Osaka Gas Company Limited

Aisin Seiki Kabushiki Kaisha

Minoru Suzuki

Masamichi Ippommatsu

Shoji Otoshi

Hisao Ohnishi

Hirokazu Sasaki

Yuji Ikeda

Akira Hirano

Tsuyoshi Nakajima

Masashi Nishigaki

Tsuyoshi Tsurutani

Masamichi Ipponmatsu

Mitsuaki Echigo

Osamu Okada

Susumu Takami

Hiroki Ohkawara

Shin Iwata

Atsuko Kajimura

Horikazu Sasaki

A fuel cell system includes a source gas passage including a first desulfurizer that has a desulfurization performance relative to a source gas having a relatively higher dew point, and a second desulfurizer that has the desulfurization performance relative to a source gas having a relatively lower dew point and the source gas having the relatively higher dew point. The desulfurization performance of the second desulfurizer relative to the source gas having the relatively higher dew point is lower than the desulfurization performance of the second desulfurizer relative to the source gas having the relatively lower dew point. The first desulfurizer, the second desulfurizer, and a flowmeter are arranged at the source gas passage in the aforementioned order from an upstream side to a downstream side of the source gas passage in a flow direction of the source gas.

Fuel cell system

The object of the present invention is to obtain a carbon-monoxide removing technique capable of very effectively reducing/removing carbon monoxide present at one thousand of ppm to several % in a hydrogen-rich treatment-object gas such as a reformed gas obtained by reforming of a fuel such as natural gas, methanol, etc. to a concentration of several tens of ppm (preferably 10 ppm) or lower without excessive loss of hydrogen, even when carbon dioxide, methane are co-existent For accomplishing this object, there are provided two stages of CO removers for removing carbon monoxide from a hydrogen-containing treatment-object gas, the first-stage CO remover removing a portion of the carbon monoxide by methanation thereof through a catalyst reaction, the second-stage CO remover removing the remaining portion of the carbon monoxide mainly by oxidation thereof through a further catalyst reaction involving addition of an oxidizing agent.

System for removing carbon monoxide and method for removing carbon monoxide

The disclosed method of measuring the flow of a fluid with a porous particulate ceramic tracer and an optical instrument is characterized in that spherical particles having diameters in the range of 0.5 to 150 &#x3bc;m are used as the tracer. Inasmuch as the tracer particles for flow measurement are spherical, the sectional area of scattered light to be detected by an optical sensor means is constant regardless of the orientation of particles. Furthermore, spherical particles have no surface irregularities that might cause concatenation so that individual particles are not agglomerated in tracking a fluid flow, thus contributing to improved measurement accuracy.

Method for measuring the flow of fluids

The invention relates to a fuel electrode for high-temperature solid electrolyte fuel cells and a process for manufacture of the electrode. The fuel electrode of the invention is a porous element composed of a high-melting metal, such as ruthenium, osmium, rhodium or iridium, or an alloy containing the metal. The process for manufacture of the fuel electrode comprises coating an electrode material with a solution or dispersion of the high-melting metal and/or its chloride, sintering the same and finally reducing the product.

Fuel electrode for solid electrolyte fuel cells and a method for manufacture of the electrode

Fuel electrode for solid electrolyte fuel cells and a method of manufacturing the electrode

The disclosed method of measuring the flow of a fluid with a porous particulate ceramic tracer and an optical instrument is characterized in that spherical particles having diameters in the range of 0.5 to 150 &mgr;m are used as the tracer. Inasmuch as the tracer particles for flow measurement are spherical, the sectional area of scattered light to be detected by an optical sensor means is constant regardless of the orientation of particles. Furthermore, spherical particles have no surface irregularities that might cause concatenation so that individual particles are not agglomerated in tracking a fluid flow, thus contributing to improved measurement accuracy.

The disclosed method of measuring the flow of a fluid with a porous particulate ceramic tracer and an optical instrument is characterized in that spherical particles having diameters in the range of 0.5 to 150 .mu.m are used as the tracer. Inasmuch as the tracer particles for flow measurement are spherical, the sectional area of scattered light to be detected by an optical sensor means is constant regardless of the orientation of particles. Furthermore, spherical particles have no surface irregularities that might cause concatenation so that individual particles are not agglomerated in tracking a fluid flow, thus contributing to improved measurement accuracy.

Fuel electrode for solid electrolyte fuel cells and a method for

The invention relates to a method of producing interconnectors for solid oxide electrolyte fuel cells (SOFC). The method of the invention is characterized in that a compact thin film to serve as an interconnector is formed on a substrate by the laser ablation method. By this method, interconnectors made of a compact thin film highly accurate in composition can be produced with high productivity.

Growing community of inventors

Suita, Japan

Minoru Suzuki