Extruded gamma-alumina catalyst support materials have been studied. Mixing gamma-alumina powders with a peptized boehmite (AlO(OH)) binder formed the experimental pastes. The moisture content of the pastes was high relative to conventionally bound dense granular materials due to the gel structure of the binder system and the high surface area and pore volume of the gamma-alumina powders. Where the gamma-alumina was formed at low temperature (360degreesC) a reaction to form gibbsite (Al(OH3)) took place during extrusion. This was not the case where the gamma-alumina was formed at high temperature. Despite the high moisture contents the behaviour of the intermediate boehmite/gamma-alumina pastes was shown to be strongly related to the packing behaviour of the two particulate phases.
|Journal||Chemical Engineering Research and Design|
|Publication status||Published - 1 Jul 2002|
- catalyst support