| 摘要 |
[Problem] Provided is a catalyst for decomposing ammonia, which has stable ammonia decomposition performance even for exhaust gas containing SOx (SO 2 and SO 3 ) at a high concentration caused subsequent to the denitration catalyst system using an ammonia-based reducing agent in a purification treatment of, e.g., exhaust gas from an internal combustion engine, such as a marine diesel engine. [Solution] A catalyst for decomposing ammonia in exhaust gas has as a catalyst base a denitration catalyst having supported thereon titanium oxide and vanadium oxide, or as a catalyst base a denitration catalyst having supported thereon titanium oxide, vanadium oxide, and tungsten oxide, and further having supported thereon zinc, calcium, and phosphorus as catalytically active components. The exhaust gas is exhaust gas containing ammonia and sulfur oxides from an internal combustion engine, such as a marine diesel engine. |
