CobaltMaghrebV1, Main, Exploration, bibRecord, 000948

Effect of the basicity created by La2O3 addition on the catalytic properties of Co(O)/SiO2 in CH4 + CO2 reaction

Identifieur interne : 000948 ( Main/Exploration ); précédent : 000947; suivant : 000949

Effect of the basicity created by La2O3 addition on the catalytic properties of Co(O)/SiO2 in CH4 + CO2 reaction

Auteurs : R. Bouarab [Algérie, France] ; O. Cherifi [Algérie] ; A. Auroux [France]

Source :

Thermochimica acta [ 0040-6031 ] ; 2005.

RBID : Pascal:06-0041062

Descripteurs français

Pascal (Inist)
- Basicité, Lanthane oxyde, Silice, Carbone dioxyde, Méthane, Reformage, Catalyseur, Additif, Cobalt Oxyde, Activité catalytique.

English descriptors

KwdEn :
- Additive, Alkalinity, Carbon dioxide, Catalyst, Catalyst activity, Cobalt Oxides, Lanthanum oxide, Methane, Reforming, Silica.

Abstract

A series of Co(O)/SiO₂ catalysts modified by various amounts of La₂O₃ (5, 10 or 50 wt.%) were synthesized and studied in the reaction of reforming of methane by carbon dioxide to syngas at the temperature of 873 K. The catalysts were prepared by successive incipient wetness impregnation: La₂O₃-SiO₂ supports were first prepared by impregnating silica with La(NO₃)₃ solutions. After drying and calcining under airflow, samples were then submitted to a second impregnation with Co(NO₃)₂. The purpose of this work is to study the acid-base property of these catalysts by CO₂ adsorption calorimetry at 353 K and to look at their impact on the catalytic property. The amounts of chemisorbed CO₂ and the site strength distribution of the basic sites, i.e., the basicity, were shown to be strongly dependent on La₂O₃ content. The following order of basicity was observed: Co(0)/5 wt.%La₂O₃-SiO₂ < Co(0)/10 wt.%La₂O₃-SiO₂ «Co(O)/50 wt.%La₂O₃-SiO₂. The addition of La₂O₃ to the Co(O)/SiO₂ reference sample revealed a very positive effect on the catalytic stability of catalysts. La₂O₃ prevented cobalt phase sintering by avoiding particle coalescence.

Affiliations:

Links toward previous steps (curation, corpus...)

to stream PascalFrancis, to step Corpus: 000173
to stream PascalFrancis, to step Curation: 000122
to stream PascalFrancis, to step Checkpoint: 000189
to stream Main, to step Merge: 000959
to stream Main, to step Curation: 000948

Le document en format XML

<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en" level="a">Effect of the basicity created by La<sub>2</sub>
O<sub>3</sub>
 addition on the catalytic properties of Co(O)/SiO<sub>2</sub>
 in CH<sub>4</sub>
 + CO<sub>2</sub>
 reaction</title>
<author><name sortKey="Bouarab, R" sort="Bouarab, R" uniqKey="Bouarab R" first="R." last="Bouarab">R. Bouarab</name>
<affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Département des Sciences Fondamentales, Ecole Nationale Polytechnique, 10 av. Pasteur</s1>
<s2>El Harrach</s2>
<s3>DZA</s3>
<sZ>1 aut.</sZ>
</inist:fA14>
<country>Algérie</country>
<wicri:noRegion>El Harrach</wicri:noRegion>
</affiliation>
<affiliation wicri:level="3"><inist:fA14 i1="02"><s1>Institut de Recherches sur la Catalyse, CNRS, 2 av. Einstein</s1>
<s2>69626 Villeurbanne</s2>
<s3>FRA</s3>
<sZ>1 aut.</sZ>
<sZ>3 aut.</sZ>
</inist:fA14>
<country>France</country>
<placeName><region type="region" nuts="2">Auvergne-Rhône-Alpes</region>
<region type="old region" nuts="2">Rhône-Alpes</region>
<settlement type="city">Villeurbanne</settlement>
</placeName>
</affiliation>
</author>
<author><name sortKey="Cherifi, O" sort="Cherifi, O" uniqKey="Cherifi O" first="O." last="Cherifi">O. Cherifi</name>
<affiliation wicri:level="1"><inist:fA14 i1="03"><s1>Laboratoire de Chimie de Gaz Naturel, Faculté de Chimie, U.S.T.H.B., BP 32</s1>
<s2>16111 El Alla, Bah Ezzouar</s2>
<s3>DZA</s3>
<sZ>2 aut.</sZ>
</inist:fA14>
<country>Algérie</country>
<wicri:noRegion>16111 El Alla, Bah Ezzouar</wicri:noRegion>
</affiliation>
</author>
<author><name sortKey="Auroux, A" sort="Auroux, A" uniqKey="Auroux A" first="A." last="Auroux">A. Auroux</name>
<affiliation wicri:level="3"><inist:fA14 i1="02"><s1>Institut de Recherches sur la Catalyse, CNRS, 2 av. Einstein</s1>
<s2>69626 Villeurbanne</s2>
<s3>FRA</s3>
<sZ>1 aut.</sZ>
<sZ>3 aut.</sZ>
</inist:fA14>
<country>France</country>
<placeName><region type="region" nuts="2">Auvergne-Rhône-Alpes</region>
<region type="old region" nuts="2">Rhône-Alpes</region>
<settlement type="city">Villeurbanne</settlement>
</placeName>
</affiliation>
</author>
</titleStmt>
<publicationStmt><idno type="wicri:source">INIST</idno>
<idno type="inist">06-0041062</idno>
<date when="2005">2005</date>
<idno type="stanalyst">PASCAL 06-0041062 INIST</idno>
<idno type="RBID">Pascal:06-0041062</idno>
<idno type="wicri:Area/PascalFrancis/Corpus">000173</idno>
<idno type="wicri:Area/PascalFrancis/Curation">000122</idno>
<idno type="wicri:Area/PascalFrancis/Checkpoint">000189</idno>
<idno type="wicri:explorRef" wicri:stream="PascalFrancis" wicri:step="Checkpoint">000189</idno>
<idno type="wicri:doubleKey">0040-6031:2005:Bouarab R:effect:of:the</idno>
<idno type="wicri:Area/Main/Merge">000959</idno>
<idno type="wicri:Area/Main/Curation">000948</idno>
<idno type="wicri:Area/Main/Exploration">000948</idno>
</publicationStmt>
<sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Effect of the basicity created by La<sub>2</sub>
O<sub>3</sub>
 addition on the catalytic properties of Co(O)/SiO<sub>2</sub>
 in CH<sub>4</sub>
 + CO<sub>2</sub>
 reaction</title>
<author><name sortKey="Bouarab, R" sort="Bouarab, R" uniqKey="Bouarab R" first="R." last="Bouarab">R. Bouarab</name>
<affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Département des Sciences Fondamentales, Ecole Nationale Polytechnique, 10 av. Pasteur</s1>
<s2>El Harrach</s2>
<s3>DZA</s3>
<sZ>1 aut.</sZ>
</inist:fA14>
<country>Algérie</country>
<wicri:noRegion>El Harrach</wicri:noRegion>
</affiliation>
<affiliation wicri:level="3"><inist:fA14 i1="02"><s1>Institut de Recherches sur la Catalyse, CNRS, 2 av. Einstein</s1>
<s2>69626 Villeurbanne</s2>
<s3>FRA</s3>
<sZ>1 aut.</sZ>
<sZ>3 aut.</sZ>
</inist:fA14>
<country>France</country>
<placeName><region type="region" nuts="2">Auvergne-Rhône-Alpes</region>
<region type="old region" nuts="2">Rhône-Alpes</region>
<settlement type="city">Villeurbanne</settlement>
</placeName>
</affiliation>
</author>
<author><name sortKey="Cherifi, O" sort="Cherifi, O" uniqKey="Cherifi O" first="O." last="Cherifi">O. Cherifi</name>
<affiliation wicri:level="1"><inist:fA14 i1="03"><s1>Laboratoire de Chimie de Gaz Naturel, Faculté de Chimie, U.S.T.H.B., BP 32</s1>
<s2>16111 El Alla, Bah Ezzouar</s2>
<s3>DZA</s3>
<sZ>2 aut.</sZ>
</inist:fA14>
<country>Algérie</country>
<wicri:noRegion>16111 El Alla, Bah Ezzouar</wicri:noRegion>
</affiliation>
</author>
<author><name sortKey="Auroux, A" sort="Auroux, A" uniqKey="Auroux A" first="A." last="Auroux">A. Auroux</name>
<affiliation wicri:level="3"><inist:fA14 i1="02"><s1>Institut de Recherches sur la Catalyse, CNRS, 2 av. Einstein</s1>
<s2>69626 Villeurbanne</s2>
<s3>FRA</s3>
<sZ>1 aut.</sZ>
<sZ>3 aut.</sZ>
</inist:fA14>
<country>France</country>
<placeName><region type="region" nuts="2">Auvergne-Rhône-Alpes</region>
<region type="old region" nuts="2">Rhône-Alpes</region>
<settlement type="city">Villeurbanne</settlement>
</placeName>
</affiliation>
</author>
</analytic>
<series><title level="j" type="main">Thermochimica acta</title>
<title level="j" type="abbreviated">Thermochim. acta</title>
<idno type="ISSN">0040-6031</idno>
<imprint><date when="2005">2005</date>
</imprint>
</series>
</biblStruct>
</sourceDesc>
<seriesStmt><title level="j" type="main">Thermochimica acta</title>
<title level="j" type="abbreviated">Thermochim. acta</title>
<idno type="ISSN">0040-6031</idno>
</seriesStmt>
</fileDesc>
<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Additive</term>
<term>Alkalinity</term>
<term>Carbon dioxide</term>
<term>Catalyst</term>
<term>Catalyst activity</term>
<term>Cobalt Oxides</term>
<term>Lanthanum oxide</term>
<term>Methane</term>
<term>Reforming</term>
<term>Silica</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Basicité</term>
<term>Lanthane oxyde</term>
<term>Silice</term>
<term>Carbone dioxyde</term>
<term>Méthane</term>
<term>Reformage</term>
<term>Catalyseur</term>
<term>Additif</term>
<term>Cobalt Oxyde</term>
<term>Activité catalytique</term>
</keywords>
</textClass>
</profileDesc>
</teiHeader>
<front><div type="abstract" xml:lang="en">A series of Co(O)/SiO<sub>2</sub>
 catalysts modified by various amounts of La<sub>2</sub>
O<sub>3</sub>
 (5, 10 or 50 wt.%) were synthesized and studied in the reaction of reforming of methane by carbon dioxide to syngas at the temperature of 873 K. The catalysts were prepared by successive incipient wetness impregnation: La<sub>2</sub>
O<sub>3</sub>
-SiO<sub>2</sub>
 supports were first prepared by impregnating silica with La(NO<sub>3</sub>
)<sub>3</sub>
 solutions. After drying and calcining under airflow, samples were then submitted to a second impregnation with Co(NO<sub>3</sub>
)<sub>2</sub>
. The purpose of this work is to study the acid-base property of these catalysts by CO<sub>2</sub>
 adsorption calorimetry at 353 K and to look at their impact on the catalytic property. The amounts of chemisorbed CO<sub>2</sub>
 and the site strength distribution of the basic sites, i.e., the basicity, were shown to be strongly dependent on La<sub>2</sub>
O<sub>3</sub>
 content. The following order of basicity was observed: Co(0)/5 wt.%La<sub>2</sub>
O<sub>3</sub>
-SiO<sub>2</sub>
 < Co(0)/10 wt.%La<sub>2</sub>
O<sub>3</sub>
-SiO<sub>2</sub>
 «Co(O)/50 wt.%La<sub>2</sub>
O<sub>3</sub>
-SiO<sub>2</sub>
. The addition of La<sub>2</sub>
O<sub>3</sub>
 to the Co(O)/SiO<sub>2</sub>
 reference sample revealed a very positive effect on the catalytic stability of catalysts. La<sub>2</sub>
O<sub>3</sub>
 prevented cobalt phase sintering by avoiding particle coalescence.</div>
</front>
</TEI>
<affiliations><list><country><li>Algérie</li>
<li>France</li>
</country>
<region><li>Auvergne-Rhône-Alpes</li>
<li>Rhône-Alpes</li>
</region>
<settlement><li>Villeurbanne</li>
</settlement>
</list>
<tree><country name="Algérie"><noRegion><name sortKey="Bouarab, R" sort="Bouarab, R" uniqKey="Bouarab R" first="R." last="Bouarab">R. Bouarab</name>
</noRegion>
<name sortKey="Cherifi, O" sort="Cherifi, O" uniqKey="Cherifi O" first="O." last="Cherifi">O. Cherifi</name>
</country>
<country name="France"><region name="Auvergne-Rhône-Alpes"><name sortKey="Bouarab, R" sort="Bouarab, R" uniqKey="Bouarab R" first="R." last="Bouarab">R. Bouarab</name>
</region>
<name sortKey="Auroux, A" sort="Auroux, A" uniqKey="Auroux A" first="A." last="Auroux">A. Auroux</name>
</country>
</tree>
</affiliations>
</record>

Pour manipuler ce document sous Unix (Dilib)

EXPLOR_STEP=$WICRI_ROOT/Wicri/Terre/explor/CobaltMaghrebV1/Data/Main/Exploration

HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 000948 | SxmlIndent | more

HfdSelect -h $EXPLOR_AREA/Data/Main/Exploration/biblio.hfd -nk 000948 | SxmlIndent | more

Pour mettre un lien sur cette page dans le réseau Wicri

{{Explor lien
   |wiki=    Wicri/Terre
   |area=    CobaltMaghrebV1
   |flux=    Main
   |étape=   Exploration
   |type=    RBID
   |clé=     Pascal:06-0041062
   |texte=   Effect of the basicity created by La2O3 addition on the catalytic properties of Co(O)/SiO2 in CH4 + CO2 reaction
}}

This area was generated with Dilib version V0.6.32.
Data generation: Tue Nov 14 12:56:51 2017. Site generation: Mon Feb 12 07:59:49 2024

	Serveur d'exploration sur le cobalt au Maghreb
	Attention, ce site est en cours de développement ! Attention, site généré par des moyens informatiques à partir de corpus bruts. Les informations ne sont donc pas validées.

Serveur d'exploration sur le cobalt au Maghreb

Effect of the basicity created by La2O3 addition on the catalytic properties of Co(O)/SiO2 in CH4 + CO2 reaction

Effect of the basicity created by La2O3 addition on the catalytic properties of Co(O)/SiO2 in CH4 + CO2 reaction

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri