INFLUENCE OF SOME MINERALS ON THE CELLULOSE THERMAL DEGRADATION MECHANISMS : Thermogravimetic and pyrolysis-mass spectrometry studies
Identifieur interne : 001111 ( Main/Exploration ); précédent : 001110; suivant : 001112INFLUENCE OF SOME MINERALS ON THE CELLULOSE THERMAL DEGRADATION MECHANISMS : Thermogravimetic and pyrolysis-mass spectrometry studies
Auteurs : Anissa Khelfa [France] ; Gisèle Finqueneisel [France] ; M. Auber [France] ; J. V. Weber [France]Source :
- Journal of thermal analysis and calorimetry [ 1388-6150 ] ; 2008.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Cellulose.
English descriptors
- KwdEn :
Abstract
The influence of different inorganic salts (MgCl2, ZnCl2, NiCl2 and H2PtCl6) on the primary mechanisms of cellulose thermal degradation has been conducted by using thermogravimetric (TG-DTG) and pyrolysis-mass spectrometry (Py-MS) analysis at low heating rate (10°C min-1) from ambient temperature to 500°C. The results clearly demonstrate that the used salts influence the primary degradation mechanisms. Furthermore, we can assume that some inorganic salts could be considered as specific catalysts and some others as inhibitors. MgCl2 promotes selectively initial low temperature dehydration as observed both by TG and Py-MS. ZnCl2 strongly changes the thermal behaviour of impregnated sample. The maximum mass loss rate temperature is shifted to lower temperature and on the basis of our results we can conclude that ZnCl2 acts as catalyst in all primary degradation mechanisms. NiCl2 and H2PtCl6 do not modify significantly the cellulose thermal behaviour but change the composition of both produced gases and liquids suggesting that these minerals catalyse some secondary reactions.
Affiliations:
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Auber</name><affiliation wicri:level="3"><inist:fA14 i1="02"><s1>Laboratoire des Matériaux Surfaces et Procédés pour la Catalyse, CNRS-ECPM -25, rue Becquerel</s1><s2>67087 Strasbourg</s2><s3>FRA</s3><sZ>3 aut.</sZ></inist:fA14><country>France</country><placeName><region type="region" nuts="2">Grand Est</region><region type="old region" nuts="2">Alsace (région administrative)</region><settlement type="city">Strasbourg</settlement></placeName></affiliation><affiliation wicri:level="3"><inist:fA14 i1="03"><s1>Laboratoire des Sciences du Génie Chimique, CNRS-Nancy Université-ENSIC-1, rue Grandville -BP 20451</s1><s2>54001 Nancy</s2><s3>FRA</s3><sZ>3 aut.</sZ></inist:fA14><country>France</country><placeName><region type="region" nuts="2">Grand Est</region><region type="old region" nuts="2">Lorraine (région)</region><settlement type="city">Nancy</settlement></placeName></affiliation></author><author><name sortKey="Weber, J V" sort="Weber, J V" uniqKey="Weber J" first="J. V." last="Weber">J. V. Weber</name><affiliation wicri:level="3"><inist:fA14 i1="01"><s1>Laboratoire de Chimie et de Méthodologies pour l'Environnement, Université Paul Verlaine Metz,IUT Moselle-Est rue Victor Demange -BP 80105</s1><s2>57500 Saint-Avold</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>France</country><placeName><region type="region" nuts="2">Grand Est</region><region type="old region" nuts="2">Lorraine (région)</region><settlement type="city">Saint-Avold</settlement></placeName></affiliation></author></analytic><series><title level="j" type="main">Journal of thermal analysis and calorimetry</title><title level="j" type="abbreviated">J. therm. anal. calorim.</title><idno type="ISSN">1388-6150</idno><imprint><date when="2008">2008</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Journal of thermal analysis and calorimetry</title><title level="j" type="abbreviated">J. therm. anal. calorim.</title><idno type="ISSN">1388-6150</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Catalysis</term><term>Cellulose</term><term>Heating rate</term><term>Hexachloroplatinic acid</term><term>Magnesium Chlorides</term><term>Mass spectrometry</term><term>Medium effect</term><term>Nickel II Chlorides</term><term>Pyrolysis</term><term>Reaction mechanism</term><term>Thermal analysis</term><term>Thermogravimetry</term><term>Zinc II Chlorides</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Cellulose</term><term>Pyrolyse</term><term>Mécanisme réaction</term><term>Spectrométrie masse</term><term>Catalyse</term><term>Vitesse chauffage</term><term>Thermogravimétrie</term><term>Effet milieu</term><term>Magnésium Chlorure</term><term>Zinc II Chlorure</term><term>Nickel II Chlorure</term><term>Acide hexachloroplatinique</term><term>Analyse thermique</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Cellulose</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The influence of different inorganic salts (MgCl<sub>2</sub>, ZnCl<sub>2</sub>, NiCl<sub>2</sub> and H<sub>2</sub>PtCl<sub>6</sub>) on the primary mechanisms of cellulose thermal degradation has been conducted by using thermogravimetric (TG-DTG) and pyrolysis-mass spectrometry (Py-MS) analysis at low heating rate (10°C min<sup>-1</sup>) from ambient temperature to 500°C. The results clearly demonstrate that the used salts influence the primary degradation mechanisms. Furthermore, we can assume that some inorganic salts could be considered as specific catalysts and some others as inhibitors. MgCl<sub>2</sub> promotes selectively initial low temperature dehydration as observed both by TG and Py-MS. ZnCl<sub>2</sub> strongly changes the thermal behaviour of impregnated sample. The maximum mass loss rate temperature is shifted to lower temperature and on the basis of our results we can conclude that ZnCl<sub>2</sub> acts as catalyst in all primary degradation mechanisms. NiCl<sub>2</sub> and H<sub>2</sub>PtCl<sub>6</sub> do not modify significantly the cellulose thermal behaviour but change the composition of both produced gases and liquids suggesting that these minerals catalyse some secondary reactions.</div></front></TEI><affiliations><list><country><li>France</li></country><region><li>Alsace (région administrative)</li><li>Grand Est</li><li>Lorraine (région)</li></region><settlement><li>Nancy</li><li>Saint-Avold</li><li>Strasbourg</li></settlement></list><tree><country name="France"><region name="Grand Est"><name sortKey="Khelfa, Anissa" sort="Khelfa, Anissa" uniqKey="Khelfa A" first="Anissa" last="Khelfa">Anissa Khelfa</name></region><name sortKey="Auber, M" sort="Auber, M" uniqKey="Auber M" first="M." last="Auber">M. Auber</name><name sortKey="Auber, M" sort="Auber, M" uniqKey="Auber M" first="M." last="Auber">M. Auber</name><name sortKey="Finqueneisel, Gisele" sort="Finqueneisel, Gisele" uniqKey="Finqueneisel G" first="Gisèle" last="Finqueneisel">Gisèle Finqueneisel</name><name sortKey="Weber, J V" sort="Weber, J V" uniqKey="Weber J" first="J. V." last="Weber">J. V. Weber</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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