Multiple adsorbent loading method and apparatus for a radial flow vessel

A method for loading particles into a vessel to form a particle bed comprising inner and outer radially disposed concentric layers of particles, said inner layer containing at least a first type of particle of different granulometry or composition or both granulometry and composition from a second type of particle contained in said outer layer, the method comprising the steps of:

• (a) dispensing said first type of particles to form said inner layer at a uniform volumetric rate in a first particle stream by dropping said first stream while said first stream is in rotational motion from a predetermined height above said vessel, said first stream spanning a first predetermined radial location and radial width within the vessel;
• and
• (b) simultaneously with said step (a) dispensing said second type of particles to form said outer layer at the same volumetric rate in a second particle stream by dropping said second stream while said second stream is in rotational motion from said height, said second stream spanning second predetermined radial location and radial width within the vessel adjacent the inner layer, said inner and outer layer meeting at an interface;
• and
• (c) continuing said steps (a) and (b) while the particle bed is formed.