Process for treating flue gas
 A coal or petroleum combustion flue gas containing sulfur oxides and dust is treated by contacting the flue gas with a sulfur dioxide-oxidizing catalyst, thereby converting sulfur dioxide to sulfur trioxide, allowing the resulting sulfur trioxide to react with components of dust, absorbing the trioxide into the dust as a sulfate, and removing the dust. Catalytic oxidation of sulfur dioxide can be efficiently carried out at a low temperature and sulfur oxides can be efficiently removed from the flue gas. 
Hitachi, Ltd. Babcock-Hitachi Kabushiki Kaisha
B B C
B01J B01D C01B
inventional inventional inventional
Hidetoshi Toshikatsu Shimpei Teruo Fumito Akira Yukio
Akimoto Mori Matsuda Kumagai Nakajima Kato Hishinuma