NOVELTY - An electrical current generation system comprises a rotary adsorption module fluidly connected to an anode exhaust outlet and an anode inlet of fuel cell and operable to receive exhaust gas from outlet, separate and enrich usable fuel gas from the exhaust gas by displacement purge adsorptive mechanism, and deliver portion of the enriched usable fuel gas for export from the generation system as fuel for external use in a downstream system.    USE - For generating electrical current (claimed).    ADVANTAGE - The assembly enables selective generation of electrical power, hydrogen fuel and/or usable heat, allowing flexible operation of the generation system.    DETAILED DESCRIPTION - An electrical current generation system comprises a high temperature fuel cell having an anode inlet and an anode exhaust outlet; and a rotary adsorption module fluidly connected to the anode exhaust outlet and the anode inlet and operable to receive exhaust gas from the anode exhaust outlet, to separate and enrich usable fuel gas from the exhaust gas by displacement purge adsorptive mechanism, and to deliver at least a portion of the enriched usable fuel gas for export from the generation system as fuel for external use in a downstream system.    An INDEPENDENT CLAIM is also included for a process for generating electrical current comprising:    (i) providing a high temperature fuel cell having an anode inlet and an anode exhaust outlet and a rotary adsorption module;    (ii) providing anode exhaust gas from the anode exhaust outlet as a feed gas mixture to the rotary adsorption module;    (iii) separating and enriching usable fuel gas from the anode exhaust gas by adsorptive mechanism in the rotary adsorption module; and    (iv) providing at least a portion of the enriched usable fuel gas for export from the generation system for use as fuel for external use in a downstream system.    DESCRIPTION OF DRAWING(S) - The figure shows an axial section of a rotary adsorption module.    Adsorbers (3)    Adsorber housing body (4)    End (6)    Axis (7)    Functional bodies (8, 9)    First valve face (10)    Second valve face (11)    Planes (12'-17')    First zone (26)    Second zone (28)    Port (30)    First stator valve face (100)    Second stator valve face (101)    Circumferential seals (106, 107)    Angular sectors (111, 112, 121, 122)    Conduit (131-133)