Catalyst for purifying exhaust gas from internal combustion engine and process for purifying exhaust gas using the same
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United States of America Patent
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Jul 8, 2014
Grant Date -
Feb 3, 2011
app pub date -
Mar 13, 2009
filing date -
Mar 19, 2008
priority date (Note) -
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Abstract
An Object of the patent is to remove highly reducing hydrocarbon exhausted during acceleration period, and to remove efficiently hydrocarbon even after contacting with highly reducing hydrocarbon. By using a catalyst having a higher proportion of palladium having surface charge of 2-valence or 4-valence supported than that of 0-valence by supporting palladium together with magnesium oxide, hydrocarbon exhausted from an internal combustion engine especially during acceleration period can be efficiently removed.
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