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Preparation and characterization of ultrathin palladium membranes / X. Li in Industrial & engineering chemistry research, Vol. 48 N°4 (Février 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N°4 (Février 2009) . - p. 2061–2065 Titre : Preparation and characterization of ultrathin palladium membranes Type de document : texte imprimé Auteurs : X. Li, Auteur ; T. M. Liu, Auteur ; D. Huang, Auteur Année de publication : 2009 Article en page(s) : p. 2061–2065 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Ultrathin  palladium  membrane  Photocatalytic  deposition  pretreatment  Electroless  modification  method Résumé : An ultrathin palladium membrane (1 μm) has been prepared by an improved photocatalytic deposition (PCD) pretreatment and the electroless modification method. SEM results demonstrated good adhesion of the plated palladium membrane on the porous composite TiO2 support and dense coalescence of the palladium membrane. The flux and H2/N2 selectivity of the palladium membrane were determined in the temperature range of 623−823 K and the pressure difference range of 0.02−0.15 MPa. At 673 K and 0.1 MPa pressure difference, the hydrogen permeation flux of the composite membrane was as high as 0.27 mol m−2 s−1, and the H2/N2 selectivity coefficient was 361. In this study, the activation energy of hydrogen permeation through the composite palladium membrane was 17 kJ/mol. The corrected pressure exponent for the palladium composite membrane was nearly 0.8 deviated from Sievert’s law. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8004644 [article] Preparation and characterization of ultrathin palladium membranes [texte imprimé] / X. Li, Auteur ; T. M. Liu, Auteur ; D. Huang, Auteur . - 2009 . - p. 2061–2065. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N°4 (Février 2009) . - p. 2061–2065 Mots-clés : Ultrathin  palladium  membrane  Photocatalytic  deposition  pretreatment  Electroless  modification  method Résumé : An ultrathin palladium membrane (1 μm) has been prepared by an improved photocatalytic deposition (PCD) pretreatment and the electroless modification method. SEM results demonstrated good adhesion of the plated palladium membrane on the porous composite TiO2 support and dense coalescence of the palladium membrane. The flux and H2/N2 selectivity of the palladium membrane were determined in the temperature range of 623−823 K and the pressure difference range of 0.02−0.15 MPa. At 673 K and 0.1 MPa pressure difference, the hydrogen permeation flux of the composite membrane was as high as 0.27 mol m−2 s−1, and the H2/N2 selectivity coefficient was 361. In this study, the activation energy of hydrogen permeation through the composite palladium membrane was 17 kJ/mol. The corrected pressure exponent for the palladium composite membrane was nearly 0.8 deviated from Sievert’s law. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8004644