Patent ID: 8361205

Claim:
An adsorbent bed structure for use in an adsorbent-based gas separation process comprising a plurality of modular compact adsorbent bed units, each modular adsorbent bed unit having: a) a feed inlet manifold for receiving feed gas, b) a first gas channel for receiving the feed gas from the feed inlet manifold, c) interior space for moving the feed gas through an adsorbent material confined within the space, d) a second gas channel for receiving product gas exiting the adsorbent material, and e) a product outlet manifold for receiving the product gas from the second gas channel, wherein a first modular adsorbent bed unit is in gas flow communication with at least one other modular adsorbent bed unit in a generally axial direction by a common gas channel created by the connection of the first modular adsorbent bed to the other modular adsorbent bed unit and wherein the adsorbent bed structure is created by the stacked connection of two or more modular adsorbent bed units having generally cylindrical outer side walls and the adsorbent material is densely packed having a bed voidage of less than 40%.