NOVELTY - A electric power generation system (10) comprises a fuel cell module comprising electrochemical fuel cell comprising an anode for promoting electrocatalytic conversion of a portion of fuel delivery module outlet discharged liquid fuel stream to cations and an anode exhaust stream (67a-67e) having unreacted fuel stream constituents and anode reaction product; a cathode for promoting electrocatalytic reaction of the cations with an oxidant stream directed to the cathode; and a cation exchange membrane interposed between the anode and the cathode.    USE - For generating electric power for portable electronic devices such as laptop computers and cellular telephones.    ADVANTAGE - The system enables recycling of unreacted formic acid in liquid form, while vaporous fuel present in the anode exhaust stream is separated from liquid formic acid in a gas-liquid separator, and the vaporous fuel is then consumed and converted in a vapor cell to form benign reaction product of carbon dioxide and water.    DETAILED DESCRIPTION - A electric power generation system comprises:    (1) a fuel cartridge module comprising a cartridge housing having an interior cavity and an exterior surface; a cartridge liquid fuel stream port encompassed by the housing exterior surface and having a sealable valve accommodating bidirectional flow of the liquid fuel stream into and out of the cartridge module; a bladder disposed within the interior cavity and capable of storing, delivering and receiving a quantity of the liquid fuel stream; a compression mechanism for imparting a minimal positive fluid pressure to the bladder; a pressure relief valve for discharging a gaseous stream from the cartridge housing at a set pressure; and a vacuum relief valve for drawing a gaseous stream into the interior cavity to inhibit formation of a vacuum within the cartridge housing;    (2) a fuel delivery module comprising a fuel delivery module inlet fluidly connected to the cartridge liquid fuel stream port, and having a sealable valve accommodating bidirectional flow of the liquid fuel stream into and out of the cartridge module; a fuel delivery module outlet for discharging a liquid fuel stream for electrocatalytic conversion in a fuel cell (62a-62e) to cations and reaction product; a pump interposed in a fuel delivery conduit for directing the liquid fuel stream between the fuel delivery module inlet and the fuel delivery module outlet; and a recycle liquid fuel stream inlet fluidly connected to the fuel delivery conduit at a junction between the fuel delivery module inlet and the pump;    (3) a fuel cell module comprising at least one electrochemical fuel cell comprising an anode for promoting electrocatalytic conversion of a portion of the fuel delivery module outlet discharged liquid fuel stream to cations and an anode exhaust stream comprising unreacted fuel stream constituents and anode reaction product; a cathode for promoting electrocatalytic reaction of the cations with an oxidant stream directed to the cathode, and electrically connected to the anode through a circuit comprising an electrical load, where electrons are drawn from the anode to the cathode through the circuit and a cathode exhaust stream (71a-71e) is produced; and a cation exchange membrane interposed between the anode and the cathode; and    (4) an exhaust module comprising an exhaust module inlet for receiving the fuel cell anode exhaust stream; an exhaust module outlet fluidly connected to the fluid delivery module recycle liquid fuel stream inlet; a gas-liquid separator interposed between the exhaust module inlet and the exhaust module outlet, and having a first chamber comprising an inlet for admitting the anode exhaust stream into the first chamber and an outlet for discharging a recycle liquid fuel stream, a second chamber comprising an outlet for discharging a gaseous exhaust stream comprising some of the unreacted fuel stream constituents and at least some of the anode reaction product, and a gas-liquid separator membrane interposed between the two chambers, and capable of permitting diffusion of a portion of the gaseous exhaust stream constituents from the first chamber to the second chamber; a vapor cell comprising an anode fluidly connected to the gas-liquid separator second chamber outlet and promoting electrocatalytic conversion of at least a portion of the gaseous exhaust stream to cations and a vapor cell anode exhaust stream comprising unreacted gaseous exhaust stream constituents, if any, and vapor cell anode reaction product, a cathode for promoting electrocatalytic reaction of cations produced at the vapor cell anode with an oxidant stream directed to the vapor cell cathode, the vapor cell cathode electrically connected to the vapor cell anode through a circuit comprising an electrical load, where electrons are drawn from the vapor cell anode to the vapor cell cathode through the circuit and a vapor cell cathode exhaust stream is produced, a cation exchange membrane interposed between the anode and the cathode, where the recycle liquid fuel stream is directed to the fuel delivery module outlet through the recycle fuel stream inlet and the fuel delivery conduit, and vaporous fuel in the anode exhaust stream is converted in the vapor cell to cations and reaction product.    The system further comprises a power management module comprising an electrical energy storage device including a storage battery and a capacitor.    DESCRIPTION OF DRAWING(S) - The figure is a schematic flow diagram of the electric power generation system.    Electric power generation system (10)    Fuel cell (62a-62e)    Anode exhaust stream (67a-67e)    Cathode exhaust stream (71a-71e)