EP 1979585 A1 20081015 - EXHAUST GAS-PURIFYING APPARATUS AND EXHAUST GAS-PURIFYING METHOD
Title (en)
EXHAUST GAS-PURIFYING APPARATUS AND EXHAUST GAS-PURIFYING METHOD
Title (de)
ABGASREINIGUNGSGERÄT UND ABGASREINIGUNGSVERFAHREN
Title (fr)
APPAREIL DE PURIFICATION DE GAZ D'ECHAPPEMENT ET PROCEDE DE PURIFICATION DE GAZ D'ECHAPPEMENT
Publication
Application
Priority
- JP 2007050549 W 20070110
- JP 2006008916 A 20060117
Abstract (en)
[origin: WO2007083639A1] An exhaust gas purifying apparatus, including an NOx occlusion reduction catalyst (2) and a filter catalyst (3) arranged in series, is used, and the exhaust gas is allowed to flow from the NOx occlusion reduction catalyst (2) to the filter catalyst (3) in a normal flow process, and, in a recovery process for allowing exhaust gas added with a reducing agent to flow, the flow direction of the exhaust gas is reversed toward the NOx occlusion reduction catalyst (2) from the filter catalyst (3). Since the exhaust gas is heated by reaction heat of the filter catalyst (3), the NOx occlusion reduction catalyst (2) can recover from sulfur poisoning in the exhaust gas at a low temperature. Thereby, overheating of the filter catalyst (3) is prevented. Therefore, recovery from sulfur poisoning can be improved, and also deterioration and breakage of the filter catalyst can be prevented.
IPC 8 full level
F01N 3/025 (2006.01); F01N 3/035 (2006.01); F01N 3/08 (2006.01)
CPC (source: EP KR US)
B01D 53/9431 (2013.01 - EP US); B01D 53/944 (2013.01 - EP US); F01N 3/0233 (2013.01 - EP US); F01N 3/025 (2013.01 - KR); F01N 3/0253 (2013.01 - EP US); F01N 3/035 (2013.01 - EP KR US); F01N 3/08 (2013.01 - KR); F01N 3/0842 (2013.01 - EP US); F01N 3/0885 (2013.01 - EP US); F01N 3/2093 (2013.01 - EP US); F01N 13/0097 (2014.06 - EP US); B01D 2258/012 (2013.01 - EP US); F01N 3/0821 (2013.01 - EP US); F01N 2240/36 (2013.01 - EP US); Y02T 10/12 (2013.01 - EP US)
Citation (search report)
See references of WO 2007083639A1
Designated contracting state (EPC)
DE ES FR GB IT
DOCDB simple family (publication)
WO 2007083639 A1 20070726; BR PI0706870 A2 20110412; CN 101371017 A 20090218; EP 1979585 A1 20081015; JP 2007192055 A 20070802; KR 20080085871 A 20080924; RU 2008133619 A 20100227; RU 2392456 C2 20100620; US 2010205936 A1 20100819
DOCDB simple family (application)
JP 2007050549 W 20070110; BR PI0706870 A 20070110; CN 200780002541 A 20070110; EP 07706876 A 20070110; JP 2006008916 A 20060117; KR 20087017296 A 20080716; RU 2008133619 A 20070110; US 16048807 A 20070110