EXHAUST GAS PURIFICATION FILTER AND EXHAUST GAS PURIFICATION APPARATUS
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United States of America Patent
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Jul 14, 2016
app pub date -
Aug 20, 2014
filing date -
Aug 20, 2014
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Abstract
Provided are an exhaust gas purification filter in which, even in the coexistence of a catalyst capable of combusting particulate matter (PM) contained in exhaust gases and an SCR catalyst capable of reducing nitrogen oxides in exhaust gases to nitrogen, the catalytic function of the SCR catalyst is prevented from being impaired, and an exhaust gas purification apparatus equipped with the filter. An exhaust gas purification filter includes: an oxide containing one or more elements selected from alkali metals and one or more elements selected from Zr, Si, Al, and Ti; and a zeolite having silica/alumina ratio of 15 or more.
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