Nickel ferrite spinel as catalyst precursor in the dry reforming of methane: Synthesis, characterization and catalytic properties
Identifieur interne : 000272 ( Main/Exploration ); précédent : 000271; suivant : 000273Nickel ferrite spinel as catalyst precursor in the dry reforming of methane: Synthesis, characterization and catalytic properties
Auteurs : Rafik Benrabaa [Algérie] ; Hamza Boukhlouf [Algérie] ; Axel Löfberg [France] ; Annick Rubbens [France] ; Rose-Nöelle Vannier [France] ; Elisabeth Bordes-Richard [France] ; Akila Barama [Algérie]Source :
- Journal of natural gas chemistry [ 1003-9953 ] ; 2012.
Descripteurs français
- Pascal (Inist)
- Préparation, Catalyseur, Ferrites, Spinelles, Analyse thermique, Diffraction RX, Précurseur, Reformage, Méthane, Spectrométrie Raman, Caractérisation, Activité catalytique, Synthèse hydrothermale, Coprécipitation, Décomposition, Analyse surface, Texture, Aire surface spécifique, Réduction chimique, Température programmée, Fer Oxyde, Composé ternaire, Nickel Oxyde, Précipitation chimique, Propriété surface, Alcool secondaire, NiFe2O4, Propan-2-ol.
English descriptors
- KwdEn :
- Catalyst, Catalyst activity, Characterization, Chemical precipitation, Chemical reduction, Coprecipitation, Decomposition, Ferrites, Hydrothermal synthesis, Iron Oxides, Methane, Nickel Oxides, Precursor, Preparation, Programmed temperature, Raman spectrometry, Reforming, Secondary alcohol, Specific surface area, Spinels, Surface analysis, Surface properties, Ternary compound, Texture, Thermal analysis, X ray diffraction.
Abstract
Dry reforming of methane by CO2 using nickel ferrite as precursor of catalysts was investigated. Nickel ferrite crystalline particles were prepared by coprecipitation of nitrates with NaOH or ammonia followed by calcination, or by hydrothermal synthesis without calcination step. The textural and structural properties were determined by a number of analysis methods, including X-ray diffraction (XRD), Raman spectroscopy and X-ray photoelectron spectroscopy (XPS), among which X-ray diffraction (XRD) was at room and variable temperatures. All synthesized oxides showed the presence of micro or nanoparticles of NiFe2O4 inverse spinel, but Fe2O3 (hematite) was also present when ammonia was used for coprecipitation. The reducibility by hydrogen was studied by temperature-programmed reduction (TPR) and in situ XRD, which showed the influence of the preparation method. The surface area (BET), particle size (Rietveld refinement), as well as surface Ni/Fe atomic ratio (XPS) and the behavior upon reduction varied according to the synthesis method. The catalytic reactivity was investigated using isopropanol decomposition to determine the acid/base properties. The catalytic performance of methane reforming with CO2 was measured with and without the pre-treatment of catalysts under H2 in 650-800 °C range. The catalytic conversions of methane and CO2 were quite low but they increased when the catalysts were pre-reduced. A significant contribution of reverse water gas shift reaction accounted for the low values of H2/CO ratio. No coking was observed as shown by the reoxidation step performed after the catalytic reactions. The possible formation of nickel-iron alloy observed during the study of reducibility by hydrogen was invoked to account for the catalytic behavior.
Affiliations:
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Université des Sciences et Technologies de Lille, Cité Scientifique</s1><s2>59655 Villeneuve d'Ascq</s2><s3>FRA</s3><sZ>3 aut.</sZ><sZ>4 aut.</sZ><sZ>5 aut.</sZ><sZ>6 aut.</sZ></inist:fA14><country>France</country><placeName><region type="region" nuts="2">Hauts-de-France</region><region type="old region" nuts="2">Nord-Pas-de-Calais</region><settlement type="city">Villeneuve d'Ascq</settlement></placeName></affiliation></author><author><name sortKey="Vannier, Rose Noelle" sort="Vannier, Rose Noelle" uniqKey="Vannier R" first="Rose-Nöelle" last="Vannier">Rose-Nöelle Vannier</name><affiliation wicri:level="3"><inist:fA14 i1="02"><s1>Unité de Catalyse et de Chimie du Solide, UMR CNRS 8181, Ecole Nationale Supérieure de Chimie de Lille, Université des Sciences et Technologies de Lille, Cité Scientifique</s1><s2>59655 Villeneuve d'Ascq</s2><s3>FRA</s3><sZ>3 aut.</sZ><sZ>4 aut.</sZ><sZ>5 aut.</sZ><sZ>6 aut.</sZ></inist:fA14><country>France</country><placeName><region type="region" 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sort="Barama, Akila" uniqKey="Barama A" first="Akila" last="Barama">Akila Barama</name><affiliation wicri:level="3"><inist:fA14 i1="01"><s1>Laboratoire de Matériaux Catalytiques & Catalyse en Chimie Organique, Faculté de Chimie, USTHB, BP32 El Alia</s1><s2>16111 Bab Ezzouar, Alger</s2><s3>DZA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>7 aut.</sZ></inist:fA14><country>Algérie</country><placeName><settlement type="city">Alger</settlement><region nuts="2">Wilaya d'Alger</region></placeName></affiliation></author></analytic><series><title level="j" type="main">Journal of natural gas chemistry</title><title level="j" type="abbreviated">J. nat. gas chem.</title><idno type="ISSN">1003-9953</idno><imprint><date when="2012">2012</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Journal of natural gas chemistry</title><title level="j" type="abbreviated">J. nat. gas chem.</title><idno type="ISSN">1003-9953</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Catalyst</term><term>Catalyst activity</term><term>Characterization</term><term>Chemical precipitation</term><term>Chemical reduction</term><term>Coprecipitation</term><term>Decomposition</term><term>Ferrites</term><term>Hydrothermal synthesis</term><term>Iron Oxides</term><term>Methane</term><term>Nickel Oxides</term><term>Precursor</term><term>Preparation</term><term>Programmed temperature</term><term>Raman spectrometry</term><term>Reforming</term><term>Secondary alcohol</term><term>Specific surface area</term><term>Spinels</term><term>Surface analysis</term><term>Surface properties</term><term>Ternary compound</term><term>Texture</term><term>Thermal analysis</term><term>X ray diffraction</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Préparation</term><term>Catalyseur</term><term>Ferrites</term><term>Spinelles</term><term>Analyse thermique</term><term>Diffraction RX</term><term>Précurseur</term><term>Reformage</term><term>Méthane</term><term>Spectrométrie Raman</term><term>Caractérisation</term><term>Activité catalytique</term><term>Synthèse hydrothermale</term><term>Coprécipitation</term><term>Décomposition</term><term>Analyse surface</term><term>Texture</term><term>Aire surface spécifique</term><term>Réduction chimique</term><term>Température programmée</term><term>Fer Oxyde</term><term>Composé ternaire</term><term>Nickel Oxyde</term><term>Précipitation chimique</term><term>Propriété surface</term><term>Alcool secondaire</term><term>NiFe2O4</term><term>Propan-2-ol</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Dry reforming of methane by CO<sub>2</sub> using nickel ferrite as precursor of catalysts was investigated. Nickel ferrite crystalline particles were prepared by coprecipitation of nitrates with NaOH or ammonia followed by calcination, or by hydrothermal synthesis without calcination step. The textural and structural properties were determined by a number of analysis methods, including X-ray diffraction (XRD), Raman spectroscopy and X-ray photoelectron spectroscopy (XPS), among which X-ray diffraction (XRD) was at room and variable temperatures. All synthesized oxides showed the presence of micro or nanoparticles of NiFe<sub>2</sub>O<sub>4</sub> inverse spinel, but Fe<sub>2</sub>O<sub>3</sub> (hematite) was also present when ammonia was used for coprecipitation. The reducibility by hydrogen was studied by temperature-programmed reduction (TPR) and in situ XRD, which showed the influence of the preparation method. The surface area (BET), particle size (Rietveld refinement), as well as surface Ni/Fe atomic ratio (XPS) and the behavior upon reduction varied according to the synthesis method. The catalytic reactivity was investigated using isopropanol decomposition to determine the acid/base properties. The catalytic performance of methane reforming with CO<sub>2</sub> was measured with and without the pre-treatment of catalysts under H<sub>2</sub> in 650-800 °C range. The catalytic conversions of methane and CO<sub>2</sub> were quite low but they increased when the catalysts were pre-reduced. A significant contribution of reverse water gas shift reaction accounted for the low values of H<sub>2</sub>/CO ratio. No coking was observed as shown by the reoxidation step performed after the catalytic reactions. The possible formation of nickel-iron alloy observed during the study of reducibility by hydrogen was invoked to account for the catalytic behavior.</div></front></TEI><affiliations><list><country><li>Algérie</li><li>France</li></country><region><li>Hauts-de-France</li><li>Nord-Pas-de-Calais</li><li>Wilaya d'Alger</li></region><settlement><li>Alger</li><li>Villeneuve d'Ascq</li></settlement></list><tree><country name="Algérie"><region name="Wilaya d'Alger"><name sortKey="Benrabaa, Rafik" sort="Benrabaa, Rafik" uniqKey="Benrabaa R" first="Rafik" last="Benrabaa">Rafik Benrabaa</name></region><name sortKey="Barama, Akila" sort="Barama, Akila" uniqKey="Barama A" first="Akila" last="Barama">Akila Barama</name><name sortKey="Boukhlouf, Hamza" sort="Boukhlouf, Hamza" uniqKey="Boukhlouf H" first="Hamza" last="Boukhlouf">Hamza Boukhlouf</name></country><country name="France"><region name="Hauts-de-France"><name sortKey="Lofberg, Axel" sort="Lofberg, Axel" uniqKey="Lofberg A" first="Axel" last="Löfberg">Axel Löfberg</name></region><name sortKey="Bordes Richard, Elisabeth" sort="Bordes Richard, Elisabeth" uniqKey="Bordes Richard E" first="Elisabeth" last="Bordes-Richard">Elisabeth Bordes-Richard</name><name sortKey="Rubbens, Annick" sort="Rubbens, Annick" uniqKey="Rubbens A" first="Annick" last="Rubbens">Annick Rubbens</name><name sortKey="Vannier, Rose Noelle" sort="Vannier, Rose Noelle" uniqKey="Vannier R" first="Rose-Nöelle" last="Vannier">Rose-Nöelle Vannier</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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