Patent ID: 8268043

Claim:
A adsorption bed structure used in cyclic adsorption processes comprised of: a) an enclosed housing with inlet means and outlet means, b) a plurality of a modular compact adsorbent bed units within the housing, each of the units comprised of two substantially parallel opposing gas permeable faces enclosed within perimeter side walls connected to the faces and wherein the distance between the modular adsorbent bed units is equal to or less than half of the modular adsorbent bed unit depth, c) adsorbent material densely packed within the units and having an inter-particle void fraction of less than 40%, d) a feed channel adjacent to one face of each of the units; e) a product channel adjacent to the opposing face of each of the units; and wherein a product gas flows into the housing through the inlet means through the adsorbent bed units and exits the adsorbent bed units through the product channel to the outlet means, and wherein the distance between the adsorbent bed units containing the feed channel and the product channels is equal to or less than half of the bed depth and the void volume ratio of the bed is less than 30%.