Hitachi Zosen Corporation

Kyoto University

Newtech LLC

Kanadevia Corporation

Volcano Co., Ltd.

Emi Shono

Susumu Hikazudani

Satoshi Yoshida

Kazuyuki Hirao

Kana Shimizu

Kazuto Matsumoto

Heidy Visbal

Tsugumi Nishi

Takeko Matsumura

Takahiro Fujibayashi

Minami Hirano

Kenji Ono

Takuma Mori

Masaki Kobayashi

Hirofumi Yasuda

Kenji Sato

Hironaka Tanaka

An exhaust gas treatment apparatus includes a treatment cabinet and a catalyst part. To the treatment cabinet, introduced is exhaust gas of an engine which uses gas containing methane as a fuel. The catalyst part is accommodated in the treatment cabinet and oxidizes unburned methane contained in the exhaust gas. When a temperature of the catalyst part is lower than a predetermined normal operating temperature, the catalyst part oxidizes carbon monoxide contained in the exhaust gas and uses oxidation reaction heat of carbon monoxide, to thereby raise the temperature of the catalyst part up to the normal operating temperature or higher. Even when the temperature of the exhaust gas supplied to the catalyst part is lower than the normal operating temperature, it is thereby possible to quickly raise the temperature of the catalyst part up to the normal operating temperature por higher.

Exhaust gas treatment apparatus, engine system, and exhaust gas treatment method

The present invention provides a novel method for producing a calcium aluminate compound having a modified surface. The present invention provides: a method for producing a modified calcium aluminate compound characterized by irradiating a calcium aluminate compound dispersed in an organic dispersion medium with a femtosecond laser, thereby modifying the surface of the calcium aluminate compound; and a modified calcium aluminate compound characterized by being obtained by this method and having at least one of an OH group, a CO group, a CH group, and an NH group.

Modified calcium aluminate compound and production method therefor

One object is to provide a useful aldehyde decomposition catalyst, and an exhaust gas treatment apparatus and an exhaust gas treatment method using the aldehyde decomposition catalyst that achieve low cost and sufficient aldehyde decomposition performance with a small amount of the catalyst. An aldehyde decomposition catalyst of the present invention is made of a zeolite in a cation form NHhaving a structure of CHA or MOR and carrying Cu.

Aldehyde decomposition catalyst, and exhaust gas treatment apparatus and exhaust gas treatment method

The present invention addresses the problem and purpose of providing a honeycomb structure that has a sufficiently high strength and is excellent in endurance, and a catalyst for cleaning an exhaust gas using the same that is excellent in resistance to sulfur oxide (SOX). The honeycomb structure of the present invention is one consists of a flat inorganic fiber sheet comprising an inorganic fiber sheet having supported thereon an inorganic binder and zeolite, and a corrugated inorganic fiber sheet comprising an inorganic fiber sheet having supported thereon the same inorganic binder and zeolite, which are alternately combined with each other, wherein it is characterized in that the zeolite has a particle diameter (i.e., a median particle diameter, D50) of from 0.5 to 10.0 &#x3bc;m.

Honeycomb structure and catalyst for cleaning exhaust gas using same, and method for producing catalyst for cleaning exhaust gas

An object of the present invention is to provide a method for producing conductive mayenite, with which a reaction is completed in a short time, an operation can be simplified, the reaction is easily controlled, and the cost of energy can be reduced. The present invention is a method for producing conductive mayenite, characterized by mixing a mayenite type compound with a carbon component, placing the resulting mixture in an airtight container, and irradiating the mixture with a microwave in an inert gas atmosphere or in a vacuum atmosphere to heat the mixture.

Method for producing conductive mayenite type compound

To provide a catalyst for purifying a combustion exhaust gas and a method for purifying a combustion exhaust gas. The denitration catalyst used in a method for purifying a combustion exhaust gas of removing a nitrogen oxide in the exhaust gas by making the catalyst into contact with the combustion exhaust gas having an alcohol as a reducing agent added thereto, contains zeolite as a support having supported thereon a catalyst metal, in a powder X-ray diffraction (XRD) measurement of the denitration catalyst a ratio (relative peak intensity ratio) r=I/J of a height I of a diffraction peak at a diffraction angle (2&#x3b8;) of from 7.8 to 10.0&#xb0; and a height J of a diffraction peak at a diffraction angle (2&#x3b8;) of from 28.0 to 31.0&#xb0; being in a range of from 3.0 to 5.0.

Catalyst for purifying combustion exhaust gas, and method for purifying combustion exhaust gas

Growing community of inventors

Osaka, Japan

Emi Shono