Nippon Shokubai Co., Ltd.

Kuninori Miyazaki

Tohru Ishii

Takaaki Hashimoto

Yusuke Shiota

Junichi Miyake

Masatoshi Ikeda

The objective of the present invention is to provide a steam electrolysis cell of which current efficiency is high and by which hydrogen can be efficiently produced, and a method for producing hydrogen using the steam electrolysis cell. The steam electrolysis cell according to the present invention is characterized in comprising an anode layer, a cathode layer, and a proton conducting oxide electrolyte layer between the anode layer and the cathode layer, wherein the anode layer comprises a perovskite oxide, and the perovskite oxide comprises Ba and Co.

Steam electrolysis cell

The invention provides a method for treating waste water wherein organic and inorganic substances in waste water can be treated at high levels regardless of the concentration, and a unit itself can be made compact. The method of the invention is a method for treating waste water, which comprises treating waste water at 100&#xb0; C. or less in the presence of oxygen and catalyst containing noble metal and active carbon and having pores, wherein the volume of pores having a radius of 40 &#x212b; or more and less than 100 &#x212b; is 0.05 ml/g or more.

Method for treating waste water

A method is provided for oxidizing and/or decomposing organic and/or inorganic oxidizable substances in waste water by wet oxidation with a use of a catalyst, wherein the oxidizable substances are oxidized and/or decomposed with an oxygen containing gas in the presence of the catalyst under pressure such that the waste water retains the liquid phase thereof at a temperature of 50&deg; C. to less than 170&deg;C.; the catalyst contains activated carbon; and the oxygen concentration is controlled in an exhaust gas in the range from 0 to 5 vol %. The present inventive method is capable of treating waste water efficiently for a long period in a stable manner at reduced temperatures as compared with the substantially higher temperatures and pressures used in many of the prior art methods.

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Himeji, Japan

Kuninori Miyazaki