文献类型：期刊文献

英文题名：Characterisation and modelling of metal deposition in catalytic composite membranes

作者：Wehbe, N.[1]; Sanchez, A. Bonilla[2]; Dalrnon, J.-A.[1]; Guilhaume, N.[1]; Homs, N.[2]; Li, Y.[3]; Miachon, S.[1]; De La Piscina, P. Rarnirez[2]

机构：[1] Institut de Recherches sur Ia Catalyse et l'Environnement de Lyon [IRCELYON], UMR 5256 CNRS-Université Claude Bernard Lyon 1, 2 Avenue Albert Einstein, F-69626 Villeurbanne Cédex, France; [2] Departament de Química Inorganica, Universitat de Barcelona, Marti i Franques 1-11, 08028 Barcelona, Spain; [3] School of Materials Science and Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China

年份：2009

卷号：21

期号：1

起止页码：57

外文期刊名：Reviews on Advanced Materials Science

收录：EI(收录号：20095212573679)

语种：英文

外文关键词：Alumina - Aluminum oxide - Chemical analysis - Deposition - Impregnation - Acetone - Composite membranes - Titanium dioxide - Metals

摘要：A wet impregnation technique based on the evaporation-crystallisation method was used to prepare mono- and bi-metallic catalytic membranes, using Al2O3 or TiO2 multilayer porous tubes with a top-layer pore size of 5, 10, 25, 30 or 100 nm. The metal deposition was characterized by weight uptakes, chemical analyses, SEM-EDS and XPS analyses. In all tubes with a mesoporous top-layer bearing pores of 5, 10 or 25 nm, whatever the nature of the tube and the impregnation solvent (water or acetone), a strong metal enrichment was evidenced in the top-layer. This enrichment was less noticeable in tubes with a 30 or 100 nm top-layer pore size. A mathematical model describing the metal salts deposition during the drying step is proposed. This model is discussed in relation with the physical parameters involved in the drying of complex porous systems. Copyright ? 2009 Advanced Study Center Co. Ltd.