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:
Sep. 26, 1989
Filed:
Apr. 28, 1988
Masaki Miyazawa, Tokyo, JP;
Norihisa Kobayashi, Tokyo, JP;
Hiromu Takatsuka, Nagasaki, JP;
Atsushi Morii, Nagasaki, JP;
Toshio Koyanagi, Nagasaki, JP;
Touru Seto, Hiroshima, JP;
Kozo Iida, Hiroshima, JP;
Shigeaki Mitsuoka, Hiroshima, JP;
Hiroaki Rikimaru, Osaka, JP;
Makoto Imanari, Ibaragi, JP;
Takeo Koshikawa, Ibaragi, JP;
Akihiro Yamauchi, Koganei, JP;
Masayuki Hanada, Kitakyushu, JP;
Morio Fukuda, Kitakyushu, JP;
Kiyoshi Nagano, Kitakyushu, JP;
Mitsubishi Jukogyo K.K., all of, JP;
Other;
Mitsubishi Petrochemical Co., Ltd., all of, JP;
Catalysts & Chemical Co., Ltd., all of, JP;
Abstract
Here is provided an adsorbent for adsorbing and removing an arsenic compound which becomes a catalyst poison in a selective contact reduction process for removing nitrogen oxides (NOx) from a combustion exhaust gas by the use of an ammonia as a reducing agent and a denitrating catalyst. The adsorbent of the present invention comprises a material in which the total volume of pores is 0.2 to 0.7 cc/g and the volume of the pores having a pore diameter of 300 .ANG. or more is 10% or more with respect to the total pore volume, and the material is a specific element, its oxide, an ion-exchanged zeolite or the like. In addition, the present invention is directed to a method for removing the arsenic compound from the combustion exhaust gas by injecting the adsorbent into the flow of the gas on the upstream side of the denitrating catalyst.