Mitsubishi Heavy Industries Limited

Toshiaki Ohkubo

Yuichi Fujioka

Kikuo Tokunaga

Norihisa Kobayashi

Akinori Yasutake

Toshihiko Setoguchi

Toshimitsu Ichinose

Osamu Naito

Yoshihiko Tsuchiyama

Akira Hattori

Nobuaki Murakami

Katsuyuki Ueda

Shuya Nagayama

Masashi Hishida

Yoshiyuki Wakabayashi

Device for eliminating particulates in exhaust gas and method for eliminating the particulates

An ammonia generating method characterized by generating ammonia by the contact hydrolysis of urea by contacting at 200&deg; C. or more an aqueous solution of urea with a contact hydrolysis catalyst containing at least one selected from the group consisting of hydroxides, carbonates, and silicates of alkaline metals as the main component, and a combusted exhaust gas processing method using the ammonia generated by the method.

Exhaust gas processing method

This invention relates to a method for decreasing sulfuric acid and sulfuric anhydride present in combustion exhaust gas which comprises adding an SO,-decreasing agent (hydrogen gas) to combustion exhaust gas and thereby reducing sulfuric acid (H,SO,) and sulfuric anhydride (SO,) present in the combustion exhaust gas, as well as a combustion exhaust gas flow system therefor. Thus, this invention provides a method for decreasing sulfuric acid and sulfuric anhydride present in combustion gas which can prevent the occurrence of troubles (e.g., low-temperature corrosion and ash deposition) arising from H,SO,and S,contained in combustion gas.

Method for decreasing sulfuric acid and sulfuric anhydride present in combustion exhaust gas

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Nagasaki, Japan

Toshiaki Ohkubo