Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9685073 | Journal of Membrane Science | 2005 | 10 Pages |
Abstract
Pd and Pt/SiO2-Al2O3 tubular membranes were prepared with the aim of obtaining uniform pore size and precious metal distribution throughout the cross-section. Membrane permeability was controlled by depositing silica inside the pores of α-Al2O3 supports. This was achieved by immersing the support inside colloidal silica solution followed by freeze-drying and calcination. Various techniques were evaluated in order to avoid the formation of a thin SiO2 layer on the external support surface. Pt and Pd were introduced by impregnation of the SiO2-Al2O3 membrane with hexachloroplatinic acid and palladium nitrate solution, respectively. Freeze-drying provided more uniform metal distribution than conventional drying.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Filtration and Separation
Authors
Marcello Murru, Albertino Prabowo, Asterios Gavriilidis,