The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 16, 2008
Filed:
Feb. 25, 2002
Isao Mochida, Fukuoka, JP;
Akinori Yasutake, Nagasaki, JP;
Toshihiko Setoguchi, Nagasaki, JP;
Norihisa Kobayashi, Chiyoda-ku, JP;
Takahiro Kasuh, Osaka, JP;
Masaaki Yoshikawa, Osaka, JP;
Isao Mochida, Fukuoka, JP;
Akinori Yasutake, Nagasaki, JP;
Toshihiko Setoguchi, Nagasaki, JP;
Norihisa Kobayashi, Chiyoda-ku, JP;
Takahiro Kasuh, Osaka, JP;
Masaaki Yoshikawa, Osaka, JP;
Osaka Gas Company Limited, Osaka shi, JP;
Mitsubishi Jukogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
This invention relates to a technique for removing nitrogen oxides (NO) present in exhaust gases discharged from boilers and the like. When the temperature of the exhaust gas is 100° C. or below, a heat-treated active carbon produced by heat-treating a raw active carbon at 600 to 1,200° C. in a non-oxidizing atmosphere so as to remove oxygen-containing functional groups present at the surfaces thereof and thereby reduce the atomic surface oxygen/surface carbon ratio to 0.05 or less is preferably used. When the temperature of the exhaust gas exceeds 100° C., a heat-treated active carbon produced by heat-treating a raw active carbon at 600. to 1,200° C. in a non-oxidizing atmosphere and activating the surfaces thereof with sulfuric acid or nitric acid to impart oxidizing oxygen-containing functional groups thereto is preferably used.