{
  "$type": "site.standard.document",
  "description": "An exhaust gas purification system (1, 1A) for removing particulate matters and nitrogen oxides in the exhaust gas (G) of an internal combustion engine (10) is formed by disposing a previous-stage oxidation catalyst device (21), an ammonia-based solution feeder (24), a DPF device (22), a turbine…",
  "path": "/patents/962223",
  "publishedAt": "2015-04-01T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B01D53/90",
    "ISUZU MOTORS LTD [JP]"
  ],
  "textContent": "An exhaust gas purification system (1, 1A) for removing particulate matters and nitrogen oxides in the exhaust gas (G) of an internal combustion engine (10) is formed by disposing a previous-stage oxidation catalyst device (21), an ammonia-based solution feeder (24), a DPF device (22), a turbine (14) of a turbocharger, and a NOx selective reduction catalyst device (SCR device) (23) in the exhaust system of the internal combustion engine (10) in this order from an exhaust port side. With the suitable arrangement of the exhaust gas purification units, the NH 3 production rate is improved to improve the NOx removal rate; the temperature of the DPF device is kept high to increase the time and frequency of continuous regeneration, thus decreasing the frequency of forced regeneration of the DPF device and the amount of discharge of CO 2 produced during the forced regeneration; and also corrosion of the turbine of the turbocharger by SOx is suppressed.",
  "title": "EXHAUST GAS PURIFICATION METHOD"
}