NOVELTY - The process involves introducing a lower-saline material i.e. saline seawater stream, into lower-saline material compartments (40). A lower-saline material effluent is heated to volatilize and remove thermolytic or dissolved heat regenerable salt for producing regenerated lower-saline material or to volatilize and remove water by membrane distillation for producing regenerated saline material. The regenerated lower-saline material is introduced into the lower-saline material compartments or into saline material compartments (30) i.e. cathode compartments.    USE - Process for generating hydrogen gas through reverse electro-dialysis from an energy source e.g. organic matter solution-in domestic and industrial waste water, sea water and river water, for a point-of-use i.e. hydrogen gas powered device.    ADVANTAGE - The process enables a quaternary ammonium-containing poly catalyst binder to be optionally used when ammonium bicarbonate is present in a catholyte so as to improve system performance. The process enables salinity driven energy to be provided by reverse electro-dialysis subunits so as to eliminate need for an external power source to produce the hydrogen gas. The process enables an anode to be treated with ammonia gas process so as to increase power production and reduce time needed to generate power once reactor is inoculated. The process enables number of reverse electro-dialysis subunits to be preferably in range of 1-10 subunits coupled with an optimized flow scheme so as to minimize energy losses due to pumping solutions. The process enables providing seals between the saline material compartments in an ion selective barrier pair so as to inhibit fluid leakage between adjacent compartments. The process enables rate of power or hydrogen production to be controlled by setting flow rate of the saline material and the lower- saline material such that aeration of water is avoided if dissolved oxygen is used at cathode for reduction purposes. The process enables lower-saline material and saline material to be replaced in a batch mode or by continual flow by external pumping of the saline material and the lower-saline material into corresponding compartments and removal of the effluent so as to avoid reduction in current output and hydrogen generation operation. The process allows salts present in the lower-saline material to minimize resistive loss in reverse electro-dialysis subunits and a stack.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a system for generating hydrogen gas.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic cross-sectional view of a hydrogen gas generating system with a reaction chamber and an exterior of the reaction chamber.    Saline material compartments (30)    Lower-saline material compartments (40)    Anode (70)    Anode compartment (75)    Reaction chamber (100)