA). The TG-DSC curves show that the hydrated compounds dehydrate in a single step of mass loss and the thermal stability of the anhydrous compound is little influenced from the atmosphere used. On the other hand, the mechanisms of thermal decomposition are profoundly influenced by the atmosphere used, as can also be observed in the EGA data. In addition, a comparison between two calorimetric techniques, Microwave Thermal Analysis (MWTA) and DSC, was made which showed similar profiles. Two evolved gas analysis (EGA) techniques: TG-DSC coupled to FTIR and HSM coupled to a quadrupole mass spectrometer (MS) were also used to provide additional information about the pyrolysis mechanism.",
keywords = "Alkaline earth picolinates, HSM-MS, Microwave thermal analysis (MWTA), TG-DSC-FTIR",
author = "Nascimento, {A. L.C.S.} and Parkes, {G. M.B.} and Ashton, {G. P.} and Fernandes, {R. P.} and Teixeira, {J. A.} and Nunes, {W. D.G.} and M. Ionashiro and Caires, {F. J.}",
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pages = "67--75",
journal = "Journal of Analytical and Applied Pyrolysis",
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}

Thermal analysis in oxidative and pyrolysis conditions of alkaline earth metals picolinates using the techniques : TG-DSC, DSC, MWTA, HSM and EGA (TG-DSC-FTIR and HSM-MS). / Nascimento, A. L.C.S.; Parkes, G. M.B.; Ashton, G. P.; Fernandes, R. P.; Teixeira, J. A.; Nunes, W. D.G.; Ionashiro, M.; Caires, F. J.

In: Journal of Analytical and Applied Pyrolysis, Vol. 135, 01.10.2018, p. 67-75.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Thermal analysis in oxidative and pyrolysis conditions of alkaline earth metals picolinates using the techniques

T2 - Journal of Analytical and Applied Pyrolysis

AU - Nascimento, A. L.C.S.

AU - Parkes, G. M.B.

AU - Ashton, G. P.

AU - Fernandes, R. P.

AU - Teixeira, J. A.

AU - Nunes, W. D.G.

AU - Ionashiro, M.

AU - Caires, F. J.

PY - 2018/10/1

Y1 - 2018/10/1

N2 - Synthesis, characterization, thermal stability and pyrolysis of some alkaline earth picolinates M(C6H5NO2)2⋅nH2O (where M = Mg(II), Ca(II), Sr(II) and Ba(II) and n = di (Mg), mono (Ca), hemi three (Sr) hydrated) were investigated using a range of techniques including simultaneous thermogravimetry and differential scanning calorimetry (TG–DSC), evolved gas analysis (EGA), differential scanning calorimetry (DSC), Hot-Stage microscopy (HSM), powder X-ray diffractometry (PXRD), complexometry with EDTA and elemental analysis (EA). The TG-DSC curves show that the hydrated compounds dehydrate in a single step of mass loss and the thermal stability of the anhydrous compound is little influenced from the atmosphere used. On the other hand, the mechanisms of thermal decomposition are profoundly influenced by the atmosphere used, as can also be observed in the EGA data. In addition, a comparison between two calorimetric techniques, Microwave Thermal Analysis (MWTA) and DSC, was made which showed similar profiles. Two evolved gas analysis (EGA) techniques: TG-DSC coupled to FTIR and HSM coupled to a quadrupole mass spectrometer (MS) were also used to provide additional information about the pyrolysis mechanism.

AB - Synthesis, characterization, thermal stability and pyrolysis of some alkaline earth picolinates M(C6H5NO2)2⋅nH2O (where M = Mg(II), Ca(II), Sr(II) and Ba(II) and n = di (Mg), mono (Ca), hemi three (Sr) hydrated) were investigated using a range of techniques including simultaneous thermogravimetry and differential scanning calorimetry (TG–DSC), evolved gas analysis (EGA), differential scanning calorimetry (DSC), Hot-Stage microscopy (HSM), powder X-ray diffractometry (PXRD), complexometry with EDTA and elemental analysis (EA). The TG-DSC curves show that the hydrated compounds dehydrate in a single step of mass loss and the thermal stability of the anhydrous compound is little influenced from the atmosphere used. On the other hand, the mechanisms of thermal decomposition are profoundly influenced by the atmosphere used, as can also be observed in the EGA data. In addition, a comparison between two calorimetric techniques, Microwave Thermal Analysis (MWTA) and DSC, was made which showed similar profiles. Two evolved gas analysis (EGA) techniques: TG-DSC coupled to FTIR and HSM coupled to a quadrupole mass spectrometer (MS) were also used to provide additional information about the pyrolysis mechanism.

KW - Alkaline earth picolinates

KW - HSM-MS

KW - Microwave thermal analysis (MWTA)

KW - TG-DSC-FTIR

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JO - Journal of Analytical and Applied Pyrolysis

JF - Journal of Analytical and Applied Pyrolysis

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