Patent ID: 6602407
Filing Date: 2003-08-05
Classification: B01D,B01J,C02F,Y02W

Abstract:
An oriented structure for treating a fluid, the structure comprising:an inlet end for receiving a fluid to be treated and an outlet end opposite the inlet end and from which a treated fluid is discharged, the fluid being allowed to flow into the structure from the inlet end to the outlet end defining a flowing direction; a juxtaposition of layers of porous material having a different porosity, each layer spanning from the inlet end to the outlet end of the structure whereby in use the layers are oriented generally parallel to the flowing direction of the fluid, wherein the juxtaposition of layers comprises layers of a first material having a first porosity chosen so as to create a zone of dynamic hold-up of the fluid alternating with layers of a second material having a second porosity chosen so as to create a static hold-up of the fluid, thereby promoting internal exchanges of the fluid between the zone of dynamic hold-up and the zone of static hold-up.