Particularly valuable in catalytic reformers inside petroleum refineries and also the petrochemical catalytic market. Accordingly, in a broad embodiment the existing invention can be an improved scalloped shaped conduit for contacting particles and fluid within a circumferential arrangement of scallops about the inside from the vessel. A plurality of longitudinally https://radialflowcenterpipe67776.bluxeblog.com/65401786/how-radial-flow-reactor-scallop-can-save-you-time-stress-and-money