Method for purifying exhaust gas from a diesel engine
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United States of America Patent
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May 13, 1997
Issued Date -
N/A
app pub date -
Jan 24, 1994
filing date -
Feb 6, 1989
priority date (Note) -
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Abstract
A method for purifying exhaust gases from a diesel engine is provided. The method utilizes a flow through type honeycomb catalyst having parallel through-cells and (1) a cross-sectional area at the inlet part of an exhaust gas cut by a face vertical to the direction of the through-cells of 10 to 100 cm.sup.2, preferably 20 to 80 cm.sup.2, per liter of the displacement of the engine, (2) an hydraulic diameter of the through-cells of 1.00 to 2.00 mm, preferably 1.10 to 1.40 mm, and (3) the percentage of open frontal area at the inlet part of the exhaust gas of 40 to 95%, preferably 50 to 85%.
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