{
  "$type": "site.standard.document",
  "description": "In a reciprocating internal combustion engine having a turbocharger, the removal of NO X from exhaust gas with use of a SCR system is made possible without causing deterioration of transient characteristics of the reciprocating internal combustion engine. In a reciprocating marine diesel engine…",
  "path": "/patents/996851",
  "publishedAt": "2012-10-24T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F01N3/08",
    "MITSUBISHI HEAVY IND LTD [JP]"
  ],
  "textContent": "In a reciprocating internal combustion engine having a turbocharger, the removal of NO X from exhaust gas with use of a SCR system is made possible without causing deterioration of transient characteristics of the reciprocating internal combustion engine. In a reciprocating marine diesel engine (10) having a turbocharger (30) arranged in an exhaust pipe (38, 44, 48), an aqueous urea solution supply unit (42) is provided in the exhaust pipe (38) upstream of a turbine (34), so that an aqueous urea solution (b) is supplied from an aqueous urea solution tank (40). The aqueous urea solution (b) is evaporated with potential heat of the exhaust gas and hydrolyzed into ammonia gas. The ammonia gas is uniformly stirred and mixed with the exhaust gas in a highly turbulent field of the turbine (34). The exhaust gas is then sent to a SCR catalyst converter (46) provided in the exhaust pipe (44) downstream of the turbocharger (30), where NO X in the exhaust gas is reduced by the ammonia gas into nitrogen and water vapor. Since the aqueous urea solution (b) is supplied to the exhaust pipe (38) upstream of the turbine (34), ammonia gas can be generated without the need of any additional heating equipment such as an auxiliary burner.",
  "title": "EXHAUST GAS PURIFICATION METHOD AND EXHAUST GAS PURIFICATION SYSTEM FOR RECIPROCATING INTERNAL COMBUSTION ENGINE"
}