Method for purifying gas, gas purifying apparatus, and gas...

B - Operations – Transporting – 01 – J

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B01J 23/54 (2006.01) B01D 53/56 (2006.01) B01D 53/62 (2006.01) B01D 53/86 (2006.01) C01B 3/16 (2006.01)

Patent

CA 2596453

This invention provides a method involving the use of a non-ammonia-based deNOx catalyst for reducing the amount of NOx in exhaust combustion gas discharged from a boiler and an internal-combustion engine, wherein NOx and CO contained in exhaust gas are allowed to selectively react to reduce and remove NOx. This method involves the use of a catalyst comprising a cerium-zirconium composite oxide with Au supported thereon or a catalyst comprising a cerium-oxide-containing porous carrier with zirconium and Au supported thereon. Use of such catalyst enables purification of NOx and CO in exhaust gas and also enables generation of hydrogen.

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