To provide an exhaust gas cleaning system wherein a low temperature ignitable catalyst composition or catalyst body developing cleaning capacity at a lower temperature in order to effectively clean HC in exhaust gas at the time of cold start and an adsorbent or adsorption body having HC adsorption capacity or an adsorption/catalyst body are combined, and an exhaust gas cleaning method using this system.
The exhaust gas cleaning system is constituted by arranging the low temperature ignitable catalyst composition, which includes a substance having electron donating action and/or nitrogen dioxide absorbing and discharging action and a noble metal and an adsorbent having hydrocarbon adsorption capacity or a catalyst body, wherein the low temperature ignitable catalyst composition which includes the substance having electron donating action and/or nitrogen dioxide absorbing and discharging action and the noble metal is supported on a carrier as a catalyst layer, and the adsorption body, wherein the adsorbent having hydrocarbon adsorbing capacity is supported on a carrier as an adsorption layer, in the exhaust body of an internal combustion engine. The exhaust gas cleaning method using this system is also disclosed.
SHIBAGAKI YUKINARI
MIZUNO HIROSHIGE
TAKAHASHI AKIRA
