| 摘要 |
<p>PURPOSE:To perform effective purification of exhaust gas containing harmful elements such as carcinogen by setting an angle formed by the flow direction of exhaust gas, led into a honeycomb exhaust gas purifying structure body provided with plural mutually parallel through holes, and the inlet cross section of this structure body within a specific range. CONSTITUTION:At the time of purifying diesel engine exhaust gas using a honeycomb structure body, an angle alpha between the flow direction of exhaust gas led into the honeycomb structure body and the inlet cross section of the honeycomb structure body is set to 0 deg.<alpha<90 deg., desirably 30 deg.<=alpha<=70 deg.. In this honeycomb exhaust gas structure body, fire resistant inorganic oxide of 50-400m<2>/g in specific surface area is carried by honeycomb carriers at the rate of 50-400g per honeycomb carrier. Diesel engine exhaust gas can be thus purified efficiently using the honeycomb exhaust gas purifying structure body, and especially SOF in diesel engine exhaust gas can be removed efficiently.</p> |
