Mass transfer correlation of simultaneous removal by cementation of nickel and cobalt from sulphate industrial solution containing copper. Part II: Onto zinc powder
Identifieur interne : 000873 ( Main/Exploration ); précédent : 000872; suivant : 000874Mass transfer correlation of simultaneous removal by cementation of nickel and cobalt from sulphate industrial solution containing copper. Part II: Onto zinc powder
Auteurs : A. Dib [Algérie] ; L. Makhloufi [Algérie]Source :
- Chemical engineering journal : (1996) [ 1385-8947 ] ; 2006.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Poussière.
English descriptors
- KwdEn :
Abstract
This work is devoted to a kinetic and mass transfer study of simultaneous cementation of nickel and cobalt on zinc powder through stirred tank reactor. The influence of different parameters (stirring rate, temperature, zinc dust quantity, concentration of zinc and copper) on the process of cementation of cobalt and nickel in similar conditions to those of industrial zinc sulphate solution was experimentally determined. These parameters were studied for their effect on the rate of simultaneous cementation represented by the product kae, of the overall mass transfer coefficient k and the effective surface area ae. Some of the significant results are the following: (1) The cementation reaction of nickel was found to proceed with two different rates: an initial fast rate followed by a final slower one. The product kae was calculated and the values increased with stirring rate and less affected by temperature. Mechanistic study of the reaction through activation energy determination (13 kJ mol-1) showed that the cementation of nickel on zinc is a diffusion controlled reaction. (2) The temporal evolution of the cobalt concentration has revealed that the re-dissolution of cobalt occurred after about 50min. The reaction of cobalt was found under chemical control.
Affiliations:
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Le document en format XML
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Makhloufi</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Laboratoire de Technologie des Matériaux et de Génie des Procédés (L.T.M.G.P), Département de Génie des Procédés, Université de Bejaïa</s1><s2>06000 Bejaïa</s2><s3>DZA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>Algérie</country><wicri:noRegion>06000 Bejaïa</wicri:noRegion></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">06-0434263</idno><date when="2006">2006</date><idno type="stanalyst">PASCAL 06-0434263 INIST</idno><idno type="RBID">Pascal:06-0434263</idno><idno type="wicri:Area/PascalFrancis/Corpus">000159</idno><idno type="wicri:Area/PascalFrancis/Curation">000136</idno><idno type="wicri:Area/PascalFrancis/Checkpoint">000162</idno><idno type="wicri:explorRef" wicri:stream="PascalFrancis" wicri:step="Checkpoint">000162</idno><idno type="wicri:doubleKey">1385-8947:2006:Dib A:mass:transfer:correlation</idno><idno type="wicri:Area/Main/Merge">000882</idno><idno type="wicri:Area/Main/Curation">000873</idno><idno type="wicri:Area/Main/Exploration">000873</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Mass transfer correlation of simultaneous removal by cementation of nickel and cobalt from sulphate industrial solution containing copper. Part II: Onto zinc powder</title><author><name sortKey="Dib, A" sort="Dib, A" uniqKey="Dib A" first="A." last="Dib">A. Dib</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Laboratoire de Technologie des Matériaux et de Génie des Procédés (L.T.M.G.P), Département de Génie des Procédés, Université de Bejaïa</s1><s2>06000 Bejaïa</s2><s3>DZA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>Algérie</country><wicri:noRegion>06000 Bejaïa</wicri:noRegion></affiliation></author><author><name sortKey="Makhloufi, L" sort="Makhloufi, L" uniqKey="Makhloufi L" first="L." last="Makhloufi">L. Makhloufi</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Laboratoire de Technologie des Matériaux et de Génie des Procédés (L.T.M.G.P), Département de Génie des Procédés, Université de Bejaïa</s1><s2>06000 Bejaïa</s2><s3>DZA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>Algérie</country><wicri:noRegion>06000 Bejaïa</wicri:noRegion></affiliation></author></analytic><series><title level="j" type="main">Chemical engineering journal : (1996)</title><title level="j" type="abbreviated">Chem. eng. j. : (1996)</title><idno type="ISSN">1385-8947</idno><imprint><date when="2006">2006</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Chemical engineering journal : (1996)</title><title level="j" type="abbreviated">Chem. eng. j. : (1996)</title><idno type="ISSN">1385-8947</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Activation energy</term><term>Correlation</term><term>Correlation analysis</term><term>Diffusion</term><term>Dissolution</term><term>Dust</term><term>Kinetics</term><term>Mass transfer</term><term>Mass transfer coefficient</term><term>Powder</term><term>Stirred tank reactor</term><term>Stirring</term><term>Surface area</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Transfert masse</term><term>Corrélation</term><term>Analyse corrélation</term><term>Poudre</term><term>Cinétique</term><term>Réacteur agité</term><term>Agitation mécanique</term><term>Poussière</term><term>Coefficient transfert masse</term><term>Aire superficielle</term><term>Energie activation</term><term>Diffusion</term><term>Dissolution</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Poussière</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">This work is devoted to a kinetic and mass transfer study of simultaneous cementation of nickel and cobalt on zinc powder through stirred tank reactor. The influence of different parameters (stirring rate, temperature, zinc dust quantity, concentration of zinc and copper) on the process of cementation of cobalt and nickel in similar conditions to those of industrial zinc sulphate solution was experimentally determined. These parameters were studied for their effect on the rate of simultaneous cementation represented by the product ka<sub>e</sub>, of the overall mass transfer coefficient k and the effective surface area a<sub>e</sub>. Some of the significant results are the following: (1) The cementation reaction of nickel was found to proceed with two different rates: an initial fast rate followed by a final slower one. The product ka<sub>e</sub> was calculated and the values increased with stirring rate and less affected by temperature. Mechanistic study of the reaction through activation energy determination (13 kJ mol<sup>-1</sup>) showed that the cementation of nickel on zinc is a diffusion controlled reaction. (2) The temporal evolution of the cobalt concentration has revealed that the re-dissolution of cobalt occurred after about 50min. The reaction of cobalt was found under chemical control.</div></front></TEI><affiliations><list><country><li>Algérie</li></country></list><tree><country name="Algérie"><noRegion><name sortKey="Dib, A" sort="Dib, A" uniqKey="Dib A" first="A." last="Dib">A. Dib</name></noRegion><name sortKey="Makhloufi, L" sort="Makhloufi, L" uniqKey="Makhloufi L" first="L." last="Makhloufi">L. Makhloufi</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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