TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Generator: The particles of the active structure consist of a single element of silicon, titanium, nickel or samarium; or fluorinated carbon. The active structures are in plate form, and are constructed so that a fluid and a vapor separate rapidly from the inside of the vessel, or are positioned so that the vapor stops the liquid from damaging it by contact. They are arranged perpendicular to the vessel, partitioning it vertically. The vessel has a heater which heats the structures directly, and a vibrator to vibrate the structures. The material for processing is water, aqueous solvent and/or hydrocarbon. It is made to circulate inside the vessel. The contact surfaces of the active structure and the material move vertically in opposite directions. EXAMPLE - A hydrogen generator was made by introducing 100 cm3 of spherical silicon particles (P1) of diameter 5-80 microns (maximum 150 microns) and purity 98.0% into a 300 cm3 triangular flask (102) in layers to give a hydrogen generator (100) containing active structures. The flask (102) was mounted on a heater (101) and connected to a collection bottle (105) in a tank (103) filled with water and ice by a tube (106). The connection was gas-tight. The temperature in the water tank (103) was kept below 10 degrees C to prevent the pressure in the collection bottle (105) from dropping below room pressure, from the pre-condensed water vapor, when it was removed from the tank. The separation of the vapor in the bottle (105) was recognized in the preliminary experiment, silicon chips (107) were introduced into the collection bottle in sufficient quantity before analysis by gas chromatography. Then, in this structure, pure water at 92 degrees C was filled into the collection bottle (105) in volume of 164 cc from the flask (102), and the vapor generated was collected in the bottle (105) while maintaining this temperature. The gas consisted of 78 (volume)% hydrogen, 5% oxygen and 17% other gasses. The experiment was conducted without irradiation of sunlight and away from direct illumination from room lights