TECHNOLOGY FOCUS - ELECTRICAL POWER AND ENERGY - Preferred Components: The mechanism which enables rotation of the electrolyte comprises an electric motor. The reactor comprises guide vanes or baffles on the outer surface of the chamber. The mechanism may comprise a rotatable impeller or baffle provided within the chamber. The inlets are provided in the peripheral walls of the chamber furthest from the axis of rotation. The inlet comprises sparging mechanism. The fuel cell further provides at least one structure defining outlet(s) for the removal of the oxidant and/or the fuel adjacent the axis of rotation. It comprises at least one trap for the collection and/or removal of electrochemical reaction by-products. It also has at least one compressor, which pressurizes the oxidant and/or fuel prior to introduction into the chamber. At least one low pressure turbine depressurizes oxidant and/or fuel after it leaves the chamber. A feedback mechanism regulates the flow of oxidant and/or fuel through the fuel cell to minimize undesirable vibrations which may occur due to non-uniform distribution of oxidant and/or fuel. The electrodes comprise porous electrically conductive material. The electrode (8) contactable with the oxidant comprises porous electrically conductive sodium-tungsten-bronze or porous electrically conductive carbon. The chamber additionally comprises a porous cage for containing the metal. It comprises internal baffles, which define passageways for the internal recirculation of the electrolyte (14). It is subdivided into smaller chambers to create electrochemical cells, which may be electrically connected to each other in series or in parallel. The mechanism enables the speed of rotation to be varied. The electrolyte may be rotated with its spin axis orientated in the vertical direction. The electric motor may be started by electrical energy provided by the stationary fuel cell. Preferred Process: The process further comprises regenerating the parent chemical fuel and oxidant from the reaction by-products.    TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Materials: The fuel is a metal and the oxidant is oxygen or air. The metal fuel is provided in the form of a powder or a porous block. The metal is aluminum, magnesium or zinc. The electrolyte comprises hydroxide ions or a solution of potassium or sodium hydroxide.