Measurement and modelling of kinetics of hydrogen sorption by LaNi5 and two related pseudobinary compounds
Identifieur interne : 000650 ( Main/Exploration ); précédent : 000649; suivant : 000651Measurement and modelling of kinetics of hydrogen sorption by LaNi5 and two related pseudobinary compounds
Auteurs : H. Dhaou [Tunisie] ; F. Askri [Tunisie] ; M. Ben Salah [Tunisie] ; A. Jemni [Tunisie] ; S. Ben Nasrallah [Tunisie] ; Jilani Lamloumi [Tunisie]Source :
- International journal of hydrogen energy [ 0360-3199 ] ; 2007.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Hydrogène.
English descriptors
- KwdEn :
Abstract
The hydriding/dehydriding rates and the pressure-composition isotherms were measured for LaNi5, LaNi4.85Al0.15 and LaN14.75Fe0.25 under quasi-isothermal and variable pressure conditions. Isothermal conditions were obtained by reducing the thermal time constant of the experimental device. Empirical rate equations to describe the sorption reaction kinetics were derived. These rates are expressed as a function of temporal composition, saturated composition, temperature, applied pressure and essentially the initial operating conditions which were not considered in most of all the previous studies related to the reaction kinetics of metal hydrides. Besides, the rate equations presented in this work can be integrated easily in the numerical models that predict dynamic flow and heat and mass transfer within realistic metal-hydrogen devices. This paper also discusses the effects of Fe and Al as substituents for Ni on P-C isotherms and reaction rates of LaNi5 alloy.
Affiliations:
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Dhaou</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Laboratoire des Etudes des systèmes Thermiques et Energétiques. EN/M, Route de Kairouan</s1><s2>5019 Monastir</s2><s3>TUN</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ><sZ>5 aut.</sZ></inist:fA14><country>Tunisie</country><wicri:noRegion>5019 Monastir</wicri:noRegion></affiliation></author><author><name sortKey="Askri, F" sort="Askri, F" uniqKey="Askri F" first="F." last="Askri">F. Askri</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Laboratoire des Etudes des systèmes Thermiques et Energétiques. EN/M, Route de Kairouan</s1><s2>5019 Monastir</s2><s3>TUN</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ><sZ>5 aut.</sZ></inist:fA14><country>Tunisie</country><wicri:noRegion>5019 Monastir</wicri:noRegion></affiliation></author><author><name sortKey="Ben Salah, M" sort="Ben Salah, M" uniqKey="Ben Salah M" first="M." last="Ben Salah">M. Ben Salah</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Laboratoire des Etudes des systèmes Thermiques et Energétiques. EN/M, Route de Kairouan</s1><s2>5019 Monastir</s2><s3>TUN</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ><sZ>5 aut.</sZ></inist:fA14><country>Tunisie</country><wicri:noRegion>5019 Monastir</wicri:noRegion></affiliation></author><author><name sortKey="Jemni, A" sort="Jemni, A" uniqKey="Jemni A" first="A." last="Jemni">A. Jemni</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Laboratoire des Etudes des systèmes Thermiques et Energétiques. EN/M, Route de Kairouan</s1><s2>5019 Monastir</s2><s3>TUN</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ><sZ>5 aut.</sZ></inist:fA14><country>Tunisie</country><wicri:noRegion>5019 Monastir</wicri:noRegion></affiliation></author><author><name sortKey="Ben Nasrallah, S" sort="Ben Nasrallah, S" uniqKey="Ben Nasrallah S" first="S." last="Ben Nasrallah">S. Ben Nasrallah</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Laboratoire des Etudes des systèmes Thermiques et Energétiques. EN/M, Route de Kairouan</s1><s2>5019 Monastir</s2><s3>TUN</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ><sZ>5 aut.</sZ></inist:fA14><country>Tunisie</country><wicri:noRegion>5019 Monastir</wicri:noRegion></affiliation></author><author><name sortKey="Lamloumi, J" sort="Lamloumi, J" uniqKey="Lamloumi J" first="J." last="Lamloumi">Jilani Lamloumi</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Laboratoire de Mécanique, Matériaux et procédés, ESSTT, 5 Avenue Taha Hussein</s1><s2>1008 Tunis</s2><s3>TUN</s3><sZ>6 aut.</sZ></inist:fA14><country>Tunisie</country><placeName><settlement type="city">Tunis</settlement><region nuts="2">Gouvernorat de Tunis</region></placeName><placeName><settlement type="city">Tunis</settlement><region type="region" nuts="2">Gouvernorat de Tunis</region></placeName><orgName type="university" n="3">Université de Tunis</orgName></affiliation></author></analytic><series><title level="j" type="main">International journal of hydrogen energy</title><title level="j" type="abbreviated">Int. j. hydrogen energy</title><idno type="ISSN">0360-3199</idno><imprint><date when="2007">2007</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">International journal of hydrogen energy</title><title level="j" type="abbreviated">Int. j. hydrogen energy</title><idno type="ISSN">0360-3199</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Dehydridation</term><term>Dynamic model</term><term>Heat mass transfer</term><term>Hydridation</term><term>Hydrogen</term><term>Kinetics</term><term>Lanthanum Nickel Alloys</term><term>Lanthanum Nickel Aluminium Alloys</term><term>Lanthanum Nickel Iron Alloys</term><term>Measurement</term><term>Modeling</term><term>Sorption</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Mesure</term><term>Modélisation</term><term>Cinétique</term><term>Hydrogène</term><term>Sorption</term><term>Lanthane Nickel Alliage</term><term>Lanthane Nickel Aluminium Alliage</term><term>Lanthane Nickel Fer Alliage</term><term>Hydruration</term><term>Deshydruration</term><term>Modèle dynamique</term><term>Transfert chaleur masse</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Hydrogène</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The hydriding/dehydriding rates and the pressure-composition isotherms were measured for LaNi5, LaNi<sub>4.85</sub>Al<sub>0.15</sub> and LaN1<sub>4.75</sub>Fe<sub>0.25</sub> under quasi-isothermal and variable pressure conditions. Isothermal conditions were obtained by reducing the thermal time constant of the experimental device. Empirical rate equations to describe the sorption reaction kinetics were derived. These rates are expressed as a function of temporal composition, saturated composition, temperature, applied pressure and essentially the initial operating conditions which were not considered in most of all the previous studies related to the reaction kinetics of metal hydrides. Besides, the rate equations presented in this work can be integrated easily in the numerical models that predict dynamic flow and heat and mass transfer within realistic metal-hydrogen devices. This paper also discusses the effects of Fe and Al as substituents for Ni on P-C isotherms and reaction rates of LaNi<sub>5</sub> alloy.</div></front></TEI><affiliations><list><country><li>Tunisie</li></country><region><li>Gouvernorat de Tunis</li></region><settlement><li>Tunis</li></settlement><orgName><li>Université de Tunis</li></orgName></list><tree><country name="Tunisie"><noRegion><name sortKey="Dhaou, H" sort="Dhaou, H" uniqKey="Dhaou H" first="H." last="Dhaou">H. Dhaou</name></noRegion><name sortKey="Askri, F" sort="Askri, F" uniqKey="Askri F" first="F." last="Askri">F. Askri</name><name sortKey="Ben Nasrallah, S" sort="Ben Nasrallah, S" uniqKey="Ben Nasrallah S" first="S." last="Ben Nasrallah">S. Ben Nasrallah</name><name sortKey="Ben Salah, M" sort="Ben Salah, M" uniqKey="Ben Salah M" first="M." last="Ben Salah">M. Ben Salah</name><name sortKey="Jemni, A" sort="Jemni, A" uniqKey="Jemni A" first="A." last="Jemni">A. Jemni</name><name sortKey="Lamloumi, J" sort="Lamloumi, J" uniqKey="Lamloumi J" first="J." last="Lamloumi">Jilani Lamloumi</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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