CobaltMaghrebV1, Main, Exploration, bibRecord, 000642

Dissolution of Cobalt from CoO/Al2O3 Catalyst with Mineral Acids

Identifieur interne : 000642 ( Main/Exploration ); précédent : 000641; suivant : 000643

Dissolution of Cobalt from CoO/Al2O3 Catalyst with Mineral Acids

Auteurs : Ikram Boukerche [Algérie] ; Naima Habbache [Algérie] ; Nadia Alane [Algérie] ; Souad Djerad [Algérie] ; Lakhdar Tifouti [Algérie]

Source :

Industrial & engineering chemistry research [ 0888-5885 ] ; 2010.

RBID : Pascal:10-0363976

Descripteurs français

Pascal (Inist)
- Dissolution, Catalyseur.

English descriptors

KwdEn :
- Catalyst, Dissolution.

Abstract

In this study, the dissolution of CoO from CoO/Al₂O₃ catalyst with HCl, H₂SO₄, and HNO₃ solutions was investigated in a batch reactor employing parameters that were expected to affect the dissolution rate of cobalt, such as stirring speed, temperature, and acid concentration. It was found that 99.82% of cobalt was dissolved after 4 h with HCl at 2 M, 75 °C, and a liquid-to-solid ratio (l/s) of 100 mL/g, while only 31.96% and 13.57% cobalt dissolutions were reached with H₂SO₄ and HNO₃, respectively, under the same operation conditions. The difference in dissolution rates was due to the presence of different anions (Cl^-, NO₃^-, and HSO₄^-) involved in the surface reactions. Dissolution kinetic of cobalt was examined according to a heterogeneous model. It was found that the dissolution rate was controlled by surface chemical processes in all cases.

Affiliations:

Algérie

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

to stream PascalFrancis, to step Corpus: 000087
to stream PascalFrancis, to step Curation: 000208
to stream PascalFrancis, to step Checkpoint: 000096
to stream Main, to step Merge: 000647
to stream Main, to step Curation: 000642

Le document en format XML

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 Catalyst with Mineral Acids</title>
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 Catalyst with Mineral Acids</title>
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<series><title level="j" type="main">Industrial & engineering chemistry research</title>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Catalyst</term>
<term>Dissolution</term>
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<front><div type="abstract" xml:lang="en">In this study, the dissolution of CoO from CoO/Al<sub>2</sub>
O<sub>3</sub>
 catalyst with HCl, H<sub>2</sub>
SO<sub>4</sub>
, and HNO<sub>3</sub>
 solutions was investigated in a batch reactor employing parameters that were expected to affect the dissolution rate of cobalt, such as stirring speed, temperature, and acid concentration. It was found that 99.82% of cobalt was dissolved after 4 h with HCl at 2 M, 75 °C, and a liquid-to-solid ratio (l/s) of 100 mL/g, while only 31.96% and 13.57% cobalt dissolutions were reached with H<sub>2</sub>
SO<sub>4</sub>
 and HNO<sub>3</sub>
, respectively, under the same operation conditions. The difference in dissolution rates was due to the presence of different anions (Cl<sup>-</sup>
, NO<sub>3</sub>
<sup>-</sup>
, and HSO<sub>4</sub>
<sup>-</sup>
) involved in the surface reactions. Dissolution kinetic of cobalt was examined according to a heterogeneous model. It was found that the dissolution rate was controlled by surface chemical processes in all cases.</div>
</front>
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<tree><country name="Algérie"><noRegion><name sortKey="Boukerche, Ikram" sort="Boukerche, Ikram" uniqKey="Boukerche I" first="Ikram" last="Boukerche">Ikram Boukerche</name>
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<name sortKey="Tifouti, Lakhdar" sort="Tifouti, Lakhdar" uniqKey="Tifouti L" first="Lakhdar" last="Tifouti">Lakhdar Tifouti</name>
</country>
</tree>
</affiliations>
</record>

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Dissolution of Cobalt from CoO/Al2O3 Catalyst with Mineral Acids

Dissolution of Cobalt from CoO/Al2O3 Catalyst with Mineral Acids

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