An ozone generator includes a high-voltage electrode and at least one counter electrode, which define an interstice in which at least one dielectric is arranged and through which a gas flows in the flow direction. The high-voltage electrode and the at least one counter electrode are provided with a connection for an electrical voltage supply to generate corona discharges which are discharged from surface discharge locations. The mean sparking distance and the mean spacing between the high-voltage electrode and the at least one counter-electrode are constant. The number of surface discharge locations decreases in the flow direction.

An ozone generator (100) includes a flow passage (1) having a cylindrical shape, an ozone generating unit (3) disposed in the flow passage (1), and a fan (2) disposed in the flow passage (1). When a specific frequency f is one of frequencies at which an air-column resonance occurs in the flow passage (1), ? is a wavelength of sound at the specific frequency f, and m is a natural number, at least a portion of the fan (2) is disposed within a range in which a distance from the inlet (5) in a height direction is (2m?1)?/8 or more and (2m+1)?/8 or less.

A cylindrical tank-shaped container including: plural parallel electrode tubes; discharge tubes arranged inside the electrode tubes, each forming a discharge gap; a pair of end plates that penetrate and hold both of end sections of the plural electrode tubes; a cooling space formed by the pair of end plates and the inner surface of the tank-shaped container divided between end plates; a cooling medium inlet and a cooling medium outlet formed in opposite end sides of the cooling space; a raw material gas inlet that introduces raw material gas to be sent to the discharge gaps; and an outlet for ozone gas generated from the raw material gas by silent discharge in the discharge gaps, providing an electrode tube in which a discharge tube is not arranged, among the plural electrode tubes, that have surrounding coolant medium that reaches at least a prescribed temperature resulting from the silent discharge.

This invention aims at improving the reliability of the electrode in an ozone generator, and also at shortening the start-up time of the ozone generator after the maintenance. The ozone generator comprising; a dielectric discharge tube, having a closed end and an open end which are faced each other, and including an electrode formed on an inner surface thereof, a sealing lid, covering the open end of the dielectric discharge tube and fixed to the dielectric discharge tube with an adhesive, a power supply brush, in inscribed contact with the electrode formed on the inner surface of the dielectric discharge tube, and a grounding electrode, arranged concentrically with the dielectric discharge tube; wherein the sealing lid includes a main body part and a cylinder part, which are connected together, and an inside diameter of the cylinder part is larger than an outside diameter of the dielectric discharge tube.

A Fischer-Tropsch catalyst activation system including separation apparatus configured for separating a product gas comprising primarily hydrogen from a gas stream comprising hydrogen, an activation reactor fluidly connected with the separation apparatus via an activation gas inlet line whereby the product gas may be introduced into the activation reactor, and a circulation loop fluidly connecting a gas outlet of the activation reactor with the activation gas inlet line or with another gas inlet of the activation reactor and fluidly connecting the activation reactor with one or more apparatus configured for removal of H.sub.2O. A method of activating a Fischer-Tropsch catalyst is also provided.

An ozone generator includes a high-voltage electrode and at least one counter electrode, which define an interstice in which at least one dielectric is arranged and through which a gas flows in the flow direction, the high-voltage electrode and the at least one counter electrode being provided with a connection for an electrical voltage supply to generate silent discharges, and a wire fabric being arranged in the gas flow and its density decreasing in the flow direction.

An ozone-generating apparatus includes: at least one discharge tube each including: a first electrode having a tubular shape extending along a first axis; a second electrode extending along the first axis; and a dielectric extending along the first axis and disposed between the first electrode and the second electrode; and an inhibiting member disposed on an end side of the first electrode and inhibiting at least either the second electrode or the dielectric from moving toward the end side.

An ozone generator includes one or more electrode pairs each containing two electrodes arranged at a distance of a predetermined gap length and a power source for applying an alternating-current voltage between the two electrodes. In the ozone generator, ozone is produced when a source gas flows at least between the two electrodes and a discharge is generated between the two electrodes. The ozone generator has a discharge space formed between the two electrodes, and the ozone generator satisfies the condition of 0.5<V/f/L wherein V (m/s) represents a flow velocity of the source gas flowing through the discharge space, f (Hz) represents a frequency of the alternating-current voltage, and L (m) represents a length of the discharge space in the main flow direction of the source gas.

An ozone injector device comprising a housing having a water passageway through the housing, an ozone inlet in fluid communication with the water passageway, a corona tube disposed within the housing and in fluid communications with the ozone inlet, and a clearing piston positioned to move into and out of the water passageway towards the ozone inlet, and configured to prevent flow of ozone into the water passageway.

A dielectric assembly for generating ozone includes a positive electrode, a negative electrode, a dielectric for generating the ozone, and a knob adapted to extend outside of a housing into which the dielectric assembly is to be placed. A system is also provided for sanitizing and deodorizing water, food, surfaces and air including a microbiological reduction filter device having an input connected to a water supply, a venturi injector disposed within a housing and connected to an output of the microbiological reduction filter device which generates ozone and mixes the generated ozone with the water, and an electrode assembly comprising a plurality of electrodes, a dielectric for generating the ozone, and a knob extending outside of the housing. The dielectric in a first embodiment and the entire dielectric assembly in a second embodiment can be removed from the housing and replaced in its entirety by the knob.