| 摘要 |
A method for treating an ammonia(NH3)-containing gas to clarify the gas, which comprises contacting the NH3-containing gas to pass through a catalyst tower (9) firstly with a pre-treatment catalyst layer (1) having, in parallel, a flow path involving a catalyst layer having the function of oxidizing NH3 to form NO and a flow path involving a catalyst layer not having the above function, and then, contacting the resultant gas with a catalyst layer (2) having the denitration function and the function of oxidizing NH3 to form NO in combination; and an apparatus for practicing the method. The method allows the treatment of a gas containing NH3 in a high concentration with good efficiency, without the thermal deterioration of a catalyst layer or the increase of the generation of NOxas a by-product, and thus can be employed for converting NH3 in an exhaust gas or NH3 expelled from a waste water to a vapor phase to a harmless gas and for oxidizing and decomposing NH3 in a gas containing NH3 in a high concentration into nitrogen. ® KIPO & WIPO 2007
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