Patent ID: 8042328
Filing Date: 2011-10-25
Classification: B01D,F01N,Y02T

Abstract:
1. An exhaust gas purifier being displaced in an exhaust passage of an internal combustion engine or a combustion instrument, in the exhaust passage, the exhaust gas purifier comprising: a nitrogen oxide adsorbent temporarily adsorbing nitrogen oxide and desorbing the adsorbed nitrogen oxide by heating or reducing atmosphere; adsorbed substance desorbing means being disposed on an exhaust gas upstream side of the nitrogen oxide adsorbent, the adsorbed substance desorbing means heating the exhaust gas or air or converting the exhaust gas or air into a reducing atmosphere; a combustion apparatus being disposed on an exhaust gas downstream side of the nitrogen oxide adsorbent, the combustion apparatus including air supply means, fuel supply means, and ignition means; and a filter apparatus being disposed on an exhaust gas downstream side of the combustion apparatus to be able to capture a particulate substance contained in the exhaust gas; a plurality of branch exhaust passages branched from the exhaust passage; and blocking means for being able to block gas flow is provided in an exhaust gas inlet of each branch exhaust passage, wherein each branch exhaust passage includes the nitrogen oxide adsorbent, the adsorbed substance desorbing means, the combustion apparatus and the filter apparatus, and the adsorbed substance desorbing means includes air supply means and the adsorbed substance desorbing means is configured to heat air from the air supply means or to convert the air into the reducing atmosphere.