Other

Mitsubishi Petrochemical Company Limited

Mitsubishi Jukogyo K.k.

Catalysts & Chemical Co., Ltd.

Masaki Miyazawa

Norihisa Kobayashi

Kozo Iida

Shigeaki Mitsuoka

Makoto Imanari

Atsushi Morii

Touru Seto

Morio Fukuda

Toshio Koyanagi

Masayuki Hanada

Takeo Koshikawa

Akihiro Yamauchi

Kiyoshi Nagano

Hiroaki Rikimaru

Hiromu Takatsuka

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.

Adsorbent for arsenic compound and method for removing arsenic compound

Growing community of inventors

Tokyo, Japan

Masaki Miyazawa