System using selective catalytic reduction for improving low-temperature De-NOx efficiency and reducing yellow plume
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United States of America Patent
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Dec 23, 2014
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Oct 20, 2011
filing date -
Nov 9, 2010
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Abstract
The present disclosure relates to a method for removing nitrogen oxides (NOx) more effectively at 300° C. or below in boilers, gas turbines, incinerators, diesel engines, glass melting furnaces, etc. by selective catalytic reduction (SCR). To this end, an oxidation catalyst is mounted in front of a NOx-reducing device based on selective catalytic reduction and the NOx composition, i.e. the ratio of NO:NO2, in the exhaust gas is adjusted to about 1:1, such that de-NOx catalytic reaction is carried out under optimized fast SCR condition and de-NOx efficiency at low temperature can be maximized.
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