The Experts below are selected from a list of 3033 Experts worldwide ranked by ideXlab platform
Giovanni Vitulli - One of the best experts on this subject based on the ideXlab platform.
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the catalytic hydrogenation of adiponitrile to Hexamethylenediamine over a rhodium alumina catalyst in a three phase slurry reactor
Journal of Molecular Catalysis A-chemical, 2003Co-Authors: S Alini, A Bottino, G Capannelli, R Carbone, A Comite, Giovanni VitulliAbstract:Abstract Adiponitrile was hydrogenated to Hexamethylenediamine in a three phase stirred slurry reactor at 353 K and 3 MPa using rhodium on γ-alumina powder as a catalyst. Rhodium, with a very high metal dispersion, was deposited on the alumina support using the metal vapour synthesis technique. The performances of this supported catalyst were compared to those of one currently used in industrial processes (Raney Ni). The Rh/Al 2 O 3 catalyst showed interesting Hexamethylenediamine selectivity and adiponitrile conversion. Both the temperature and pressure positively influenced conversion and selectivity, and under a certain pressure threshold the formation of Hexamethylenediamine was negligible.
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The catalytic hydrogenation of adiponitrile to Hexamethylenediamine over a rhodium/alumina catalyst in a three phase slurry reactor
Journal of Molecular Catalysis A-chemical, 2003Co-Authors: S Alini, A Bottino, G Capannelli, R Carbone, A Comite, Giovanni VitulliAbstract:Abstract Adiponitrile was hydrogenated to Hexamethylenediamine in a three phase stirred slurry reactor at 353 K and 3 MPa using rhodium on γ-alumina powder as a catalyst. Rhodium, with a very high metal dispersion, was deposited on the alumina support using the metal vapour synthesis technique. The performances of this supported catalyst were compared to those of one currently used in industrial processes (Raney Ni). The Rh/Al 2 O 3 catalyst showed interesting Hexamethylenediamine selectivity and adiponitrile conversion. Both the temperature and pressure positively influenced conversion and selectivity, and under a certain pressure threshold the formation of Hexamethylenediamine was negligible.
A. Azzouz - One of the best experts on this subject based on the ideXlab platform.
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Synthesis and properties of ZnO-HMD@ZnO-Fe/Cu core-shell as advanced material for hydrogen storage
Journal of Colloid and Interface Science, 2017Co-Authors: Nabil Bouazizi, T. Boudharaa, Radhouane Bargougui, Julien Vieillard, S. Ammar, Franck Le Derf, A. AzzouzAbstract:In this paper, a new synthetic strategy towards functionalized ZnO-HMD@ZnO-Fe/Cu core-shell using sol-gel process modified by chemical grafting of Hexamethylenediamine (HMD) on the core and in-situ dispersion of Cu0/Fe0 as metallic nanoparticles (M-NPs) on the shell. The as-prepared core-shell materials were fully characterized by transmission electron microscopy, X-ray powder diffractometry, diffuse reflectance and FT-IR spectrophotometery, photoluminescence, and complexes impedance spectroscopy measurements. The XRD patterns agreed with that of the ZnO typical wurtzite structure, indicating good crystallinity of ZnO-HMD@ZnO-Fe/Cu, with the presence of Fe0 and Cu0 phases. Hexamethylenediamine grafting and M-NPs insertion were highly activated and enhanced the core and shell interface by the physiochemical interaction. After functionalization, luminescence intensities and electrical properties of both core and core-shell nanoparticles are improved, indicating the effects of the surface groups on the charge transfer of ZnO-HMD@ZnO-Fe/Cu. The hydrogen capacity retention was depended strongly on the composition and structure of the obtained core-shell. Iron/Copper-loaded ZnO-HMD@ZnO materials exhibited the highest capacity for hydrogen storage. The excellent stability and performance of the ZnO-HMD@ZnO-Fe/Cu core-shell make it an efficient candidate for hydrogen storage.
S Alini - One of the best experts on this subject based on the ideXlab platform.
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the catalytic hydrogenation of adiponitrile to Hexamethylenediamine over a rhodium alumina catalyst in a three phase slurry reactor
Journal of Molecular Catalysis A-chemical, 2003Co-Authors: S Alini, A Bottino, G Capannelli, R Carbone, A Comite, Giovanni VitulliAbstract:Abstract Adiponitrile was hydrogenated to Hexamethylenediamine in a three phase stirred slurry reactor at 353 K and 3 MPa using rhodium on γ-alumina powder as a catalyst. Rhodium, with a very high metal dispersion, was deposited on the alumina support using the metal vapour synthesis technique. The performances of this supported catalyst were compared to those of one currently used in industrial processes (Raney Ni). The Rh/Al 2 O 3 catalyst showed interesting Hexamethylenediamine selectivity and adiponitrile conversion. Both the temperature and pressure positively influenced conversion and selectivity, and under a certain pressure threshold the formation of Hexamethylenediamine was negligible.
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The catalytic hydrogenation of adiponitrile to Hexamethylenediamine over a rhodium/alumina catalyst in a three phase slurry reactor
Journal of Molecular Catalysis A-chemical, 2003Co-Authors: S Alini, A Bottino, G Capannelli, R Carbone, A Comite, Giovanni VitulliAbstract:Abstract Adiponitrile was hydrogenated to Hexamethylenediamine in a three phase stirred slurry reactor at 353 K and 3 MPa using rhodium on γ-alumina powder as a catalyst. Rhodium, with a very high metal dispersion, was deposited on the alumina support using the metal vapour synthesis technique. The performances of this supported catalyst were compared to those of one currently used in industrial processes (Raney Ni). The Rh/Al 2 O 3 catalyst showed interesting Hexamethylenediamine selectivity and adiponitrile conversion. Both the temperature and pressure positively influenced conversion and selectivity, and under a certain pressure threshold the formation of Hexamethylenediamine was negligible.
Nabil Bouazizi - One of the best experts on this subject based on the ideXlab platform.
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Synthesis and properties of ZnO-HMD@ZnO-Fe/Cu core-shell as advanced material for hydrogen storage
Journal of Colloid and Interface Science, 2017Co-Authors: Nabil Bouazizi, T. Boudharaa, Radhouane Bargougui, Julien Vieillard, S. Ammar, Franck Le Derf, A. AzzouzAbstract:In this paper, a new synthetic strategy towards functionalized ZnO-HMD@ZnO-Fe/Cu core-shell using sol-gel process modified by chemical grafting of Hexamethylenediamine (HMD) on the core and in-situ dispersion of Cu0/Fe0 as metallic nanoparticles (M-NPs) on the shell. The as-prepared core-shell materials were fully characterized by transmission electron microscopy, X-ray powder diffractometry, diffuse reflectance and FT-IR spectrophotometery, photoluminescence, and complexes impedance spectroscopy measurements. The XRD patterns agreed with that of the ZnO typical wurtzite structure, indicating good crystallinity of ZnO-HMD@ZnO-Fe/Cu, with the presence of Fe0 and Cu0 phases. Hexamethylenediamine grafting and M-NPs insertion were highly activated and enhanced the core and shell interface by the physiochemical interaction. After functionalization, luminescence intensities and electrical properties of both core and core-shell nanoparticles are improved, indicating the effects of the surface groups on the charge transfer of ZnO-HMD@ZnO-Fe/Cu. The hydrogen capacity retention was depended strongly on the composition and structure of the obtained core-shell. Iron/Copper-loaded ZnO-HMD@ZnO materials exhibited the highest capacity for hydrogen storage. The excellent stability and performance of the ZnO-HMD@ZnO-Fe/Cu core-shell make it an efficient candidate for hydrogen storage.
G Capannelli - One of the best experts on this subject based on the ideXlab platform.
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the catalytic hydrogenation of adiponitrile to Hexamethylenediamine over a rhodium alumina catalyst in a three phase slurry reactor
Journal of Molecular Catalysis A-chemical, 2003Co-Authors: S Alini, A Bottino, G Capannelli, R Carbone, A Comite, Giovanni VitulliAbstract:Abstract Adiponitrile was hydrogenated to Hexamethylenediamine in a three phase stirred slurry reactor at 353 K and 3 MPa using rhodium on γ-alumina powder as a catalyst. Rhodium, with a very high metal dispersion, was deposited on the alumina support using the metal vapour synthesis technique. The performances of this supported catalyst were compared to those of one currently used in industrial processes (Raney Ni). The Rh/Al 2 O 3 catalyst showed interesting Hexamethylenediamine selectivity and adiponitrile conversion. Both the temperature and pressure positively influenced conversion and selectivity, and under a certain pressure threshold the formation of Hexamethylenediamine was negligible.
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The catalytic hydrogenation of adiponitrile to Hexamethylenediamine over a rhodium/alumina catalyst in a three phase slurry reactor
Journal of Molecular Catalysis A-chemical, 2003Co-Authors: S Alini, A Bottino, G Capannelli, R Carbone, A Comite, Giovanni VitulliAbstract:Abstract Adiponitrile was hydrogenated to Hexamethylenediamine in a three phase stirred slurry reactor at 353 K and 3 MPa using rhodium on γ-alumina powder as a catalyst. Rhodium, with a very high metal dispersion, was deposited on the alumina support using the metal vapour synthesis technique. The performances of this supported catalyst were compared to those of one currently used in industrial processes (Raney Ni). The Rh/Al 2 O 3 catalyst showed interesting Hexamethylenediamine selectivity and adiponitrile conversion. Both the temperature and pressure positively influenced conversion and selectivity, and under a certain pressure threshold the formation of Hexamethylenediamine was negligible.