Toshiba Mitsubishi-Electric Industrial Systems Corporation

Mitsubishi Electric Corporation

Ryohei Ueda

Yoichiro Tabata

Yujiro Okihara

Tetsuya Saitsu

Yasuhiro Tanimura

Koji Ohta

Nobuyuki Itoh

Noriyuki Nakamura

Koji Ota

One ozone concentrating chamber is provided therein with a part of a cooling temperature range where ozone can be selectively condensed or an oxygen gas can be selectively removed by transmission from an ozonized oxygen gas, and a part of a temperature range where condensed ozone can be vaporized, and condensed ozone is vaporized by moving condensed ozone with flow of a fluid or by gravitation to the part where condensed ozone can be vaporized, whereby the ozonized oxygen gas can be increased in concentration. Such a constitution is provided that a particle materialfor condensation and vaporization filled in the ozone concentrating chambersandhas a spherical shape of a special shape with multifaceted planes on side surfaces, or an oxygen transmission membranecapable of selectively transmitting an oxygen gas in an ozone gas is provided.

Apparatus for concentrating and diluting specific gas and method for concentrating and diluting specific gas

An apparatus for producing high-concentration ozone gas has a plurality of adsorption/desorption columns and a plurality of valves capable of switching opening/closing of the passage of gas flowing into or out of the adsorption/desorption columns, such that each of the adsorption/desorption columns can performs ozone adsorption processing, evacuation processing or desorption processing. At least two of the adsorption/desorption columns are placed in a serial cycle arrangement to constitute a main adsorption/desorption column group, and one or more of the other adsorption/desorption columns is placed in parallel with the main adsorption/desorption column group to constitute an auxiliary adsorption/desorption column. The auxiliary adsorption/desorption column performs desorption processing during a period in which none of the adsorption/desorption columns of the main adsorption/desorption column group is performing desorption processing.

Apparatus for producing high-concentration ozone gas and method of producing high-concentration ozone gas

Provided is an ozone concentrator including an ozone generator (), adsorption/desorption columns () in which silica gel () cooled with a certain-temperature refrigerant () for concentrating ozone generated by the ozone generator () is packed, a refrigerating machine () for cooling the refrigerant (), a vacuum pump () for enhancing a concentration of the ozone in one of the adsorption/desorption columns () by discharging mainly oxygen from the silica gel () adsorbing the ozone, a plurality of valves () to () for air pressure operations, for switching passages of gas that is allowed to flow in or flow out with respect to the adsorption/desorption columns (), and ozone concentration meters () for measuring the concentration of the ozone enhanced by the vacuum pump (), in which a discharge line of the vacuum pump () is connected to another one of the adsorption/desorption columns (), whereby the ozone is allowed to pass through another one of the adsorption/desorption columns again. Therefore, stable ozone of high concentration can be generated at a satisfactory energy efficiency without any temperature difference between upper and lower positions of adsorption/desorption columns.

Ozone concentrator

This invention provides a new photocatalyst material producing apparatus and photocatalyst material producing method that can produce a large quantity of photocatalyst material of high quality by a chemical reaction in light high-field plasma in a highly oxidative high-concentration ozone medium state, instead of systems to produce a photocatalyst material by PVD and CVD, which are conventional dry deposition methods. In a photocatalyst material producing method and photocatalyst material producing apparatus according to this invention, a pair of facing electrodes are provided via a dielectric material in a discharge gap where gas mainly containing oxygen gas is supplied, and an AC voltage is applied between the electrodes to generate dielectric barrier discharge (silent discharge or creeping discharge) in the discharge gap. Thus, oxygen gas containing ozone gas is created and a metal or metal compound is modified to a photocatalyst material by the dielectric barrier discharge.

Growing community of inventors

Tokyo, Japan

Ryohei Ueda