Japan Science and Technology Agency

Osaka Prefecture University Public Corporation

Samsung Electronics Co., Ltd.

Ngk Insulators, Inc.

University Public Corporation Osaka

Osaka Industrial Promotion Organization

Masaaki Okubo

Toshiaki Yamamoto

Tomoyuki Kuroki

Kitae Park

Jinkyu Kang

Hyun Chul Lee

Shinichi Miwa

Tadao Yagi

Hyoungwoo Choi

Joonseon Jeong

Haruhiko Yamasaki

Hidekatsu Fujishima

Keiichi Otsuka

Keiichiro Yoshida

An air purification device includes a reactor having a hollow shape and extending in one direction, a discharge plasma generator comprising a first electrode disposed on an outer wall of the reactor and a second electrode disposed inside the reactor, where the discharge plasma generator is configured to generate a discharge plasma in a discharge region, a plurality of dielectric particles disposed on a packed-bed of the reactor, a liquid supplier which supplies a liquid into the reactor, and a liquid recoverer which recovers the liquid discharged from the reactor.

Device and method for purifying air purification device and method

Disclosed are a method and an apparatus for processing an exhaust gas, which enable to suppress decrease of pH and increase of ORP of a mixture of an aqueous solution of a reducing agent and an aqueous alkali solution circulated within a wet reactor comprising a reduction reaction region and an oxidation reaction region. The method and apparatus enable to prevent deterioration of the mixed aqueous solution, and can be continuously operated for a long time. Specifically, the ORP and pH of the mixed aqueous solution of the aqueous solution of a reducing agent and the aqueous alkali solution to be circulated within the wet reactor are measured, and a fresh aqueous solution of a reducing agent and a fresh aqueous alkali solution are supplied, if necessary, into a reservoir unit arranged in the lower part of the wet reactor so that the ORP and pH of the mixed aqueous solution are kept within predetermined ranges.

Method and apparatus for processing exhaust gas

An exhaust gas treating apparatus includes an adsorption tower () that has an adsorption layer filled with an adsorbent and a heat transfer path through which heat is transferred to the adsorption layer. The apparatus performs switching among the following processes: an adsorption process of introducing an exhaust gas from an engine () into the adsorption layer of the adsorption tower so that target components to be treated, including NO, in the exhaust gas are adsorbed by the adsorbent; a desorption process of introducing the exhaust gas into the heat transfer path of the adsorption tower to heat the adsorption layer and introducing a desorption gas into the heated adsorption layer so that the target components are desorbed from the adsorbent, and a cooling process of introducing a cooling gas into the adsorption layer of the adsorption tower to cool the adsorption layer and introducing the cooling gas that has passed through the adsorption layer into an inlet of the engine. Thus, the apparatus can treat the exhaust gas with a small amount of energy consumption and without performing a wet treatment.

Exhaust gas treating apparatus and treating method

A method for treating exhaust gas includes: adsorbing target components in the exhaust gas with an adsorbent (); introducing a nitrogen gas with an oxygen concentration of 10 vol % or less and a purity of 90 vol % or more into the adsorbent (); and applying () nonthermal plasma to the adsorbent (). After the adsorbent () adsorbs the target components in the exhaust gas, the nitrogen gas is introduced into the adsorbent (), and then an electric discharge is generated so that the nonthermal plasma of the nitrogen gas is applied to the adsorbent () and causes desorption of the target components and regeneration of the adsorbent (). This method can remove the target components effectively from oxygen-containing exhaust gas by using nitrogen gas plasma with high activity as a result of ionization of a nitrogen gas and combining adsorption, desorption by the nitrogen gas plasma, and nitrogen plasma treatment.

Method and apparatus for treating exhaust gas

The present invention is characterized in that a casingconnected to an exhaust systema honeycomb filterplaced in the inside of the casingthe honeycomb filter having a plurality of cells partitioned by partition walls, and plasma generation electrodesplaced being faced each other by sandwiching the honeycomb filter there are included, particulate matter contained in an exhaust gas is collected by the honeycomb filternitrogen monoxide contained in the exhaust gas is oxidized to nitrogen dioxide by nonthermal plasma generated between a pulse electrodeand an earth electrodeconstituting the plasma generation electrodescombustible materials in the particulate matter collected and deposited on the surface of the partition walls are removed through oxidation by the nitrogen dioxide produced. As a result, the honeycomb filtercan be regenerated.

Exhaust gas treatment apparatus

Growing community of inventors

Sakai, Japan

Masaaki Okubo