Design of Some Oxide/Metal Composite Supports and Catalysts
1st Asian Symposium on Advanced Materials
01-04 Oct 2007
, E-ISSN: 1568-5543
||ALUMINUM containing powders, Catalytic activity, Ceramometals (cermets), Mechanical properties, Porosity
Boreskov Institute of Catalysis SB RAS, Novosibirsk 630090, Russia
Novosibirsk State University, Novosibirsk 630090, Russia
Textural, mechanical and catalytic properties of porous composite materials Al2O3/Al, MeO x (Me)/Al2O3/Al with metal particles homogeneously distributed in the alumina matrix were studied. These materials were prepared by mixing the powdered components with aluminum followed by hydrothermal treatment and calcination. The macroporous structure was shown to be controlled by the size of large (>microns) particles in starting blends. The mesoporous structure is primarily determined by the properties of alumina formed by dehydration of hydroxide produced in turn via aluminum oxidation by water. The mechanical strength of porous cermets is determined by the number and properties of contacts between micron-size components of composites. Improved catalytic performance of composites is ensured by the developed macroporous structure providing enhanced mass transfer inside the cermet granules.