Adsorber is more parallel passage contactors

Element adsorption for the purification or separation of a fluid, comprising: - M modules ((3), (4), (5) ...) in parallel, with M> 2, each module being spaced from the adjacent module by a volume (17) and comprising at least one switch in parallel passages, - an inlet section (6), and - an output section (7), and characterized in that the ratio of the volume of adsorbent included in the modules M the free volume available to the fluid, between the inlet and the outlet section of said element section is greater than 0.75%.