| 摘要 |
<p>An exhaust gas conversion system includes an oxide catalyst, a filter, and a SCR (Selective Catalytic Reduction) catalyst that are sequentially arranged in a direction in which an exhaust gas flows in an exhuast path of a diesel engine, and a part positioned between the filter and the SCR catalyst and configured to supply ammonia. The filter is a honeycomb structural body including a honeycomb unit having a plurality of through holes divided by partition walls and arranged in a longitudinal direction thereof and the plural through holes are sealed on one end of the honeycomb unit. The SCR catalyst is a honeycomb structural body including a honeycomb unit having a plurality of through holes divided by partition walls and arranged in a longitudinal direction thereof. A ratio of an area of a cross section of the SCR catalyst perpendicular to a longitudinal direction of the SCR catalyst with respect to an area of a cross section of the filter perpendicular to a longitudinal direction of the DPF is 0.55 or more and 0.90 or less. The area of the cross section of the filter perpendicular to the longitudinal direction of the DPF is 300 cm 2 or more and 1000 cm 2 or less.</p> |
