NOVELTY - A multi-layer parallel passage adsorbent structure comprises adsorbent sheets containing at least one adsorbent material defining ideal selectivity between two components, and at least one adsorbent layer having particles of the adsorbent material. The dimensions of the adsorbent layer thickness and adsorbent particle radius are selected to maximize value of kinetic selectivity of adsorbent structure.    USE - For implementing a rapid cycle kinetic-controlled adsorptive separation between at least a first more rapidly adsorbed gas component (such as carbon dioxide) and a second less rapidly adsorbed gas component (such as methane) (claimed) in a rapid cycle kinetic-controlled PSA separation.    ADVANTAGE - The multi-layer parallel passage adsorbent structure has improved structure that enhances kinetic selectivity of kinetic-controlled adsorption processes, such as PSA, temperature swing adsorption (TSA) and partial pressure swing or displacement purge adsorption (PPSA) processes. The structure enables significant intensification of kinetic adsorption processes relative to attainable performance with conventional adsorbed materials in beaded or extruded form. This provides increased adsorption cycle frequencies, and increased gas flow velocities within adsorbent beds, which may increase the productivity of a kinetic adsorption system. Thus increase in productivity, reduces adsorbent material inventory for a given system capacity, resulting in smaller, lower cost deposition systems, and potentially enabling the use of kinetic adsorption system in cost and/or space sensitive separation application for which adsorption systems were previously unviable. The kinetic adsorbent structures may enable kinetic separations that could not be achieved at all with conventional adsorbents in packed bed adsorbers, due to the freedom of the inventive adsorbent structures from some limitations in cycle frequency and/or gas flow velocity suffered by conventional adsorbent materials in packed adsorber beds.    DETAILED DESCRIPTION - The maximize value of kinetic selectivity of adsorbent structure implements rapid-cycle kinetic-controlled adsorptive separation relative to ideal kinetic selectivity of the adsorbent material. The value of the ratio of the effective kinetic selectivity of the adsorbent structure to the ideal kinetic selectivity of the adsorbent material is at least 0.75 (preferably at least 0.95).    An INDEPENDENT CLAIM is included for a rapid cycle rotary pressure swing adsorption (PSA) device.